From 26a029d407be480d791972afb5975cf62c9360a6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Fri, 19 Apr 2024 02:47:55 +0200 Subject: Adding upstream version 124.0.1. Signed-off-by: Daniel Baumann --- testing/modules/AppData.sys.mjs | 88 + testing/modules/AppInfo.sys.mjs | 138 + testing/modules/Assert.sys.mjs | 731 + testing/modules/CoverageUtils.sys.mjs | 211 + testing/modules/FileTestUtils.sys.mjs | 126 + testing/modules/MockRegistrar.sys.mjs | 126 + testing/modules/MockRegistry.sys.mjs | 145 + testing/modules/Sinon.sys.mjs | 40 + testing/modules/StructuredLog.sys.mjs | 304 + testing/modules/TestUtils.sys.mjs | 381 + testing/modules/XPCShellContentUtils.sys.mjs | 479 + testing/modules/moz.build | 39 + testing/modules/sinon-7.2.7.js | 31787 +++++++++++++++++++ testing/modules/tests/browser/browser.toml | 3 + .../modules/tests/browser/browser_test_assert.js | 21 + testing/modules/tests/xpcshell/test_assert.js | 491 + .../modules/tests/xpcshell/test_mockRegistrar.js | 65 + .../modules/tests/xpcshell/test_structuredlog.js | 147 + testing/modules/tests/xpcshell/xpcshell.toml | 8 + 19 files changed, 35330 insertions(+) create mode 100644 testing/modules/AppData.sys.mjs create mode 100644 testing/modules/AppInfo.sys.mjs create mode 100644 testing/modules/Assert.sys.mjs create mode 100644 testing/modules/CoverageUtils.sys.mjs create mode 100644 testing/modules/FileTestUtils.sys.mjs create mode 100644 testing/modules/MockRegistrar.sys.mjs create mode 100644 testing/modules/MockRegistry.sys.mjs create mode 100644 testing/modules/Sinon.sys.mjs create mode 100644 testing/modules/StructuredLog.sys.mjs create mode 100644 testing/modules/TestUtils.sys.mjs create mode 100644 testing/modules/XPCShellContentUtils.sys.mjs create mode 100644 testing/modules/moz.build create mode 100644 testing/modules/sinon-7.2.7.js create mode 100644 testing/modules/tests/browser/browser.toml create mode 100644 testing/modules/tests/browser/browser_test_assert.js create mode 100644 testing/modules/tests/xpcshell/test_assert.js create mode 100644 testing/modules/tests/xpcshell/test_mockRegistrar.js create mode 100644 testing/modules/tests/xpcshell/test_structuredlog.js create mode 100644 testing/modules/tests/xpcshell/xpcshell.toml (limited to 'testing/modules') diff --git a/testing/modules/AppData.sys.mjs b/testing/modules/AppData.sys.mjs new file mode 100644 index 0000000000..0eaa3ba722 --- /dev/null +++ b/testing/modules/AppData.sys.mjs @@ -0,0 +1,88 @@ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +// Reference needed in order for fake app dir provider to be active. +var gFakeAppDirectoryProvider; + +/** + * Installs a fake UAppData directory. + * + * This is needed by tests because a UAppData directory typically isn't + * present in the test environment. + * + * We create the new UAppData directory under the profile's directory + * because the profile directory is automatically cleaned as part of + * test shutdown. + * + * This returns a promise that will be resolved once the new directory + * is created and installed. + */ +export var makeFakeAppDir = function () { + let dirMode = 0o700; + let baseFile = Services.dirsvc.get("ProfD", Ci.nsIFile); + let appD = baseFile.clone(); + appD.append("UAppData"); + + if (gFakeAppDirectoryProvider) { + return Promise.resolve(appD.path); + } + + function makeDir(f) { + if (f.exists()) { + return; + } + + dump("Creating directory: " + f.path + "\n"); + f.create(Ci.nsIFile.DIRECTORY_TYPE, dirMode); + } + + makeDir(appD); + + let reportsD = appD.clone(); + reportsD.append("Crash Reports"); + + let pendingD = reportsD.clone(); + pendingD.append("pending"); + let submittedD = reportsD.clone(); + submittedD.append("submitted"); + + makeDir(reportsD); + makeDir(pendingD); + makeDir(submittedD); + + let provider = { + getFile(prop, persistent) { + persistent.value = true; + if (prop == "UAppData") { + return appD.clone(); + } + + throw Components.Exception("", Cr.NS_ERROR_FAILURE); + }, + + QueryInterace(iid) { + if ( + iid.equals(Ci.nsIDirectoryServiceProvider) || + iid.equals(Ci.nsISupports) + ) { + return this; + } + + throw Components.Exception("", Cr.NS_ERROR_NO_INTERFACE); + }, + }; + + // Register the new provider. + Services.dirsvc.registerProvider(provider); + + // And undefine the old one. + try { + Services.dirsvc.undefine("UAppData"); + } catch (ex) {} + + gFakeAppDirectoryProvider = provider; + + dump("Successfully installed fake UAppDir\n"); + return Promise.resolve(appD.path); +}; diff --git a/testing/modules/AppInfo.sys.mjs b/testing/modules/AppInfo.sys.mjs new file mode 100644 index 0000000000..56d074e380 --- /dev/null +++ b/testing/modules/AppInfo.sys.mjs @@ -0,0 +1,138 @@ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +let origPlatformInfo = Cc["@mozilla.org/xre/app-info;1"].getService( + Ci.nsIPlatformInfo +); + +// eslint-disable-next-line mozilla/use-services +let origRuntime = Cc["@mozilla.org/xre/app-info;1"].getService( + Ci.nsIXULRuntime +); + +/** + * Create new XULAppInfo instance with specified options. + * + * options is a object with following keys: + * ID: nsIXULAppInfo.ID + * name: nsIXULAppInfo.name + * version: nsIXULAppInfo.version + * platformVersion: nsIXULAppInfo.platformVersion + * OS: nsIXULRuntime.OS + * appBuildID: nsIXULRuntime.appBuildID + * lastAppBuildID: nsIXULRuntime.lastAppBuildID + * lastAppVersion: nsIXULRuntime.lastAppVersion + * + * crashReporter: nsICrashReporter interface is implemented if true + */ +export var newAppInfo = function (options = {}) { + let appInfo = { + // nsIXULAppInfo + vendor: "Mozilla", + name: options.name ?? "xpcshell", + ID: options.ID ?? "xpcshell@tests.mozilla.org", + version: options.version ?? "1", + appBuildID: options.appBuildID ?? "20160315", + + // nsIPlatformInfo + platformVersion: options.platformVersion ?? "p-ver", + platformBuildID: origPlatformInfo.platformBuildID, + + // nsIXULRuntime + ...Ci.nsIXULRuntime, + inSafeMode: false, + logConsoleErrors: true, + OS: options.OS ?? "XPCShell", + XPCOMABI: "noarch-spidermonkey", + invalidateCachesOnRestart() {}, + processType: origRuntime.processType, + uniqueProcessID: origRuntime.uniqueProcessID, + + fissionAutostart: origRuntime.fissionAutostart, + sessionHistoryInParent: origRuntime.sessionHistoryInParent, + browserTabsRemoteAutostart: origRuntime.browserTabsRemoteAutostart, + get maxWebProcessCount() { + return origRuntime.maxWebProcessCount; + }, + get launcherProcessState() { + return origRuntime.launcherProcessState; + }, + + // nsIWinAppHelper + get userCanElevate() { + return false; + }, + }; + + appInfo.lastAppBuildID = options.lastAppBuildID ?? appInfo.appBuildID; + appInfo.lastAppVersion = options.lastAppVersion ?? appInfo.version; + + let interfaces = [ + Ci.nsIXULAppInfo, + Ci.nsIPlatformInfo, + Ci.nsIXULRuntime, + Ci.nsICrashReporter, + ]; + if ("nsIWinAppHelper" in Ci) { + interfaces.push(Ci.nsIWinAppHelper); + } + + // nsICrashReporter + appInfo.annotations = {}; + appInfo.annotateCrashReport = function (key, data) { + if (options.crashReporter) { + this.annotations[key] = data; + } else { + throw Components.Exception("", Cr.NS_ERROR_NOT_INITIALIZED); + } + }; + + appInfo.QueryInterface = ChromeUtils.generateQI(interfaces); + + return appInfo; +}; + +var currentAppInfo = newAppInfo(); + +/** + * Obtain a reference to the current object used to define XULAppInfo. + */ +export var getAppInfo = function () { + return currentAppInfo; +}; + +/** + * Update the current application info. + * + * See newAppInfo for options. + * + * To change the current XULAppInfo, simply call this function. If there was + * a previously registered app info object, it will be unloaded and replaced. + */ +export var updateAppInfo = function (options) { + currentAppInfo = newAppInfo(options); + + let id = Components.ID("{fbfae60b-64a4-44ef-a911-08ceb70b9f31}"); + let contractid = "@mozilla.org/xre/app-info;1"; + let registrar = Components.manager.QueryInterface(Ci.nsIComponentRegistrar); + + // Unregister an existing factory if one exists. + try { + let existing = Components.manager.getClassObjectByContractID( + contractid, + Ci.nsIFactory + ); + registrar.unregisterFactory(id, existing); + } catch (ex) {} + + let factory = { + createInstance(iid) { + return currentAppInfo.QueryInterface(iid); + }, + }; + + Services.appinfo = currentAppInfo; + + registrar.registerFactory(id, "XULAppInfo", contractid, factory); +}; diff --git a/testing/modules/Assert.sys.mjs b/testing/modules/Assert.sys.mjs new file mode 100644 index 0000000000..47e2d3700d --- /dev/null +++ b/testing/modules/Assert.sys.mjs @@ -0,0 +1,731 @@ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +// Originally from narwhal.js (http://narwhaljs.org) +// Copyright (c) 2009 Thomas Robinson <280north.com> +// MIT license: http://opensource.org/licenses/MIT + +import { ObjectUtils } from "resource://gre/modules/ObjectUtils.sys.mjs"; + +/** + * This module is based on the + * `CommonJS spec `_ + * + * When you see a jsdoc comment that contains a number, it's a reference to a + * specific section of the CommonJS spec. + * + * 1. The assert module provides functions that throw AssertionError's when + * particular conditions are not met. + * + * To use the module you may instantiate it first. + * + * @param {reporterFunc} reporterFunc + * Allows consumers to override reporting for this instance. + * @param {boolean} isDefault + * Used by test suites to set ``reporterFunc`` as the default + * used by the global instance, which is called for example + * by other test-only modules. This is false when the + * reporter is set by content scripts, because they may still + * run in the parent process. + * + * @class + */ +export function Assert(reporterFunc, isDefault) { + if (reporterFunc) { + this.setReporter(reporterFunc); + } + if (isDefault) { + Assert.setReporter(reporterFunc); + } +} + +// This allows using the Assert object as an additional global instance. +Object.setPrototypeOf(Assert, Assert.prototype); + +function instanceOf(object, type) { + return Object.prototype.toString.call(object) == "[object " + type + "]"; +} + +function replacer(key, value) { + if (value === undefined) { + return "" + value; + } + if (typeof value === "number" && (isNaN(value) || !isFinite(value))) { + return value.toString(); + } + if (typeof value === "function" || instanceOf(value, "RegExp")) { + return value.toString(); + } + if ( + typeof value === "object" && + value !== null && + "QueryInterface" in value + ) { + return value.toString(); + } + return value; +} + +const kTruncateLength = 128; + +function truncate(text, newLength = kTruncateLength) { + if (typeof text == "string") { + return text.length < newLength ? text : text.slice(0, newLength); + } + return text; +} + +function getMessage(error, prefix = "") { + let actual, expected; + // Wrap calls to JSON.stringify in try...catch blocks, as they may throw. If + // so, fall back to toString(). + try { + actual = JSON.stringify(error.actual, replacer); + } catch (ex) { + actual = Object.prototype.toString.call(error.actual); + } + try { + expected = JSON.stringify(error.expected, replacer); + } catch (ex) { + expected = Object.prototype.toString.call(error.expected); + } + let message = prefix; + if (error.operator) { + let truncateLength = error.truncate ? kTruncateLength : Infinity; + message += + (prefix ? " - " : "") + + truncate(actual, truncateLength) + + " " + + error.operator + + " " + + truncate(expected, truncateLength); + } + return message; +} + +/** + * 2. The AssertionError is defined in assert. + * + * At present only the four keys mentioned below are used and + * understood by the spec. Implementations or sub modules can pass + * other keys to the AssertionError's constructor - they will be + * ignored. + * + * @example + * + * new assert.AssertionError({ + * message: message, + * actual: actual, + * expected: expected, + * operator: operator, + * truncate: truncate, + * stack: stack, // Optional, defaults to the current stack. + * }); + * + */ +Assert.AssertionError = function (options) { + this.name = "AssertionError"; + this.actual = options.actual; + this.expected = options.expected; + this.operator = options.operator; + this.message = getMessage(this, options.message, options.truncate); + // The part of the stack that comes from this module is not interesting. + let stack = options.stack || Components.stack; + do { + stack = stack.asyncCaller || stack.caller; + } while ( + stack && + stack.filename && + stack.filename.includes("Assert.sys.mjs") + ); + this.stack = stack; +}; + +// assert.AssertionError instanceof Error +Assert.AssertionError.prototype = Object.create(Error.prototype, { + constructor: { + value: Assert.AssertionError, + enumerable: false, + writable: true, + configurable: true, + }, +}); + +Assert.prototype._reporter = null; + +/** + * This callback type is used for custom assertion report handling. + * + * @callback reporterFunc + * @param {AssertionError|null} err + * An error object when the assertion failed, or null when it passed. + * @param {String} message + * Message describing the assertion. + * @param {Stack} stack + * Stack trace of the assertion function. + */ + +/** + * Set a custom assertion report handler function. + * + * @example + * + * Assert.setReporter(function customReporter(err, message, stack) { + * if (err) { + * do_report_result(false, err.message, err.stack); + * } else { + * do_report_result(true, message, stack); + * } + * }); + * + * @param {reporterFunc} reporterFunc + * Report handler function. + */ +Assert.prototype.setReporter = function (reporterFunc) { + this._reporter = reporterFunc; +}; + +/** + * 3. All of the following functions must throw an AssertionError when a + * corresponding condition is not met, with a message that may be undefined if + * not provided. All assertion methods provide both the actual and expected + * values to the assertion error for display purposes. + * + * This report method only throws errors on assertion failures, as per spec, + * but consumers of this module (think: xpcshell-test, mochitest) may want to + * override this default implementation. + * + * @example + * + * // The following will report an assertion failure. + * this.report(1 != 2, 1, 2, "testing JS number math!", "=="); + * + * @param {boolean} failed + * Indicates if the assertion failed or not. + * @param {*} actual + * The result of evaluating the assertion. + * @param {*} [expected] + * Expected result from the test author. + * @param {String} [message] + * Short explanation of the expected result. + * @param {String} [operator] + * Operation qualifier used by the assertion method (ex: '=='). + * @param {boolean} [truncate=true] + * Whether or not ``actual`` and ``expected`` should be truncated when printing. + * @param {nsIStackFrame} [stack] + * The stack trace including the caller of the assertion method, + * if this cannot be inferred automatically (e.g. due to async callbacks). + */ +Assert.prototype.report = function ( + failed, + actual, + expected, + message, + operator, + truncate = true, + stack = null // Defaults to Components.stack in AssertionError. +) { + // Although not ideal, we allow a "null" message due to the way some of the extension tests + // work. + if (message !== undefined && message !== null && typeof message != "string") { + this.ok( + false, + `Expected a string or undefined for the error message to Assert.*, got ${typeof message}` + ); + } + let err = new Assert.AssertionError({ + message, + actual, + expected, + operator, + truncate, + stack, + }); + if (!this._reporter) { + // If no custom reporter is set, throw the error. + if (failed) { + throw err; + } + } else { + this._reporter(failed ? err : null, err.message, err.stack); + } +}; + +/** + * 4. Pure assertion tests whether a value is truthy, as determined by !!guard. + * ``assert.ok(guard, message_opt);`` + * This statement is equivalent to ``assert.equal(true, !!guard, message_opt);``. + * To test strictly for the value true, use ``assert.strictEqual(true, guard, + * message_opt);``. + * + * @param {*} value + * Test subject to be evaluated as truthy. + * @param {String} [message] + * Short explanation of the expected result. + */ +Assert.prototype.ok = function (value, message) { + if (arguments.length > 2) { + this.report( + true, + false, + true, + "Too many arguments passed to `Assert.ok()`", + "==" + ); + } else { + this.report(!value, value, true, message, "=="); + } +}; + +/** + * 5. The equality assertion tests shallow, coercive equality with ==. + * ``assert.equal(actual, expected, message_opt);`` + * + * @param {*} actual + * Test subject to be evaluated as equivalent to ``expected``. + * @param {*} expected + * Test reference to evaluate against ``actual``. + * @param {String} [message] + * Short explanation of the expected result. + */ +Assert.prototype.equal = function equal(actual, expected, message) { + this.report(actual != expected, actual, expected, message, "=="); +}; + +/** + * 6. The non-equality assertion tests for whether two objects are not equal + * with ``!=`` + * + * @example + * assert.notEqual(actual, expected, message_opt); + * + * @param {*} actual + * Test subject to be evaluated as NOT equivalent to ``expected``. + * @param {*} expected + * Test reference to evaluate against ``actual``. + * @param {String} [message] + * Short explanation of the expected result. + */ +Assert.prototype.notEqual = function notEqual(actual, expected, message) { + this.report(actual == expected, actual, expected, message, "!="); +}; + +/** + * 7. The equivalence assertion tests a deep equality relation. + * assert.deepEqual(actual, expected, message_opt); + * + * We check using the most exact approximation of equality between two objects + * to keep the chance of false positives to a minimum. + * `JSON.stringify` is not designed to be used for this purpose; objects may + * have ambiguous `toJSON()` implementations that would influence the test. + * + * @param {*} actual + * Test subject to be evaluated as equivalent to ``expected``, including nested properties. + * @param {*} expected + * Test reference to evaluate against ``actual``. + * @param {String} [message] + * Short explanation of the expected result. + */ +Assert.prototype.deepEqual = function deepEqual(actual, expected, message) { + this.report( + !ObjectUtils.deepEqual(actual, expected), + actual, + expected, + message, + "deepEqual", + false + ); +}; + +/** + * 8. The non-equivalence assertion tests for any deep inequality. + * assert.notDeepEqual(actual, expected, message_opt); + * + * @param {*} actual + * Test subject to be evaluated as NOT equivalent to ``expected``, including nested + * properties. + * @param {*} expected + * Test reference to evaluate against ``actual``. + * @param {String} [message] + * Short explanation of the expected result. + */ +Assert.prototype.notDeepEqual = function notDeepEqual( + actual, + expected, + message +) { + this.report( + ObjectUtils.deepEqual(actual, expected), + actual, + expected, + message, + "notDeepEqual", + false + ); +}; + +/** + * 9. The strict equality assertion tests strict equality, as determined by ===. + * ``assert.strictEqual(actual, expected, message_opt);`` + * + * @param {*} actual + * Test subject to be evaluated as strictly equivalent to ``expected``. + * @param {*} expected + * Test reference to evaluate against ``actual``. + * @param {String} [message] + * Short explanation of the expected result. + */ +Assert.prototype.strictEqual = function strictEqual(actual, expected, message) { + this.report(actual !== expected, actual, expected, message, "==="); +}; + +/** + * 10. The strict non-equality assertion tests for strict inequality, as + * determined by !==. ``assert.notStrictEqual(actual, expected, message_opt);`` + * + * @param {*} actual + * Test subject to be evaluated as NOT strictly equivalent to ``expected``. + * @param {*} expected + * Test reference to evaluate against ``actual``. + * @param {String} [message] + * Short explanation of the expected result. + */ +Assert.prototype.notStrictEqual = function notStrictEqual( + actual, + expected, + message +) { + this.report(actual === expected, actual, expected, message, "!=="); +}; + +function checkExpectedArgument(instance, funcName, expected) { + if (!expected) { + instance.ok( + false, + `Error: The 'expected' argument was not supplied to Assert.${funcName}()` + ); + } + + if ( + !instanceOf(expected, "RegExp") && + typeof expected !== "function" && + typeof expected !== "object" + ) { + instance.ok( + false, + `Error: The 'expected' argument to Assert.${funcName}() must be a RegExp, function or an object` + ); + } +} + +function expectedException(actual, expected) { + if (!actual || !expected) { + return false; + } + + if (instanceOf(expected, "RegExp")) { + return expected.test(actual); + // We need to guard against the right hand parameter of "instanceof" lacking + // the "prototype" property, which is true of arrow functions in particular. + } else if ( + !(typeof expected === "function" && !expected.prototype) && + actual instanceof expected + ) { + return true; + } else if (expected.call({}, actual) === true) { + return true; + } + + return false; +} + +/** + * 11. Expected to throw an error: + * assert.throws(block, Error_opt, message_opt); + * + * Example: + * ```js + * // The following will verify that an error of type TypeError was thrown: + * Assert.throws(() => testBody(), TypeError); + * // The following will verify that an error was thrown with an error message matching "hello": + * Assert.throws(() => testBody(), /hello/); + * ``` + * + * @param {Function} block + * Function to evaluate and catch eventual thrown errors. + * @param {RegExp|Function} expected + * This parameter can be either a RegExp or a function. The function is + * either the error type's constructor, or it's a method that returns + * a boolean that describes the test outcome. + * @param {String} [message] + * Short explanation of the expected result. + */ +Assert.prototype.throws = function (block, expected, message) { + checkExpectedArgument(this, "throws", expected); + + // `true` if we realize that we have added an + // error to `ChromeUtils.recentJSDevError` and + // that we probably need to clean it up. + let cleanupRecentJSDevError = false; + if ("recentJSDevError" in ChromeUtils) { + // Check that we're in a build of Firefox that supports + // the `recentJSDevError` mechanism (i.e. Nightly build). + if (ChromeUtils.recentJSDevError === undefined) { + // There was no previous error, so if we throw + // an error here, we may need to clean it up. + cleanupRecentJSDevError = true; + } + } + + let actual; + + try { + block(); + } catch (e) { + actual = e; + } + + message = + (expected.name ? " (" + expected.name + ")." : ".") + + (message ? " " + message : "."); + + if (!actual) { + this.report(true, actual, expected, "Missing expected exception" + message); + } + + if (actual && !expectedException(actual, expected)) { + throw actual; + } + + this.report(false, expected, expected, message); + + // Make sure that we don't cause failures for JS Dev Errors that + // were expected, typically for tests that attempt to check + // that we react properly to TypeError, ReferenceError, SyntaxError. + if (cleanupRecentJSDevError) { + let recentJSDevError = ChromeUtils.recentJSDevError; + if (recentJSDevError) { + if (expectedException(recentJSDevError)) { + ChromeUtils.clearRecentJSDevError(); + } + } + } +}; + +/** + * A promise that is expected to reject: + * assert.rejects(promise, expected, message); + * + * @param {Promise} promise + * A promise that is expected to reject. + * @param {?} [expected] + * Test reference to evaluate against the rejection result. + * @param {String} [message] + * Short explanation of the expected result. + */ +Assert.prototype.rejects = function (promise, expected, message) { + checkExpectedArgument(this, "rejects", expected); + const operator = undefined; // Should we use "rejects" here? + const stack = Components.stack; + return new Promise((resolve, reject) => { + return promise + .then( + () => { + this.report( + true, + null, + expected, + "Missing expected exception " + message, + operator, + true, + stack + ); + // this.report() above should raise an AssertionError. If _reporter + // has been overridden and doesn't throw an error, just resolve. + // Otherwise we'll have a never-resolving promise that got stuck. + resolve(); + }, + err => { + if (!expectedException(err, expected)) { + // TODO bug 1480075: Should report error instead of rejecting. + reject(err); + return; + } + this.report(false, err, expected, message, operator, truncate, stack); + resolve(); + } + ) + .catch(reject); + }); +}; + +function compareNumbers(expression, lhs, rhs, message, operator) { + let lhsIsNumber = typeof lhs == "number" && !Number.isNaN(lhs); + let rhsIsNumber = typeof rhs == "number" && !Number.isNaN(rhs); + + if (lhsIsNumber && rhsIsNumber) { + this.report(expression, lhs, rhs, message, operator); + return; + } + let lhsIsDate = + typeof lhs == "object" && lhs.constructor.name == "Date" && !isNaN(lhs); + let rhsIsDate = + typeof rhs == "object" && rhs.constructor.name == "Date" && !isNaN(rhs); + if (lhsIsDate && rhsIsDate) { + this.report(expression, lhs, rhs, message, operator); + return; + } + + let errorMessage; + if (!lhsIsNumber && !rhsIsNumber && !lhsIsDate && !rhsIsDate) { + errorMessage = `Neither '${lhs}' nor '${rhs}' are numbers or dates.`; + } else if ((lhsIsNumber && rhsIsDate) || (lhsIsDate && rhsIsNumber)) { + errorMessage = `'${lhsIsNumber ? lhs : rhs}' is a number and '${ + rhsIsDate ? rhs : lhs + }' is a date.`; + } else { + errorMessage = `'${ + lhsIsNumber || lhsIsDate ? rhs : lhs + }' is not a number or date.`; + } + this.report(true, lhs, rhs, errorMessage); +} + +/** + * The lhs must be greater than the rhs. + * assert.greater(lhs, rhs, message_opt); + * + * @param {Number} lhs + * The left-hand side value. + * @param {Number} rhs + * The right-hand side value. + * @param {String} [message] + * Short explanation of the comparison result. + */ +Assert.prototype.greater = function greater(lhs, rhs, message) { + compareNumbers.call(this, lhs <= rhs, lhs, rhs, message, ">"); +}; + +/** + * The lhs must be greater than or equal to the rhs. + * assert.greaterOrEqual(lhs, rhs, message_opt); + * + * @param {Number} [lhs] + * The left-hand side value. + * @param {Number} [rhs] + * The right-hand side value. + * @param {String} [message] + * Short explanation of the comparison result. + */ +Assert.prototype.greaterOrEqual = function greaterOrEqual(lhs, rhs, message) { + compareNumbers.call(this, lhs < rhs, lhs, rhs, message, ">="); +}; + +/** + * The lhs must be less than the rhs. + * assert.less(lhs, rhs, message_opt); + * + * @param {Number} [lhs] + * The left-hand side value. + * @param {Number} [rhs] + * The right-hand side value. + * @param {String} [message] + * Short explanation of the comparison result. + */ +Assert.prototype.less = function less(lhs, rhs, message) { + compareNumbers.call(this, lhs >= rhs, lhs, rhs, message, "<"); +}; + +/** + * The lhs must be less than or equal to the rhs. + * assert.lessOrEqual(lhs, rhs, message_opt); + * + * @param {Number} [lhs] + * The left-hand side value. + * @param {Number} [rhs] + * The right-hand side value. + * @param {String} [message] + * Short explanation of the comparison result. + */ +Assert.prototype.lessOrEqual = function lessOrEqual(lhs, rhs, message) { + compareNumbers.call(this, lhs > rhs, lhs, rhs, message, "<="); +}; + +/** + * The lhs must be a string that matches the rhs regular expression. + * rhs can be specified either as a string or a RegExp object. If specified as a + * string it will be interpreted as a regular expression so take care to escape + * special characters such as "?" or "(" if you need the actual characters. + * + * @param {String} lhs + * The string to be tested. + * @param {String|RegExp} rhs + * The regular expression that the string will be tested with. + * Note that if passed as a string, this will be interpreted. + * as a regular expression. + * @param {String} [message] + * Short explanation of the comparison result. + */ +Assert.prototype.stringMatches = function stringMatches(lhs, rhs, message) { + if (typeof rhs != "string" && !instanceOf(rhs, "RegExp")) { + this.report( + true, + lhs, + String(rhs), + `Expected a string or a RegExp for rhs, but "${rhs}" isn't a string or a RegExp object.` + ); + return; + } + + if (typeof lhs != "string") { + this.report( + true, + lhs, + String(rhs), + `Expected a string for lhs, but "${lhs}" isn't a string.` + ); + return; + } + + if (typeof rhs == "string") { + try { + rhs = new RegExp(rhs); + } catch { + this.report( + true, + lhs, + rhs, + `Expected a valid regular expression for rhs, but "${rhs}" isn't one.` + ); + return; + } + } + + const isCorrect = rhs.test(lhs); + this.report(!isCorrect, lhs, rhs.toString(), message, "matches"); +}; + +/** + * The lhs must be a string that contains the rhs string. + * + * @param {String} lhs + * The string to be tested (haystack). + * @param {String} rhs + * The string to be found (needle). + * @param {String} [message] + * Short explanation of the expected result. + */ +Assert.prototype.stringContains = function stringContains(lhs, rhs, message) { + if (typeof lhs != "string" || typeof rhs != "string") { + this.report( + true, + lhs, + rhs, + `Expected a string for both lhs and rhs, but either "${lhs}" or "${rhs}" is not a string.` + ); + } + + const isCorrect = lhs.includes(rhs); + this.report(!isCorrect, lhs, rhs, message, "includes"); +}; diff --git a/testing/modules/CoverageUtils.sys.mjs b/testing/modules/CoverageUtils.sys.mjs new file mode 100644 index 0000000000..a19432305a --- /dev/null +++ b/testing/modules/CoverageUtils.sys.mjs @@ -0,0 +1,211 @@ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +import { addDebuggerToGlobal } from "resource://gre/modules/jsdebugger.sys.mjs"; + +// eslint-disable-next-line mozilla/reject-globalThis-modification +addDebuggerToGlobal(globalThis); + +/** + * Records coverage for each test by way of the js debugger. + */ +export var CoverageCollector = function (prefix) { + this._prefix = prefix; + this._dbg = new Debugger(); + this._dbg.collectCoverageInfo = true; + this._dbg.addAllGlobalsAsDebuggees(); + this._scripts = this._dbg.findScripts(); + + this._dbg.onNewScript = script => { + this._scripts.push(script); + }; + + // Source -> coverage data; + this._allCoverage = {}; + this._encoder = new TextEncoder(); + + this._testIndex = 0; +}; + +CoverageCollector.prototype._getLinesCovered = function () { + let coveredLines = {}; + let currentCoverage = {}; + this._scripts.forEach(s => { + let scriptName = s.url; + let cov = s.getOffsetsCoverage(); + if (!cov) { + return; + } + + cov.forEach(covered => { + let { lineNumber, columnNumber, offset, count } = covered; + if (!count) { + return; + } + + if (!currentCoverage[scriptName]) { + currentCoverage[scriptName] = {}; + } + if (!this._allCoverage[scriptName]) { + this._allCoverage[scriptName] = {}; + } + + // NOTE: columnNumber is 1-origin. + let key = [lineNumber, columnNumber - 1, offset].join("#"); + if (!currentCoverage[scriptName][key]) { + currentCoverage[scriptName][key] = count; + } else { + currentCoverage[scriptName][key] += count; + } + }); + }); + + // Covered lines are determined by comparing every offset mentioned as of the + // the completion of a test to the last time we measured coverage. If an + // offset in a line is novel as of this test, or a count has increased for + // any offset on a particular line, that line must have been covered. + for (let scriptName in currentCoverage) { + for (let key in currentCoverage[scriptName]) { + if ( + !this._allCoverage[scriptName] || + !this._allCoverage[scriptName][key] || + this._allCoverage[scriptName][key] < currentCoverage[scriptName][key] + ) { + // eslint-disable-next-line no-unused-vars + let [lineNumber, colNumber, offset] = key.split("#"); + if (!coveredLines[scriptName]) { + coveredLines[scriptName] = new Set(); + } + coveredLines[scriptName].add(parseInt(lineNumber, 10)); + this._allCoverage[scriptName][key] = currentCoverage[scriptName][key]; + } + } + } + + return coveredLines; +}; + +CoverageCollector.prototype._getUncoveredLines = function () { + let uncoveredLines = {}; + this._scripts.forEach(s => { + let scriptName = s.url; + let scriptOffsets = s.getAllOffsets(); + + if (!uncoveredLines[scriptName]) { + uncoveredLines[scriptName] = new Set(); + } + + // Get all lines in the script + scriptOffsets.forEach(function (element, index) { + if (!element) { + return; + } + uncoveredLines[scriptName].add(index); + }); + }); + + // For all covered lines, delete their entry + for (let scriptName in this._allCoverage) { + for (let key in this._allCoverage[scriptName]) { + // eslint-disable-next-line no-unused-vars + let [lineNumber, columnNumber, offset] = key.split("#"); + uncoveredLines[scriptName].delete(parseInt(lineNumber, 10)); + } + } + + return uncoveredLines; +}; + +CoverageCollector.prototype._getMethodNames = function () { + let methodNames = {}; + this._scripts.forEach(s => { + let method = s.displayName; + // If the method name is undefined, we return early + if (!method) { + return; + } + + let scriptName = s.url; + let tempMethodCov = []; + let scriptOffsets = s.getAllOffsets(); + + if (!methodNames[scriptName]) { + methodNames[scriptName] = {}; + } + + /** + * Get all lines contained within the method and + * push a record of the form: + * : + */ + scriptOffsets.forEach(function (element, index) { + if (!element) { + return; + } + tempMethodCov.push(index); + }); + methodNames[scriptName][method] = tempMethodCov; + }); + + return methodNames; +}; + +/** + * Records lines covered since the last time coverage was recorded, + * associating them with the given test name. The result is written + * to a json file in a specified directory. + */ +CoverageCollector.prototype.recordTestCoverage = function (testName) { + dump("Collecting coverage for: " + testName + "\n"); + let rawLines = this._getLinesCovered(testName); + let methods = this._getMethodNames(); + let uncoveredLines = this._getUncoveredLines(); + let result = []; + let versionControlBlock = { version: 1.0 }; + result.push(versionControlBlock); + + for (let scriptName in rawLines) { + let rec = { + testUrl: testName, + sourceFile: scriptName, + methods: {}, + covered: [], + uncovered: [], + }; + + if ( + typeof methods[scriptName] != "undefined" && + methods[scriptName] != null + ) { + for (let [methodName, methodLines] of Object.entries( + methods[scriptName] + )) { + rec.methods[methodName] = methodLines; + } + } + + for (let line of rawLines[scriptName]) { + rec.covered.push(line); + } + + for (let line of uncoveredLines[scriptName]) { + rec.uncovered.push(line); + } + + result.push(rec); + } + let path = this._prefix + "/jscov_" + Date.now() + ".json"; + dump("Writing coverage to: " + path + "\n"); + return IOUtils.writeUTF8(path, JSON.stringify(result, undefined, 2), { + tmpPath: `${path}.tmp`, + }); +}; + +/** + * Tear down the debugger after all tests are complete. + */ +CoverageCollector.prototype.finalize = function () { + this._dbg.removeAllDebuggees(); + this._dbg.enabled = false; +}; diff --git a/testing/modules/FileTestUtils.sys.mjs b/testing/modules/FileTestUtils.sys.mjs new file mode 100644 index 0000000000..acf33737f3 --- /dev/null +++ b/testing/modules/FileTestUtils.sys.mjs @@ -0,0 +1,126 @@ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +/** + * Provides testing functions dealing with local files and their contents. + */ + +import { DownloadPaths } from "resource://gre/modules/DownloadPaths.sys.mjs"; +import { FileUtils } from "resource://gre/modules/FileUtils.sys.mjs"; + +import { Assert } from "resource://testing-common/Assert.sys.mjs"; + +let gFileCounter = 1; +let gPathsToRemove = []; + +export var FileTestUtils = { + /** + * Returns a reference to a temporary file that is guaranteed not to exist and + * to have never been created before. If a file or a directory with this name + * is created by the test, it will be deleted when all tests terminate. + * + * @param suggestedName [optional] + * Any extension on this template file name will be preserved. If this + * is unspecified, the returned file name will have the generic ".dat" + * extension, which may indicate either a binary or a text data file. + * + * @return nsIFile pointing to a non-existent file in a temporary directory. + * + * @note It is not enough to delete the file if it exists, or to delete the + * file after calling nsIFile.createUnique, because on Windows the + * delete operation in the file system may still be pending, preventing + * a new file with the same name to be created. + */ + getTempFile(suggestedName = "test.dat") { + // Prepend a serial number to the extension in the suggested leaf name. + let [base, ext] = DownloadPaths.splitBaseNameAndExtension(suggestedName); + let leafName = base + "-" + gFileCounter + ext; + gFileCounter++; + + // Get a file reference under the temporary directory for this test file. + let file = this._globalTemporaryDirectory.clone(); + file.append(leafName); + Assert.ok(!file.exists(), "Sanity check the temporary file doesn't exist."); + + // Since directory iteration on Windows may not see files that have just + // been created, keep track of the known file names to be removed. + gPathsToRemove.push(file.path); + return file; + }, + + /** + * Attemps to remove the given file or directory recursively, in a way that + * works even on Windows, where race conditions may occur in the file system + * when creating and removing files at the pace of the test suites. + * + * The function may fail silently if access is denied. This means that it + * should only be used to clean up temporary files, rather than for cases + * where the removal is part of a test and must be guaranteed. + * + * @param path + * String representing the path to remove. + */ + async tolerantRemove(path) { + try { + await IOUtils.remove(path, { recursive: true }); + } catch (ex) { + // On Windows, we may get an access denied error instead of a no such file + // error if the file existed before, and was recently deleted. There is no + // way to distinguish this from an access list issue because checking for + // the file existence would also result in the same error. + if ( + !DOMException.isInstance(ex) || + ex.name !== "NotFoundError" || + ex.name !== "NotAllowedError" + ) { + throw ex; + } + } + }, +}; + +/** + * Returns a reference to a global temporary directory that will be deleted + * when all tests terminate. + */ +ChromeUtils.defineLazyGetter( + FileTestUtils, + "_globalTemporaryDirectory", + function () { + // While previous test runs should have deleted their temporary directories, + // on Windows they might still be pending deletion on the physical file + // system. This makes a simple nsIFile.createUnique call unreliable, and we + // have to use a random number to make a collision unlikely. + let randomNumber = Math.floor(Math.random() * 1000000); + let dir = new FileUtils.File( + PathUtils.join(PathUtils.tempDir, `testdir-${randomNumber}`) + ); + dir.createUnique(Ci.nsIFile.DIRECTORY_TYPE, FileUtils.PERMS_DIRECTORY); + + // We need to run this *after* the profile-before-change phase because + // otherwise we can race other shutdown blockers who have created files in + // our temporary directory. This can cause our shutdown blocker to fail due + // to, e.g., JSONFile attempting to flush its contents to disk while we are + // trying to delete the file. + + IOUtils.sendTelemetry.addBlocker("Removing test files", async () => { + // Remove the files we know about first. + for (let path of gPathsToRemove) { + await FileTestUtils.tolerantRemove(path); + } + + if (!(await IOUtils.exists(dir.path))) { + return; + } + + // Detect any extra files, like the ".part" files of downloads. + for (const child of await IOUtils.getChildren(dir.path)) { + await FileTestUtils.tolerantRemove(child); + } + // This will fail if any test leaves inaccessible files behind. + await IOUtils.remove(dir.path, { recursive: false }); + }); + return dir; + } +); diff --git a/testing/modules/MockRegistrar.sys.mjs b/testing/modules/MockRegistrar.sys.mjs new file mode 100644 index 0000000000..95dd070a2f --- /dev/null +++ b/testing/modules/MockRegistrar.sys.mjs @@ -0,0 +1,126 @@ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +const Cm = Components.manager; + +export var MockRegistrar = Object.freeze({ + _registeredComponents: new Map(), + _originalCIDs: new Map(), + get registrar() { + return Cm.QueryInterface(Ci.nsIComponentRegistrar); + }, + + /** + * Register a mock to override target interfaces. + * The target interface may be accessed through _genuine property of the mock. + * If you register multiple mocks to the same contract ID, you have to call + * unregister in reverse order. Otherwise the previous factory will not be + * restored. + * + * @param contractID The contract ID of the interface which is overridden by + the mock. + * e.g. "@mozilla.org/file/directory_service;1" + * @param mock An object which implements interfaces for the contract ID. + * @param args An array which is passed in the constructor of mock. + * + * @return The CID of the mock. + */ + register(contractID, mock, args) { + let originalCID; + let originalFactory; + try { + originalCID = this._originalCIDs.get(contractID); + if (!originalCID) { + originalCID = this.registrar.contractIDToCID(contractID); + this._originalCIDs.set(contractID, originalCID); + } + + originalFactory = Cm.getClassObject(originalCID, Ci.nsIFactory); + } catch (e) { + // There's no original factory. Ignore and just register the new + // one. + } + + let cid = Services.uuid.generateUUID(); + + let factory = { + createInstance(iid) { + let wrappedMock; + if (mock.prototype && mock.prototype.constructor) { + wrappedMock = Object.create(mock.prototype); + mock.apply(wrappedMock, args); + } else if (typeof mock == "function") { + wrappedMock = mock(); + } else { + wrappedMock = mock; + } + + if (originalFactory) { + try { + let genuine = originalFactory.createInstance(iid); + wrappedMock._genuine = genuine; + } catch (ex) { + console.error( + "MockRegistrar: Creating original instance failed", + ex + ); + } + } + + return wrappedMock.QueryInterface(iid); + }, + QueryInterface: ChromeUtils.generateQI(["nsIFactory"]), + }; + + this.registrar.registerFactory( + cid, + "A Mock for " + contractID, + contractID, + factory + ); + + this._registeredComponents.set(cid, { + contractID, + factory, + originalCID, + }); + + return cid; + }, + + /** + * Unregister the mock. + * + * @param cid The CID of the mock. + */ + unregister(cid) { + let component = this._registeredComponents.get(cid); + if (!component) { + return; + } + + this.registrar.unregisterFactory(cid, component.factory); + if (component.originalCID) { + // Passing `null` for the factory re-maps the contract ID to the + // entry for its original CID. + this.registrar.registerFactory( + component.originalCID, + "", + component.contractID, + null + ); + } + + this._registeredComponents.delete(cid); + }, + + /** + * Unregister all registered mocks. + */ + unregisterAll() { + for (let cid of this._registeredComponents.keys()) { + this.unregister(cid); + } + }, +}); diff --git a/testing/modules/MockRegistry.sys.mjs b/testing/modules/MockRegistry.sys.mjs new file mode 100644 index 0000000000..e9351e576d --- /dev/null +++ b/testing/modules/MockRegistry.sys.mjs @@ -0,0 +1,145 @@ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +import { MockRegistrar } from "resource://testing-common/MockRegistrar.sys.mjs"; + +export class MockRegistry { + constructor() { + // Three level structure of Maps pointing to Maps pointing to Maps + // this.roots is the top of the structure and has ROOT_KEY_* values + // as keys. Maps at the second level are the values of the first + // level Map, they have registry keys (also called paths) as keys. + // Third level maps are the values in second level maps, they have + // map registry names to corresponding values (which in this implementation + // are always strings). + this.roots = new Map([ + [Ci.nsIWindowsRegKey.ROOT_KEY_LOCAL_MACHINE, new Map()], + [Ci.nsIWindowsRegKey.ROOT_KEY_CURRENT_USER, new Map()], + [Ci.nsIWindowsRegKey.ROOT_KEY_CLASSES_ROOT, new Map()], + ]); + + let registry = this; + + /** + * This is a mock nsIWindowsRegistry implementation. It only implements a + * subset of the interface used in tests. In particular, only values + * of type string are supported. + */ + function MockWindowsRegKey() {} + MockWindowsRegKey.prototype = { + values: null, + + // --- Overridden nsISupports interface functions --- + QueryInterface: ChromeUtils.generateQI(["nsIWindowsRegKey"]), + + // --- Overridden nsIWindowsRegKey interface functions --- + open(root, path, mode) { + let rootKey = registry.getRoot(root); + if (!rootKey.has(path)) { + rootKey.set(path, new Map()); + } + this.values = rootKey.get(path); + }, + + close() { + this.values = null; + }, + + get valueCount() { + if (!this.values) { + throw Components.Exception("", Cr.NS_ERROR_FAILURE); + } + return this.values.size; + }, + + hasValue(name) { + if (!this.values) { + return false; + } + return this.values.has(name); + }, + + getValueType(name) { + return Ci.nsIWindowsRegKey.TYPE_STRING; + }, + + getValueName(index) { + if (!this.values || index >= this.values.size) { + throw Components.Exception("", Cr.NS_ERROR_FAILURE); + } + let names = Array.from(this.values.keys()); + return names[index]; + }, + + readStringValue(name) { + if (!this.values) { + throw new Error("invalid registry path"); + } + return this.values.get(name); + }, + }; + + // See bug 1688838 - nsNotifyAddrListener::CheckAdaptersAddresses might + // attempt to use the registry off the main thread, so we disable that + // feature while the mock registry is active. + this.oldSuffixListPref = Services.prefs.getBoolPref( + "network.notify.dnsSuffixList" + ); + Services.prefs.setBoolPref("network.notify.dnsSuffixList", false); + + this.oldCheckForProxiesPref = Services.prefs.getBoolPref( + "network.notify.checkForProxies" + ); + Services.prefs.setBoolPref("network.notify.checkForProxies", false); + + this.oldCheckForNRPTPref = Services.prefs.getBoolPref( + "network.notify.checkForNRPT" + ); + Services.prefs.setBoolPref("network.notify.checkForNRPT", false); + + this.cid = MockRegistrar.register( + "@mozilla.org/windows-registry-key;1", + MockWindowsRegKey + ); + } + + shutdown() { + MockRegistrar.unregister(this.cid); + Services.prefs.setBoolPref( + "network.notify.dnsSuffixList", + this.oldSuffixListPref + ); + Services.prefs.setBoolPref( + "network.notify.checkForProxies", + this.oldCheckForProxiesPref + ); + Services.prefs.setBoolPref( + "network.notify.checkForNRPT", + this.oldCheckForNRPTPref + ); + this.cid = null; + } + + getRoot(root) { + if (!this.roots.has(root)) { + throw new Error(`No such root ${root}`); + } + return this.roots.get(root); + } + + setValue(root, path, name, value) { + let rootKey = this.getRoot(root); + + if (!rootKey.has(path)) { + rootKey.set(path, new Map()); + } + + let pathmap = rootKey.get(path); + if (value == null) { + pathmap.delete(name); + } else { + pathmap.set(name, value); + } + } +} diff --git a/testing/modules/Sinon.sys.mjs b/testing/modules/Sinon.sys.mjs new file mode 100644 index 0000000000..d4edb4bba9 --- /dev/null +++ b/testing/modules/Sinon.sys.mjs @@ -0,0 +1,40 @@ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +// ================================================ +// Load mocking/stubbing library sinon +// docs: http://sinonjs.org/releases/v7.2.7/ +import { + clearInterval, + clearTimeout, + setInterval, + setIntervalWithTarget, + setTimeout, + setTimeoutWithTarget, +} from "resource://gre/modules/Timer.sys.mjs"; + +const obj = { + global: { + clearInterval, + clearTimeout, + setInterval, + setIntervalWithTarget, + setTimeout, + setTimeoutWithTarget, + Date, + }, + clearInterval, + clearTimeout, + setInterval, + setIntervalWithTarget, + setTimeout, + setTimeoutWithTarget, +}; +Services.scriptloader.loadSubScript( + "resource://testing-common/sinon-7.2.7.js", + obj +); + +export const sinon = obj.global.sinon; +// ================================================ diff --git a/testing/modules/StructuredLog.sys.mjs b/testing/modules/StructuredLog.sys.mjs new file mode 100644 index 0000000000..fa569e3409 --- /dev/null +++ b/testing/modules/StructuredLog.sys.mjs @@ -0,0 +1,304 @@ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +/** + * TestLogger: Logger class generating messages compliant with the + * structured logging protocol for tests exposed by mozlog + * + * @param {string} name + * The name of the logger to instantiate. + * @param {function} [dumpFun] + * An underlying function to be used to log raw messages. This function + * will receive the complete serialized json string to log. + * @param {object} [scope] + * The scope that the dumpFun is loaded in, so that messages are cloned + * into that scope before passing them. + */ +export class StructuredLogger { + name = null; + #dumpFun = null; + #dumpScope = null; + + constructor(name, dumpFun = dump, scope = null) { + this.name = name; + this.#dumpFun = dumpFun; + this.#dumpScope = scope; + } + + testStart(test) { + var data = { test: this.#testId(test) }; + this.logData("test_start", data); + } + + testStatus( + test, + subtest, + status, + expected = "PASS", + message = null, + stack = null, + extra = null + ) { + if (subtest === null || subtest === undefined) { + // Fix for assertions that don't pass in a name + subtest = "undefined assertion name"; + } + + var data = { + test: this.#testId(test), + subtest, + status, + }; + + // handle case: known fail + if (expected === status && status != "SKIP") { + data.status = "PASS"; + } + if (expected != status && status != "SKIP") { + data.expected = expected; + } + if (message !== null) { + data.message = String(message); + } + if (stack !== null) { + data.stack = stack; + } + if (extra !== null) { + data.extra = extra; + } + + this.logData("test_status", data); + } + + testEnd( + test, + status, + expected = "OK", + message = null, + stack = null, + extra = null + ) { + var data = { test: this.#testId(test), status }; + + // handle case: known fail + if (expected === status && status != "SKIP") { + data.status = "OK"; + } + if (expected != status && status != "SKIP") { + data.expected = expected; + } + if (message !== null) { + data.message = String(message); + } + if (stack !== null) { + data.stack = stack; + } + if (extra !== null) { + data.extra = extra; + } + + this.logData("test_end", data); + } + + assertionCount(test, count, minExpected = 0, maxExpected = 0) { + var data = { + test: this.#testId(test), + min_expected: minExpected, + max_expected: maxExpected, + count, + }; + + this.logData("assertion_count", data); + } + + suiteStart( + ids, + name = null, + runinfo = null, + versioninfo = null, + deviceinfo = null, + extra = null + ) { + Object.keys(ids).map(function (manifest) { + ids[manifest] = ids[manifest].map(x => this.#testId(x)); + }, this); + var data = { tests: ids }; + + if (name !== null) { + data.name = name; + } + + if (runinfo !== null) { + data.runinfo = runinfo; + } + + if (versioninfo !== null) { + data.versioninfo = versioninfo; + } + + if (deviceinfo !== null) { + data.deviceinfo = deviceinfo; + } + + if (extra !== null) { + data.extra = extra; + } + + this.logData("suite_start", data); + } + + suiteEnd(extra = null) { + var data = {}; + + if (extra !== null) { + data.extra = extra; + } + + this.logData("suite_end", data); + } + + /** + * Unstructured logging functions. The "extra" parameter can always by used to + * log suite specific data. If a "stack" field is provided it is logged at the + * top level of the data object for the benefit of mozlog's formatters. + */ + log(level, message, extra = null) { + var data = { + level, + message: String(message), + }; + + if (extra !== null) { + data.extra = extra; + if ("stack" in extra) { + data.stack = extra.stack; + } + } + + this.logData("log", data); + } + + debug(message, extra = null) { + this.log("DEBUG", message, extra); + } + + info(message, extra = null) { + this.log("INFO", message, extra); + } + + warning(message, extra = null) { + this.log("WARNING", message, extra); + } + + error(message, extra = null) { + this.log("ERROR", message, extra); + } + + critical(message, extra = null) { + this.log("CRITICAL", message, extra); + } + + processOutput(thread, message) { + this.logData("process_output", { + message, + thread, + }); + } + + logData(action, data = {}) { + var allData = { + action, + time: Date.now(), + thread: null, + pid: null, + source: this.name, + }; + + for (var field in data) { + allData[field] = data[field]; + } + + if (this.#dumpScope) { + this.#dumpFun(Cu.cloneInto(allData, this.#dumpScope)); + } else { + this.#dumpFun(allData); + } + } + + #testId(test) { + if (Array.isArray(test)) { + return test.join(" "); + } + return test; + } +} + +/** + * StructuredFormatter: Formatter class turning structured messages + * into human-readable messages. + */ +export class StructuredFormatter { + // The time at which the whole suite of tests started. + #suiteStartTime = null; + + #testStartTimes = new Map(); + + log(message) { + return message.message; + } + + suite_start(message) { + this.#suiteStartTime = message.time; + return "SUITE-START | Running " + message.tests.length + " tests"; + } + + test_start(message) { + this.#testStartTimes.set(message.test, new Date().getTime()); + return "TEST-START | " + message.test; + } + + test_status(message) { + var statusInfo = + message.test + + " | " + + message.subtest + + (message.message ? " | " + message.message : ""); + if (message.expected) { + return ( + "TEST-UNEXPECTED-" + + message.status + + " | " + + statusInfo + + " - expected: " + + message.expected + ); + } + return "TEST-" + message.status + " | " + statusInfo; + } + + test_end(message) { + var startTime = this.#testStartTimes.get(message.test); + this.#testStartTimes.delete(message.test); + var statusInfo = + message.test + (message.message ? " | " + String(message.message) : ""); + var result; + if (message.expected) { + result = + "TEST-UNEXPECTED-" + + message.status + + " | " + + statusInfo + + " - expected: " + + message.expected; + } else { + return "TEST-" + message.status + " | " + statusInfo; + } + result = result + " | took " + message.time - startTime + "ms"; + return result; + } + + suite_end(message) { + return "SUITE-END | took " + message.time - this.#suiteStartTime + "ms"; + } +} diff --git a/testing/modules/TestUtils.sys.mjs b/testing/modules/TestUtils.sys.mjs new file mode 100644 index 0000000000..51030f5fbc --- /dev/null +++ b/testing/modules/TestUtils.sys.mjs @@ -0,0 +1,381 @@ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +/** + * Contains a limited number of testing functions that are commonly used in a + * wide variety of situations, for example waiting for an event loop tick or an + * observer notification. + * + * More complex functions are likely to belong to a separate test-only module. + * Examples include Assert.sys.mjs for generic assertions, FileTestUtils.sys.mjs + * to work with local files and their contents, and BrowserTestUtils.sys.mjs to + * work with browser windows and tabs. + * + * Individual components also offer testing functions to other components, for + * example LoginTestUtils.jsm. + */ + +import { clearTimeout, setTimeout } from "resource://gre/modules/Timer.sys.mjs"; + +const ConsoleAPIStorage = Cc["@mozilla.org/consoleAPI-storage;1"].getService( + Ci.nsIConsoleAPIStorage +); + +/** + * TestUtils provides generally useful test utilities. + * It can be used from mochitests, browser mochitests and xpcshell tests alike. + * + * @class + */ +export var TestUtils = { + executeSoon(callbackFn) { + Services.tm.dispatchToMainThread(callbackFn); + }, + + waitForTick() { + return new Promise(resolve => this.executeSoon(resolve)); + }, + + /** + * Waits for a console message matching the specified check function to be + * observed. + * + * @param {function} checkFn [optional] + * Called with the message as its argument, should return true if the + * notification is the expected one, or false if it should be ignored + * and listening should continue. + * + * @note Because this function is intended for testing, any error in checkFn + * will cause the returned promise to be rejected instead of waiting for + * the next notification, since this is probably a bug in the test. + * + * @return {Promise} + * @resolves The message from the observed notification. + */ + consoleMessageObserved(checkFn) { + return new Promise((resolve, reject) => { + let removed = false; + function observe(message) { + try { + if (checkFn && !checkFn(message)) { + return; + } + ConsoleAPIStorage.removeLogEventListener(observe); + // checkFn could reference objects that need to be destroyed before + // the end of the test, so avoid keeping a reference to it after the + // promise resolves. + checkFn = null; + removed = true; + + resolve(message); + } catch (ex) { + ConsoleAPIStorage.removeLogEventListener(observe); + checkFn = null; + removed = true; + reject(ex); + } + } + + ConsoleAPIStorage.addLogEventListener( + observe, + Cc["@mozilla.org/systemprincipal;1"].createInstance(Ci.nsIPrincipal) + ); + + TestUtils.promiseTestFinished?.then(() => { + if (removed) { + return; + } + + ConsoleAPIStorage.removeLogEventListener(observe); + let text = + "Console message observer not removed before the end of test"; + reject(text); + }); + }); + }, + + /** + * Listens for any console messages (logged via console.*) and returns them + * when the returned function is called. + * + * @returns {function} + * Returns an async function that when called will wait for a tick, then stop + * listening to any more console messages and finally will return the + * messages that have been received. + */ + listenForConsoleMessages() { + let messages = []; + function observe(message) { + messages.push(message); + } + + ConsoleAPIStorage.addLogEventListener( + observe, + Cc["@mozilla.org/systemprincipal;1"].createInstance(Ci.nsIPrincipal) + ); + + return async () => { + await TestUtils.waitForTick(); + ConsoleAPIStorage.removeLogEventListener(observe); + return messages; + }; + }, + + /** + * Waits for the specified topic to be observed. + * + * @param {string} topic + * The topic to observe. + * @param {function} checkFn [optional] + * Called with (subject, data) as arguments, should return true if the + * notification is the expected one, or false if it should be ignored + * and listening should continue. If not specified, the first + * notification for the specified topic resolves the returned promise. + * + * @note Because this function is intended for testing, any error in checkFn + * will cause the returned promise to be rejected instead of waiting for + * the next notification, since this is probably a bug in the test. + * + * @return {Promise} + * @resolves The array [subject, data] from the observed notification. + */ + topicObserved(topic, checkFn) { + let startTime = Cu.now(); + return new Promise((resolve, reject) => { + let removed = false; + function observer(subject, topic, data) { + try { + if (checkFn && !checkFn(subject, data)) { + return; + } + Services.obs.removeObserver(observer, topic); + // checkFn could reference objects that need to be destroyed before + // the end of the test, so avoid keeping a reference to it after the + // promise resolves. + checkFn = null; + removed = true; + ChromeUtils.addProfilerMarker( + "TestUtils", + { startTime, category: "Test" }, + "topicObserved: " + topic + ); + resolve([subject, data]); + } catch (ex) { + Services.obs.removeObserver(observer, topic); + checkFn = null; + removed = true; + reject(ex); + } + } + Services.obs.addObserver(observer, topic); + + TestUtils.promiseTestFinished?.then(() => { + if (removed) { + return; + } + + Services.obs.removeObserver(observer, topic); + let text = topic + " observer not removed before the end of test"; + reject(text); + ChromeUtils.addProfilerMarker( + "TestUtils", + { startTime, category: "Test" }, + "topicObserved: " + text + ); + }); + }); + }, + + /** + * Waits for the specified preference to be change. + * + * @param {string} prefName + * The pref to observe. + * @param {function} checkFn [optional] + * Called with the new preference value as argument, should return true if the + * notification is the expected one, or false if it should be ignored + * and listening should continue. If not specified, the first + * notification for the specified topic resolves the returned promise. + * + * @note Because this function is intended for testing, any error in checkFn + * will cause the returned promise to be rejected instead of waiting for + * the next notification, since this is probably a bug in the test. + * + * @return {Promise} + * @resolves The value of the preference. + */ + waitForPrefChange(prefName, checkFn) { + return new Promise((resolve, reject) => { + Services.prefs.addObserver( + prefName, + function observer(subject, topic, data) { + try { + let prefValue = null; + switch (Services.prefs.getPrefType(prefName)) { + case Services.prefs.PREF_STRING: + prefValue = Services.prefs.getStringPref(prefName); + break; + case Services.prefs.PREF_INT: + prefValue = Services.prefs.getIntPref(prefName); + break; + case Services.prefs.PREF_BOOL: + prefValue = Services.prefs.getBoolPref(prefName); + break; + } + if (checkFn && !checkFn(prefValue)) { + return; + } + Services.prefs.removeObserver(prefName, observer); + resolve(prefValue); + } catch (ex) { + Services.prefs.removeObserver(prefName, observer); + reject(ex); + } + } + ); + }); + }, + + /** + * Takes a screenshot of an area and returns it as a data URL. + * + * @param eltOrRect {Element|Rect} + * The DOM node or rect ({left, top, width, height}) to screenshot. + * @param win {Window} + * The current window. + */ + screenshotArea(eltOrRect, win) { + if (Element.isInstance(eltOrRect)) { + eltOrRect = eltOrRect.getBoundingClientRect(); + } + let { left, top, width, height } = eltOrRect; + let canvas = win.document.createElementNS( + "http://www.w3.org/1999/xhtml", + "canvas" + ); + let ctx = canvas.getContext("2d"); + let ratio = win.devicePixelRatio; + canvas.width = width * ratio; + canvas.height = height * ratio; + ctx.scale(ratio, ratio); + ctx.drawWindow(win, left, top, width, height, "#fff"); + return canvas.toDataURL(); + }, + + /** + * Will poll a condition function until it returns true. + * + * @param condition + * A condition function that must return true or false. If the + * condition ever throws, this function fails and rejects the + * returned promise. The function can be an async function. + * @param msg + * A message used to describe the condition being waited for. + * This message will be used to reject the promise should the + * wait fail. It is also used to add a profiler marker. + * @param interval + * The time interval to poll the condition function. Defaults + * to 100ms. + * @param maxTries + * The number of times to poll before giving up and rejecting + * if the condition has not yet returned true. Defaults to 50 + * (~5 seconds for 100ms intervals) + * @return Promise + * Resolves with the return value of the condition function. + * Rejects if timeout is exceeded or condition ever throws. + * + * NOTE: This is intentionally not using setInterval, using setTimeout + * instead. setInterval is not promise-safe. + */ + waitForCondition(condition, msg, interval = 100, maxTries = 50) { + let startTime = Cu.now(); + return new Promise((resolve, reject) => { + let tries = 0; + let timeoutId = 0; + async function tryOnce() { + timeoutId = 0; + if (tries >= maxTries) { + msg += ` - timed out after ${maxTries} tries.`; + ChromeUtils.addProfilerMarker( + "TestUtils", + { startTime, category: "Test" }, + `waitForCondition - ${msg}` + ); + condition = null; + reject(msg); + return; + } + + let conditionPassed = false; + try { + conditionPassed = await condition(); + } catch (e) { + ChromeUtils.addProfilerMarker( + "TestUtils", + { startTime, category: "Test" }, + `waitForCondition - ${msg}` + ); + msg += ` - threw exception: ${e}`; + condition = null; + reject(msg); + return; + } + + if (conditionPassed) { + ChromeUtils.addProfilerMarker( + "TestUtils", + { startTime, category: "Test" }, + `waitForCondition succeeded after ${tries} retries - ${msg}` + ); + // Avoid keeping a reference to the condition function after the + // promise resolves, as this function could itself reference objects + // that should be GC'ed before the end of the test. + condition = null; + resolve(conditionPassed); + return; + } + tries++; + timeoutId = setTimeout(tryOnce, interval); + } + + TestUtils.promiseTestFinished?.then(() => { + if (!timeoutId) { + return; + } + + clearTimeout(timeoutId); + msg += " - still pending at the end of the test"; + ChromeUtils.addProfilerMarker( + "TestUtils", + { startTime, category: "Test" }, + `waitForCondition - ${msg}` + ); + reject("waitForCondition timer - " + msg); + }); + + TestUtils.executeSoon(tryOnce); + }); + }, + + shuffle(array) { + let results = []; + for (let i = 0; i < array.length; ++i) { + let randomIndex = Math.floor(Math.random() * (i + 1)); + results[i] = results[randomIndex]; + results[randomIndex] = array[i]; + } + return results; + }, + + assertPackagedBuild() { + const omniJa = Services.dirsvc.get("XCurProcD", Ci.nsIFile); + omniJa.append("omni.ja"); + if (!omniJa.exists()) { + throw new Error( + "This test requires a packaged build, " + + "run 'mach package' and then use --appname=dist" + ); + } + }, +}; diff --git a/testing/modules/XPCShellContentUtils.sys.mjs b/testing/modules/XPCShellContentUtils.sys.mjs new file mode 100644 index 0000000000..21ac5dbae4 --- /dev/null +++ b/testing/modules/XPCShellContentUtils.sys.mjs @@ -0,0 +1,479 @@ +/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */ +/* vim: set sts=2 sw=2 et tw=80: */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +import { ExtensionUtils } from "resource://gre/modules/ExtensionUtils.sys.mjs"; + +import { XPCOMUtils } from "resource://gre/modules/XPCOMUtils.sys.mjs"; + +// Windowless browsers can create documents that rely on XUL Custom Elements: +ChromeUtils.importESModule( + "resource://gre/modules/CustomElementsListener.sys.mjs" +); + +// Need to import ActorManagerParent.sys.mjs so that the actors are initialized +// before running extension XPCShell tests. +ChromeUtils.importESModule("resource://gre/modules/ActorManagerParent.sys.mjs"); + +const lazy = {}; + +ChromeUtils.defineESModuleGetters(lazy, { + ContentTask: "resource://testing-common/ContentTask.sys.mjs", + HttpServer: "resource://testing-common/httpd.sys.mjs", + SpecialPowersParent: "resource://testing-common/SpecialPowersParent.sys.mjs", + TestUtils: "resource://testing-common/TestUtils.sys.mjs", +}); + +XPCOMUtils.defineLazyServiceGetters(lazy, { + proxyService: [ + "@mozilla.org/network/protocol-proxy-service;1", + "nsIProtocolProxyService", + ], +}); + +const { promiseDocumentLoaded, promiseEvent, promiseObserved } = ExtensionUtils; + +var gRemoteContentScripts = Services.appinfo.browserTabsRemoteAutostart; +const REMOTE_CONTENT_SUBFRAMES = Services.appinfo.fissionAutostart; + +function frameScript() { + // We need to make sure that the ExtensionPolicy service has been initialized + // as it sets up the observers that inject extension content scripts. + Cc["@mozilla.org/addons/policy-service;1"].getService(); + + Services.obs.notifyObservers(this, "tab-content-frameloader-created"); + + // eslint-disable-next-line mozilla/balanced-listeners, no-undef + addEventListener( + "MozHeapMinimize", + () => { + Services.obs.notifyObservers(null, "memory-pressure", "heap-minimize"); + }, + true, + true + ); +} + +let kungFuDeathGrip = new Set(); +function promiseBrowserLoaded(browser, url, redirectUrl) { + url = url && Services.io.newURI(url); + redirectUrl = redirectUrl && Services.io.newURI(redirectUrl); + + return new Promise(resolve => { + const listener = { + QueryInterface: ChromeUtils.generateQI([ + "nsISupportsWeakReference", + "nsIWebProgressListener", + ]), + + onStateChange(webProgress, request, stateFlags, statusCode) { + request.QueryInterface(Ci.nsIChannel); + + let requestURI = + request.originalURI || + webProgress.DOMWindow.document.documentURIObject; + if ( + webProgress.isTopLevel && + (url?.equals(requestURI) || redirectUrl?.equals(requestURI)) && + stateFlags & Ci.nsIWebProgressListener.STATE_STOP + ) { + resolve(); + kungFuDeathGrip.delete(listener); + browser.removeProgressListener(listener); + } + }, + }; + + // addProgressListener only supports weak references, so we need to + // use one. But we also need to make sure it stays alive until we're + // done with it, so thunk away a strong reference to keep it alive. + kungFuDeathGrip.add(listener); + browser.addProgressListener( + listener, + Ci.nsIWebProgress.NOTIFY_STATE_WINDOW + ); + }); +} + +class ContentPage { + constructor( + remote = gRemoteContentScripts, + remoteSubframes = REMOTE_CONTENT_SUBFRAMES, + extension = null, + privateBrowsing = false, + userContextId = undefined + ) { + this.remote = remote; + + // If an extension has been passed, overwrite remote + // with extension.remote to be sure that the ContentPage + // will have the same remoteness of the extension. + if (extension) { + this.remote = extension.remote; + } + + this.remoteSubframes = this.remote && remoteSubframes; + this.extension = extension; + this.privateBrowsing = privateBrowsing; + this.userContextId = userContextId; + + this.browserReady = this._initBrowser(); + } + + async _initBrowser() { + let chromeFlags = 0; + if (this.remote) { + chromeFlags |= Ci.nsIWebBrowserChrome.CHROME_REMOTE_WINDOW; + } + if (this.remoteSubframes) { + chromeFlags |= Ci.nsIWebBrowserChrome.CHROME_FISSION_WINDOW; + } + if (this.privateBrowsing) { + chromeFlags |= Ci.nsIWebBrowserChrome.CHROME_PRIVATE_WINDOW; + } + this.windowlessBrowser = Services.appShell.createWindowlessBrowser( + true, + chromeFlags + ); + + let system = Services.scriptSecurityManager.getSystemPrincipal(); + + let chromeShell = this.windowlessBrowser.docShell.QueryInterface( + Ci.nsIWebNavigation + ); + + chromeShell.createAboutBlankDocumentViewer(system, system); + this.windowlessBrowser.browsingContext.useGlobalHistory = false; + let loadURIOptions = { + triggeringPrincipal: system, + }; + chromeShell.loadURI( + Services.io.newURI("chrome://extensions/content/dummy.xhtml"), + loadURIOptions + ); + + await promiseObserved( + "chrome-document-global-created", + win => win.document == chromeShell.document + ); + + let chromeDoc = await promiseDocumentLoaded(chromeShell.document); + + let { SpecialPowers } = chromeDoc.ownerGlobal; + SpecialPowers.xpcshellScope = XPCShellContentUtils.currentScope; + SpecialPowers.setAsDefaultAssertHandler(); + + let browser = chromeDoc.createXULElement("browser"); + browser.setAttribute("type", "content"); + browser.setAttribute("disableglobalhistory", "true"); + browser.setAttribute("messagemanagergroup", "webext-browsers"); + browser.setAttribute("nodefaultsrc", "true"); + if (this.userContextId) { + browser.setAttribute("usercontextid", this.userContextId); + } + + if (this.extension?.remote) { + browser.setAttribute("remote", "true"); + browser.setAttribute("remoteType", "extension"); + } + + // Ensure that the extension is loaded into the correct + // BrowsingContextGroupID by default. + if (this.extension) { + browser.setAttribute( + "initialBrowsingContextGroupId", + this.extension.browsingContextGroupId + ); + } + + let awaitFrameLoader = Promise.resolve(); + if (this.remote) { + awaitFrameLoader = promiseEvent(browser, "XULFrameLoaderCreated"); + browser.setAttribute("remote", "true"); + + browser.setAttribute("maychangeremoteness", "true"); + browser.addEventListener( + "DidChangeBrowserRemoteness", + this.didChangeBrowserRemoteness.bind(this) + ); + } + + chromeDoc.documentElement.appendChild(browser); + + // Forcibly flush layout so that we get a pres shell soon enough, see + // bug 1274775. + browser.getBoundingClientRect(); + + await awaitFrameLoader; + + this.browser = browser; + + this.loadFrameScript(frameScript); + + return browser; + } + + get browsingContext() { + return this.browser.browsingContext; + } + + get SpecialPowers() { + return this.browser.ownerGlobal.SpecialPowers; + } + + loadFrameScript(func) { + let frameScript = `data:text/javascript,(${encodeURI(func)}).call(this)`; + this.browser.messageManager.loadFrameScript(frameScript, true, true); + } + + addFrameScriptHelper(func) { + let frameScript = `data:text/javascript,${encodeURI(func)}`; + this.browser.messageManager.loadFrameScript(frameScript, false, true); + } + + didChangeBrowserRemoteness(event) { + // XXX: Tests can load their own additional frame scripts, so we may need to + // track all scripts that have been loaded, and reload them here? + this.loadFrameScript(frameScript); + } + + async loadURL(url, redirectUrl = undefined) { + await this.browserReady; + + this.browser.fixupAndLoadURIString(url, { + triggeringPrincipal: Services.scriptSecurityManager.getSystemPrincipal(), + }); + return promiseBrowserLoaded(this.browser, url, redirectUrl); + } + + async fetch(...args) { + return this.spawn(args, async (url, options) => { + let resp = await this.content.fetch(url, options); + return resp.text(); + }); + } + + spawn(params, task) { + return this.SpecialPowers.spawn(this.browser, params, task); + } + + // Like spawn(), but uses the legacy ContentTask infrastructure rather than + // SpecialPowers. Exists only because the author of the SpecialPowers + // migration did not have the time to fix all of the legacy users who relied + // on the old semantics. + // + // DO NOT USE IN NEW CODE + legacySpawn(params, task) { + lazy.ContentTask.setTestScope(XPCShellContentUtils.currentScope); + + return lazy.ContentTask.spawn(this.browser, params, task); + } + + async close() { + await this.browserReady; + + let { messageManager } = this.browser; + + this.browser.removeEventListener( + "DidChangeBrowserRemoteness", + this.didChangeBrowserRemoteness.bind(this) + ); + this.browser = null; + + this.windowlessBrowser.close(); + this.windowlessBrowser = null; + + await lazy.TestUtils.topicObserved( + "message-manager-disconnect", + subject => subject === messageManager + ); + } +} + +export var XPCShellContentUtils = { + currentScope: null, + fetchScopes: new Map(), + + initCommon(scope) { + this.currentScope = scope; + + // We need to load at least one frame script into every message + // manager to ensure that the scriptable wrapper for its global gets + // created before we try to access it externally. If we don't, we + // fail sanity checks on debug builds the first time we try to + // create a wrapper, because we should never have a global without a + // cached wrapper. + Services.mm.loadFrameScript("data:text/javascript,//", true, true); + + scope.registerCleanupFunction(() => { + this.currentScope = null; + + return Promise.all( + Array.from(this.fetchScopes.values(), promise => + promise.then(scope => scope.close()) + ) + ); + }); + }, + + init(scope) { + // QuotaManager crashes if it doesn't have a profile. + scope.do_get_profile(); + + this.initCommon(scope); + + lazy.SpecialPowersParent.registerActor(); + }, + + initMochitest(scope) { + this.initCommon(scope); + }, + + ensureInitialized(scope) { + if (!this.currentScope) { + if (scope.do_get_profile) { + this.init(scope); + } else { + this.initMochitest(scope); + } + } + }, + + /** + * Creates a new HttpServer for testing, and begins listening on the + * specified port. Automatically shuts down the server when the test + * unit ends. + * + * @param {object} [options = {}] + * The options object. + * @param {integer} [options.port = -1] + * The port to listen on. If omitted, listen on a random + * port. The latter is the preferred behavior. + * @param {sequence?} [options.hosts = null] + * A set of hosts to accept connections to. Support for this is + * implemented using a proxy filter. + * + * @returns {HttpServer} + * The HTTP server instance. + */ + createHttpServer({ port = -1, hosts } = {}) { + let server = new lazy.HttpServer(); + server.start(port); + + if (hosts) { + const hostsSet = new Set(); + const serverHost = "localhost"; + const serverPort = server.identity.primaryPort; + + for (let host of hosts) { + if (host.startsWith("[") && host.endsWith("]")) { + // HttpServer expects IPv6 addresses in bracket notation, but the + // proxy filter uses nsIURI.host, which does not have brackets. + hostsSet.add(host.slice(1, -1)); + } else { + hostsSet.add(host); + } + server.identity.add("http", host, 80); + } + + const proxyFilter = { + proxyInfo: lazy.proxyService.newProxyInfo( + "http", + serverHost, + serverPort, + "", + "", + 0, + 4096, + null + ), + + applyFilter(channel, defaultProxyInfo, callback) { + if (hostsSet.has(channel.URI.host)) { + callback.onProxyFilterResult(this.proxyInfo); + } else { + callback.onProxyFilterResult(defaultProxyInfo); + } + }, + }; + + lazy.proxyService.registerChannelFilter(proxyFilter, 0); + this.currentScope.registerCleanupFunction(() => { + lazy.proxyService.unregisterChannelFilter(proxyFilter); + }); + } + + this.currentScope.registerCleanupFunction(() => { + return new Promise(resolve => { + server.stop(resolve); + }); + }); + + return server; + }, + + registerJSON(server, path, obj) { + server.registerPathHandler(path, (request, response) => { + response.setHeader("content-type", "application/json", true); + response.write(JSON.stringify(obj)); + }); + }, + + async fetch(origin, url, options) { + let fetchScopePromise = this.fetchScopes.get(origin); + if (!fetchScopePromise) { + fetchScopePromise = this.loadContentPage(origin); + this.fetchScopes.set(origin, fetchScopePromise); + } + + let fetchScope = await fetchScopePromise; + return fetchScope.fetch(url, options); + }, + + /** + * Loads a content page into a hidden docShell. + * + * @param {string} url + * The URL to load. + * @param {object} [options = {}] + * @param {ExtensionWrapper} [options.extension] + * If passed, load the URL as an extension page for the given + * extension. + * @param {boolean} [options.remote] + * If true, load the URL in a content process. If false, load + * it in the parent process. + * @param {boolean} [options.remoteSubframes] + * If true, load cross-origin frames in separate content processes. + * This is ignored if |options.remote| is false. + * @param {string} [options.redirectUrl] + * An optional URL that the initial page is expected to + * redirect to. + * + * @returns {ContentPage} + */ + loadContentPage( + url, + { + extension = undefined, + remote = undefined, + remoteSubframes = undefined, + redirectUrl = undefined, + privateBrowsing = false, + userContextId = undefined, + } = {} + ) { + let contentPage = new ContentPage( + remote, + remoteSubframes, + extension && extension.extension, + privateBrowsing, + userContextId + ); + + return contentPage.loadURL(url, redirectUrl).then(() => { + return contentPage; + }); + }, +}; diff --git a/testing/modules/moz.build b/testing/modules/moz.build new file mode 100644 index 0000000000..f078152ce3 --- /dev/null +++ b/testing/modules/moz.build @@ -0,0 +1,39 @@ +# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*- +# vim: set filetype=python: +# This Source Code Form is subject to the terms of the Mozilla Public +# License, v. 2.0. If a copy of the MPL was not distributed with this +# file, You can obtain one at http://mozilla.org/MPL/2.0/. + +XPCSHELL_TESTS_MANIFESTS += ["tests/xpcshell/xpcshell.toml"] +BROWSER_CHROME_MANIFESTS += ["tests/browser/browser.toml"] + +TESTING_JS_MODULES += [ + "AppData.sys.mjs", + "AppInfo.sys.mjs", + "Assert.sys.mjs", + "CoverageUtils.sys.mjs", + "FileTestUtils.sys.mjs", + "MockRegistrar.sys.mjs", + "sinon-7.2.7.js", + "Sinon.sys.mjs", + "StructuredLog.sys.mjs", + "TestUtils.sys.mjs", + "XPCShellContentUtils.sys.mjs", +] + +if CONFIG["MOZ_WIDGET_TOOLKIT"] == "windows": + TESTING_JS_MODULES += [ + "MockRegistry.sys.mjs", + ] + + +TEST_HARNESS_FILES.testing.mochitest.tests.SimpleTest += ["StructuredLog.sys.mjs"] + +with Files("**"): + BUG_COMPONENT = ("Testing", "General") + +with Files("tests/xpcshell/**"): + BUG_COMPONENT = ("Testing", "XPCShell Harness") + +with Files("tests/browser/**"): + BUG_COMPONENT = ("Testing", "General") diff --git a/testing/modules/sinon-7.2.7.js b/testing/modules/sinon-7.2.7.js new file mode 100644 index 0000000000..a00574824b --- /dev/null +++ b/testing/modules/sinon-7.2.7.js @@ -0,0 +1,31787 @@ +/* Sinon.JS 7.2.7, 2019-03-04, @license BSD-3 */(function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}g.sinon = f()}})(function(){var define,module,exports;return (function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o= 0) { + return args[callArgAt]; + } + + var argumentList; + + if (callArgAt === useLeftMostCallback) { + argumentList = args; + } + + if (callArgAt === useRightMostCallback) { + argumentList = reverse(slice(args)); + } + + var callArgProp = behavior.callArgProp; + + for (var i = 0, l = argumentList.length; i < l; ++i) { + if (!callArgProp && typeof argumentList[i] === "function") { + return argumentList[i]; + } + + if (callArgProp && argumentList[i] && typeof argumentList[i][callArgProp] === "function") { + return argumentList[i][callArgProp]; + } + } + + return null; +} + +function getCallbackError(behavior, func, args) { + if (behavior.callArgAt < 0) { + var msg; + + if (behavior.callArgProp) { + msg = + functionName(behavior.stub) + + " expected to yield to '" + + valueToString(behavior.callArgProp) + + "', but no object with such a property was passed."; + } else { + msg = functionName(behavior.stub) + " expected to yield, but no callback was passed."; + } + + if (args.length > 0) { + msg += " Received [" + join(args, ", ") + "]"; + } + + return msg; + } + + return "argument at index " + behavior.callArgAt + " is not a function: " + func; +} + +function ensureArgs(name, behavior, args) { + // map function name to internal property + // callsArg => callArgAt + var property = name.replace(/sArg/, "ArgAt"); + var index = behavior[property]; + + if (index >= args.length) { + throw new TypeError( + name + " failed: " + (index + 1) + " arguments required but only " + args.length + " present" + ); + } +} + +function callCallback(behavior, args) { + if (typeof behavior.callArgAt === "number") { + ensureArgs("callsArg", behavior, args); + var func = getCallback(behavior, args); + + if (typeof func !== "function") { + throw new TypeError(getCallbackError(behavior, func, args)); + } + + if (behavior.callbackAsync) { + nextTick(function() { + func.apply(behavior.callbackContext, behavior.callbackArguments); + }); + } else { + return func.apply(behavior.callbackContext, behavior.callbackArguments); + } + } + + return undefined; +} + +var proto = { + create: function create(stub) { + var behavior = extend({}, proto); + delete behavior.create; + delete behavior.addBehavior; + delete behavior.createBehavior; + behavior.stub = stub; + + if (stub.defaultBehavior && stub.defaultBehavior.promiseLibrary) { + behavior.promiseLibrary = stub.defaultBehavior.promiseLibrary; + } + + return behavior; + }, + + isPresent: function isPresent() { + return ( + typeof this.callArgAt === "number" || + this.exception || + this.exceptionCreator || + typeof this.returnArgAt === "number" || + this.returnThis || + typeof this.resolveArgAt === "number" || + this.resolveThis || + typeof this.throwArgAt === "number" || + this.fakeFn || + this.returnValueDefined + ); + }, + + invoke: function invoke(context, args) { + /* + * callCallback (conditionally) calls ensureArgs + * + * Note: callCallback intentionally happens before + * everything else and cannot be moved lower + */ + var returnValue = callCallback(this, args); + + if (this.exception) { + throw this.exception; + } else if (this.exceptionCreator) { + this.exception = this.exceptionCreator(); + this.exceptionCreator = undefined; + throw this.exception; + } else if (typeof this.returnArgAt === "number") { + ensureArgs("returnsArg", this, args); + return args[this.returnArgAt]; + } else if (this.returnThis) { + return context; + } else if (typeof this.throwArgAt === "number") { + ensureArgs("throwsArg", this, args); + throw args[this.throwArgAt]; + } else if (this.fakeFn) { + return this.fakeFn.apply(context, args); + } else if (typeof this.resolveArgAt === "number") { + ensureArgs("resolvesArg", this, args); + return (this.promiseLibrary || Promise).resolve(args[this.resolveArgAt]); + } else if (this.resolveThis) { + return (this.promiseLibrary || Promise).resolve(context); + } else if (this.resolve) { + return (this.promiseLibrary || Promise).resolve(this.returnValue); + } else if (this.reject) { + return (this.promiseLibrary || Promise).reject(this.returnValue); + } else if (this.callsThrough) { + return this.stub.wrappedMethod.apply(context, args); + } else if (typeof this.returnValue !== "undefined") { + return this.returnValue; + } else if (typeof this.callArgAt === "number") { + return returnValue; + } + + return this.returnValue; + }, + + onCall: function onCall(index) { + return this.stub.onCall(index); + }, + + onFirstCall: function onFirstCall() { + return this.stub.onFirstCall(); + }, + + onSecondCall: function onSecondCall() { + return this.stub.onSecondCall(); + }, + + onThirdCall: function onThirdCall() { + return this.stub.onThirdCall(); + }, + + withArgs: function withArgs(/* arguments */) { + throw new Error( + 'Defining a stub by invoking "stub.onCall(...).withArgs(...)" ' + + 'is not supported. Use "stub.withArgs(...).onCall(...)" ' + + "to define sequential behavior for calls with certain arguments." + ); + } +}; + +function createBehavior(behaviorMethod) { + return function() { + this.defaultBehavior = this.defaultBehavior || proto.create(this); + this.defaultBehavior[behaviorMethod].apply(this.defaultBehavior, arguments); + return this; + }; +} + +function addBehavior(stub, name, fn) { + proto[name] = function() { + fn.apply(this, concat([this], slice(arguments))); + return this.stub || this; + }; + + stub[name] = createBehavior(name); +} + +proto.addBehavior = addBehavior; +proto.createBehavior = createBehavior; + +var asyncBehaviors = exportAsyncBehaviors(proto); + +module.exports = extend.nonEnum({}, proto, asyncBehaviors); + +},{"./util/core/export-async-behaviors":20,"./util/core/extend":21,"./util/core/next-tick":29,"@sinonjs/commons":39}],4:[function(require,module,exports){ +"use strict"; + +var arrayProto = require("@sinonjs/commons").prototypes.array; +var match = require("@sinonjs/samsam").createMatcher; +var deepEqual = require("@sinonjs/samsam").deepEqual; +var functionName = require("@sinonjs/commons").functionName; +var sinonFormat = require("./util/core/format"); +var valueToString = require("@sinonjs/commons").valueToString; + +var concat = arrayProto.concat; +var filter = arrayProto.filter; +var join = arrayProto.join; +var map = arrayProto.map; +var reduce = arrayProto.reduce; +var slice = arrayProto.slice; + +function throwYieldError(proxy, text, args) { + var msg = functionName(proxy) + text; + if (args.length) { + msg += " Received [" + join(slice(args), ", ") + "]"; + } + throw new Error(msg); +} + +var callProto = { + calledOn: function calledOn(thisValue) { + if (match.isMatcher(thisValue)) { + return thisValue.test(this.thisValue); + } + return this.thisValue === thisValue; + }, + + calledWith: function calledWith() { + var self = this; + var calledWithArgs = slice(arguments); + + if (calledWithArgs.length > self.args.length) { + return false; + } + + return reduce( + calledWithArgs, + function(prev, arg, i) { + return prev && deepEqual(self.args[i], arg); + }, + true + ); + }, + + calledWithMatch: function calledWithMatch() { + var self = this; + var calledWithMatchArgs = slice(arguments); + + if (calledWithMatchArgs.length > self.args.length) { + return false; + } + + return reduce( + calledWithMatchArgs, + function(prev, expectation, i) { + var actual = self.args[i]; + + return prev && match(expectation).test(actual); + }, + true + ); + }, + + calledWithExactly: function calledWithExactly() { + return arguments.length === this.args.length && this.calledWith.apply(this, arguments); + }, + + notCalledWith: function notCalledWith() { + return !this.calledWith.apply(this, arguments); + }, + + notCalledWithMatch: function notCalledWithMatch() { + return !this.calledWithMatch.apply(this, arguments); + }, + + returned: function returned(value) { + return deepEqual(this.returnValue, value); + }, + + threw: function threw(error) { + if (typeof error === "undefined" || !this.exception) { + return Boolean(this.exception); + } + + return this.exception === error || this.exception.name === error; + }, + + calledWithNew: function calledWithNew() { + return this.proxy.prototype && this.thisValue instanceof this.proxy; + }, + + calledBefore: function(other) { + return this.callId < other.callId; + }, + + calledAfter: function(other) { + return this.callId > other.callId; + }, + + calledImmediatelyBefore: function(other) { + return this.callId === other.callId - 1; + }, + + calledImmediatelyAfter: function(other) { + return this.callId === other.callId + 1; + }, + + callArg: function(pos) { + this.ensureArgIsAFunction(pos); + return this.args[pos](); + }, + + callArgOn: function(pos, thisValue) { + this.ensureArgIsAFunction(pos); + return this.args[pos].apply(thisValue); + }, + + callArgWith: function(pos) { + return this.callArgOnWith.apply(this, concat([pos, null], slice(arguments, 1))); + }, + + callArgOnWith: function(pos, thisValue) { + this.ensureArgIsAFunction(pos); + var args = slice(arguments, 2); + return this.args[pos].apply(thisValue, args); + }, + + throwArg: function(pos) { + if (pos > this.args.length) { + throw new TypeError("Not enough arguments: " + pos + " required but only " + this.args.length + " present"); + } + + throw this.args[pos]; + }, + + yield: function() { + return this.yieldOn.apply(this, concat([null], slice(arguments, 0))); + }, + + yieldOn: function(thisValue) { + var args = slice(this.args); + var yieldFn = filter(args, function(arg) { + return typeof arg === "function"; + })[0]; + + if (!yieldFn) { + throwYieldError(this.proxy, " cannot yield since no callback was passed.", args); + } + + return yieldFn.apply(thisValue, slice(arguments, 1)); + }, + + yieldTo: function(prop) { + return this.yieldToOn.apply(this, concat([prop, null], slice(arguments, 1))); + }, + + yieldToOn: function(prop, thisValue) { + var args = slice(this.args); + var yieldArg = filter(args, function(arg) { + return arg && typeof arg[prop] === "function"; + })[0]; + var yieldFn = yieldArg && yieldArg[prop]; + + if (!yieldFn) { + throwYieldError( + this.proxy, + " cannot yield to '" + valueToString(prop) + "' since no callback was passed.", + args + ); + } + + return yieldFn.apply(thisValue, slice(arguments, 2)); + }, + + toString: function() { + var callStr = this.proxy ? String(this.proxy) + "(" : ""; + var formattedArgs; + + if (!this.args) { + return ":("; + } + + formattedArgs = map(this.args, function(arg) { + return sinonFormat(arg); + }); + + callStr = callStr + join(formattedArgs, ", ") + ")"; + + if (typeof this.returnValue !== "undefined") { + callStr += " => " + sinonFormat(this.returnValue); + } + + if (this.exception) { + callStr += " !" + this.exception.name; + + if (this.exception.message) { + callStr += "(" + this.exception.message + ")"; + } + } + if (this.stack) { + // Omit the error message and the two top stack frames in sinon itself: + callStr += (this.stack.split("\n")[3] || "unknown").replace(/^\s*(?:at\s+|@)?/, " at "); + } + + return callStr; + }, + + ensureArgIsAFunction: function(pos) { + if (typeof this.args[pos] !== "function") { + throw new TypeError( + "Expected argument at position " + pos + " to be a Function, but was " + typeof this.args[pos] + ); + } + } +}; +Object.defineProperty(callProto, "stack", { + enumerable: true, + configurable: true, + get: function() { + return (this.errorWithCallStack && this.errorWithCallStack.stack) || ""; + } +}); + +callProto.invokeCallback = callProto.yield; + +function createSpyCall(spy, thisValue, args, returnValue, exception, id, errorWithCallStack) { + if (typeof id !== "number") { + throw new TypeError("Call id is not a number"); + } + + var proxyCall = Object.create(callProto); + var lastArg = (args.length > 0 && args[args.length - 1]) || undefined; + var callback = lastArg && typeof lastArg === "function" ? lastArg : undefined; + + proxyCall.proxy = spy; + proxyCall.thisValue = thisValue; + proxyCall.args = args; + proxyCall.lastArg = lastArg; + proxyCall.callback = callback; + proxyCall.returnValue = returnValue; + proxyCall.exception = exception; + proxyCall.callId = id; + proxyCall.errorWithCallStack = errorWithCallStack; + + return proxyCall; +} +createSpyCall.toString = callProto.toString; // used by mocks + +module.exports = createSpyCall; + +},{"./util/core/format":22,"@sinonjs/commons":39,"@sinonjs/samsam":65}],5:[function(require,module,exports){ +"use strict"; + +var walk = require("./util/core/walk"); +var getPropertyDescriptor = require("./util/core/get-property-descriptor"); +var hasOwnProperty = require("@sinonjs/commons").prototypes.object.hasOwnProperty; +var push = require("@sinonjs/commons").prototypes.array.push; + +function collectMethod(methods, object, prop, propOwner) { + if (typeof getPropertyDescriptor(propOwner, prop).value === "function" && hasOwnProperty(object, prop)) { + push(methods, object[prop]); + } +} + +// This function returns an array of all the own methods on the passed object +function collectOwnMethods(object) { + var methods = []; + + walk(object, collectMethod.bind(null, methods, object)); + + return methods; +} + +module.exports = collectOwnMethods; + +},{"./util/core/get-property-descriptor":25,"./util/core/walk":32,"@sinonjs/commons":39}],6:[function(require,module,exports){ +"use strict"; + +var supportsColor = require("supports-color"); + +function colorize(str, color) { + if (supportsColor.stdout === false) { + return str; + } + + return "\x1b[" + color + "m" + str + "\x1b[0m"; +} + +exports.red = function(str) { + return colorize(str, 31); +}; + +exports.green = function(str) { + return colorize(str, 32); +}; + +exports.cyan = function(str) { + return colorize(str, 96); +}; + +exports.white = function(str) { + return colorize(str, 39); +}; + +exports.bold = function(str) { + return colorize(str, 1); +}; + +},{"supports-color":88}],7:[function(require,module,exports){ +"use strict"; + +var arrayProto = require("@sinonjs/commons").prototypes.array; +var Sandbox = require("./sandbox"); + +var forEach = arrayProto.forEach; +var push = arrayProto.push; + +function prepareSandboxFromConfig(config) { + var sandbox = new Sandbox(); + + if (config.useFakeServer) { + if (typeof config.useFakeServer === "object") { + sandbox.serverPrototype = config.useFakeServer; + } + + sandbox.useFakeServer(); + } + + if (config.useFakeTimers) { + if (typeof config.useFakeTimers === "object") { + sandbox.useFakeTimers(config.useFakeTimers); + } else { + sandbox.useFakeTimers(); + } + } + + return sandbox; +} + +function exposeValue(sandbox, config, key, value) { + if (!value) { + return; + } + + if (config.injectInto && !(key in config.injectInto)) { + config.injectInto[key] = value; + push(sandbox.injectedKeys, key); + } else { + push(sandbox.args, value); + } +} + +function createSandbox(config) { + if (!config) { + return new Sandbox(); + } + + var configuredSandbox = prepareSandboxFromConfig(config); + configuredSandbox.args = configuredSandbox.args || []; + configuredSandbox.injectedKeys = []; + configuredSandbox.injectInto = config.injectInto; + var exposed = configuredSandbox.inject({}); + + if (config.properties) { + forEach(config.properties, function(prop) { + var value = exposed[prop] || (prop === "sandbox" && configuredSandbox); + exposeValue(configuredSandbox, config, prop, value); + }); + } else { + exposeValue(configuredSandbox, config, "sandbox"); + } + + return configuredSandbox; +} + +module.exports = createSandbox; + +},{"./sandbox":12,"@sinonjs/commons":39}],8:[function(require,module,exports){ +"use strict"; + +var arrayProto = require("@sinonjs/commons").prototypes.array; +var isPropertyConfigurable = require("./util/core/is-property-configurable"); +var exportAsyncBehaviors = require("./util/core/export-async-behaviors"); +var extend = require("./util/core/extend"); + +var slice = arrayProto.slice; + +var useLeftMostCallback = -1; +var useRightMostCallback = -2; + +function throwsException(fake, error, message) { + if (typeof error === "function") { + fake.exceptionCreator = error; + } else if (typeof error === "string") { + fake.exceptionCreator = function() { + var newException = new Error(message || ""); + newException.name = error; + return newException; + }; + } else if (!error) { + fake.exceptionCreator = function() { + return new Error("Error"); + }; + } else { + fake.exception = error; + } +} + +var defaultBehaviors = { + callsFake: function callsFake(fake, fn) { + fake.fakeFn = fn; + }, + + callsArg: function callsArg(fake, index) { + if (typeof index !== "number") { + throw new TypeError("argument index is not number"); + } + + fake.callArgAt = index; + fake.callbackArguments = []; + fake.callbackContext = undefined; + fake.callArgProp = undefined; + fake.callbackAsync = false; + }, + + callsArgOn: function callsArgOn(fake, index, context) { + if (typeof index !== "number") { + throw new TypeError("argument index is not number"); + } + + fake.callArgAt = index; + fake.callbackArguments = []; + fake.callbackContext = context; + fake.callArgProp = undefined; + fake.callbackAsync = false; + }, + + callsArgWith: function callsArgWith(fake, index) { + if (typeof index !== "number") { + throw new TypeError("argument index is not number"); + } + + fake.callArgAt = index; + fake.callbackArguments = slice(arguments, 2); + fake.callbackContext = undefined; + fake.callArgProp = undefined; + fake.callbackAsync = false; + }, + + callsArgOnWith: function callsArgWith(fake, index, context) { + if (typeof index !== "number") { + throw new TypeError("argument index is not number"); + } + + fake.callArgAt = index; + fake.callbackArguments = slice(arguments, 3); + fake.callbackContext = context; + fake.callArgProp = undefined; + fake.callbackAsync = false; + }, + + usingPromise: function usingPromise(fake, promiseLibrary) { + fake.promiseLibrary = promiseLibrary; + }, + + yields: function(fake) { + fake.callArgAt = useLeftMostCallback; + fake.callbackArguments = slice(arguments, 1); + fake.callbackContext = undefined; + fake.callArgProp = undefined; + fake.callbackAsync = false; + }, + + yieldsRight: function(fake) { + fake.callArgAt = useRightMostCallback; + fake.callbackArguments = slice(arguments, 1); + fake.callbackContext = undefined; + fake.callArgProp = undefined; + fake.callbackAsync = false; + }, + + yieldsOn: function(fake, context) { + fake.callArgAt = useLeftMostCallback; + fake.callbackArguments = slice(arguments, 2); + fake.callbackContext = context; + fake.callArgProp = undefined; + fake.callbackAsync = false; + }, + + yieldsTo: function(fake, prop) { + fake.callArgAt = useLeftMostCallback; + fake.callbackArguments = slice(arguments, 2); + fake.callbackContext = undefined; + fake.callArgProp = prop; + fake.callbackAsync = false; + }, + + yieldsToOn: function(fake, prop, context) { + fake.callArgAt = useLeftMostCallback; + fake.callbackArguments = slice(arguments, 3); + fake.callbackContext = context; + fake.callArgProp = prop; + fake.callbackAsync = false; + }, + + throws: throwsException, + throwsException: throwsException, + + returns: function returns(fake, value) { + fake.returnValue = value; + fake.resolve = false; + fake.reject = false; + fake.returnValueDefined = true; + fake.exception = undefined; + fake.exceptionCreator = undefined; + fake.fakeFn = undefined; + }, + + returnsArg: function returnsArg(fake, index) { + if (typeof index !== "number") { + throw new TypeError("argument index is not number"); + } + + fake.returnArgAt = index; + }, + + throwsArg: function throwsArg(fake, index) { + if (typeof index !== "number") { + throw new TypeError("argument index is not number"); + } + + fake.throwArgAt = index; + }, + + returnsThis: function returnsThis(fake) { + fake.returnThis = true; + }, + + resolves: function resolves(fake, value) { + fake.returnValue = value; + fake.resolve = true; + fake.resolveThis = false; + fake.reject = false; + fake.returnValueDefined = true; + fake.exception = undefined; + fake.exceptionCreator = undefined; + fake.fakeFn = undefined; + }, + + resolvesArg: function resolvesArg(fake, index) { + if (typeof index !== "number") { + throw new TypeError("argument index is not number"); + } + fake.resolveArgAt = index; + fake.returnValue = undefined; + fake.resolve = true; + fake.resolveThis = false; + fake.reject = false; + fake.returnValueDefined = false; + fake.exception = undefined; + fake.exceptionCreator = undefined; + fake.fakeFn = undefined; + }, + + rejects: function rejects(fake, error, message) { + var reason; + if (typeof error === "string") { + reason = new Error(message || ""); + reason.name = error; + } else if (!error) { + reason = new Error("Error"); + } else { + reason = error; + } + fake.returnValue = reason; + fake.resolve = false; + fake.resolveThis = false; + fake.reject = true; + fake.returnValueDefined = true; + fake.exception = undefined; + fake.exceptionCreator = undefined; + fake.fakeFn = undefined; + + return fake; + }, + + resolvesThis: function resolvesThis(fake) { + fake.returnValue = undefined; + fake.resolve = false; + fake.resolveThis = true; + fake.reject = false; + fake.returnValueDefined = false; + fake.exception = undefined; + fake.exceptionCreator = undefined; + fake.fakeFn = undefined; + }, + + callThrough: function callThrough(fake) { + fake.callsThrough = true; + }, + + get: function get(fake, getterFunction) { + var rootStub = fake.stub || fake; + + Object.defineProperty(rootStub.rootObj, rootStub.propName, { + get: getterFunction, + configurable: isPropertyConfigurable(rootStub.rootObj, rootStub.propName) + }); + + return fake; + }, + + set: function set(fake, setterFunction) { + var rootStub = fake.stub || fake; + + Object.defineProperty( + rootStub.rootObj, + rootStub.propName, + // eslint-disable-next-line accessor-pairs + { + set: setterFunction, + configurable: isPropertyConfigurable(rootStub.rootObj, rootStub.propName) + } + ); + + return fake; + }, + + value: function value(fake, newVal) { + var rootStub = fake.stub || fake; + + Object.defineProperty(rootStub.rootObj, rootStub.propName, { + value: newVal, + enumerable: true, + configurable: isPropertyConfigurable(rootStub.rootObj, rootStub.propName) + }); + + return fake; + } +}; + +var asyncBehaviors = exportAsyncBehaviors(defaultBehaviors); + +module.exports = extend({}, defaultBehaviors, asyncBehaviors); + +},{"./util/core/export-async-behaviors":20,"./util/core/extend":21,"./util/core/is-property-configurable":28,"@sinonjs/commons":39}],9:[function(require,module,exports){ +"use strict"; + +var arrayProto = require("@sinonjs/commons").prototypes.array; +var spy = require("./spy"); +var nextTick = require("./util/core/next-tick"); + +var forEach = arrayProto.forEach; +var slice = arrayProto.slice; + +function getError(value) { + return value instanceof Error ? value : new Error(value); +} + +function cleanProxy(f) { + var undesirableProperties = [ + "instantiateFake", + "callArg", + "callArgOn", + "callArgOnWith", + "callArgWith", + "invokeCallback", + "throwArg", + "withArgs", + "yield", + "yieldOn", + "yieldTo", + "yieldToOn" + ]; + + forEach(undesirableProperties, function(key) { + delete f[key]; + }); + + return f; +} + +var uuid = 0; +function wrapFunc(f) { + var fakeInstance = function() { + var lastArg = arguments.length > 0 ? arguments[arguments.length - 1] : undefined; + var callback = lastArg && typeof lastArg === "function" ? lastArg : undefined; + + /* eslint-disable no-use-before-define */ + p.lastArg = lastArg; + p.callback = callback; + /* eslint-enable no-use-before-define */ + + return f && f.apply(this, arguments); + }; + var p = cleanProxy(spy(fakeInstance)); + + p.displayName = "fake"; + p.id = "fake#" + uuid++; + + return p; +} + +function fake(f) { + if (arguments.length > 0 && typeof f !== "function") { + throw new TypeError("Expected f argument to be a Function"); + } + + return wrapFunc(f); +} + +fake.returns = function returns(value) { + function f() { + return value; + } + + return wrapFunc(f); +}; + +fake.throws = function throws(value) { + function f() { + throw getError(value); + } + + return wrapFunc(f); +}; + +fake.resolves = function resolves(value) { + function f() { + return Promise.resolve(value); + } + + return wrapFunc(f); +}; + +fake.rejects = function rejects(value) { + function f() { + return Promise.reject(getError(value)); + } + + return wrapFunc(f); +}; + +function yieldInternal(async, values) { + function f() { + var callback = arguments[arguments.length - 1]; + if (typeof callback !== "function") { + throw new TypeError("Expected last argument to be a function"); + } + if (async) { + nextTick(function() { + callback.apply(null, values); + }); + } else { + callback.apply(null, values); + } + } + + return wrapFunc(f); +} + +fake.yields = function yields() { + return yieldInternal(false, slice(arguments)); +}; + +fake.yieldsAsync = function yieldsAsync() { + return yieldInternal(true, slice(arguments)); +}; + +module.exports = fake; + +},{"./spy":14,"./util/core/next-tick":29,"@sinonjs/commons":39}],10:[function(require,module,exports){ +"use strict"; + +var arrayProto = require("@sinonjs/commons").prototypes.array; +var spyInvoke = require("./spy").invoke; +var spyCallToString = require("./call").toString; +var timesInWords = require("./util/core/times-in-words"); +var extend = require("./util/core/extend"); +var match = require("@sinonjs/samsam").createMatcher; +var stub = require("./stub"); +var assert = require("./assert"); +var deepEqual = require("@sinonjs/samsam").deepEqual; +var format = require("./util/core/format"); +var valueToString = require("@sinonjs/commons").valueToString; + +var every = arrayProto.every; +var forEach = arrayProto.forEach; +var push = arrayProto.push; +var slice = arrayProto.slice; + +function callCountInWords(callCount) { + if (callCount === 0) { + return "never called"; + } + + return "called " + timesInWords(callCount); +} + +function expectedCallCountInWords(expectation) { + var min = expectation.minCalls; + var max = expectation.maxCalls; + + if (typeof min === "number" && typeof max === "number") { + var str = timesInWords(min); + + if (min !== max) { + str = "at least " + str + " and at most " + timesInWords(max); + } + + return str; + } + + if (typeof min === "number") { + return "at least " + timesInWords(min); + } + + return "at most " + timesInWords(max); +} + +function receivedMinCalls(expectation) { + var hasMinLimit = typeof expectation.minCalls === "number"; + return !hasMinLimit || expectation.callCount >= expectation.minCalls; +} + +function receivedMaxCalls(expectation) { + if (typeof expectation.maxCalls !== "number") { + return false; + } + + return expectation.callCount === expectation.maxCalls; +} + +function verifyMatcher(possibleMatcher, arg) { + var isMatcher = match.isMatcher(possibleMatcher); + + return (isMatcher && possibleMatcher.test(arg)) || true; +} + +var mockExpectation = { + minCalls: 1, + maxCalls: 1, + + create: function create(methodName) { + var expectation = extend.nonEnum(stub.create(), mockExpectation); + delete expectation.create; + expectation.method = methodName; + + return expectation; + }, + + invoke: function invoke(func, thisValue, args) { + this.verifyCallAllowed(thisValue, args); + + return spyInvoke.apply(this, arguments); + }, + + atLeast: function atLeast(num) { + if (typeof num !== "number") { + throw new TypeError("'" + valueToString(num) + "' is not number"); + } + + if (!this.limitsSet) { + this.maxCalls = null; + this.limitsSet = true; + } + + this.minCalls = num; + + return this; + }, + + atMost: function atMost(num) { + if (typeof num !== "number") { + throw new TypeError("'" + valueToString(num) + "' is not number"); + } + + if (!this.limitsSet) { + this.minCalls = null; + this.limitsSet = true; + } + + this.maxCalls = num; + + return this; + }, + + never: function never() { + return this.exactly(0); + }, + + once: function once() { + return this.exactly(1); + }, + + twice: function twice() { + return this.exactly(2); + }, + + thrice: function thrice() { + return this.exactly(3); + }, + + exactly: function exactly(num) { + if (typeof num !== "number") { + throw new TypeError("'" + valueToString(num) + "' is not a number"); + } + + this.atLeast(num); + return this.atMost(num); + }, + + met: function met() { + return !this.failed && receivedMinCalls(this); + }, + + verifyCallAllowed: function verifyCallAllowed(thisValue, args) { + var expectedArguments = this.expectedArguments; + + if (receivedMaxCalls(this)) { + this.failed = true; + mockExpectation.fail(this.method + " already called " + timesInWords(this.maxCalls)); + } + + if ("expectedThis" in this && this.expectedThis !== thisValue) { + mockExpectation.fail( + this.method + + " called with " + + valueToString(thisValue) + + " as thisValue, expected " + + valueToString(this.expectedThis) + ); + } + + if (!("expectedArguments" in this)) { + return; + } + + if (!args) { + mockExpectation.fail(this.method + " received no arguments, expected " + format(expectedArguments)); + } + + if (args.length < expectedArguments.length) { + mockExpectation.fail( + this.method + + " received too few arguments (" + + format(args) + + "), expected " + + format(expectedArguments) + ); + } + + if (this.expectsExactArgCount && args.length !== expectedArguments.length) { + mockExpectation.fail( + this.method + + " received too many arguments (" + + format(args) + + "), expected " + + format(expectedArguments) + ); + } + + forEach( + expectedArguments, + function(expectedArgument, i) { + if (!verifyMatcher(expectedArgument, args[i])) { + mockExpectation.fail( + this.method + + " received wrong arguments " + + format(args) + + ", didn't match " + + String(expectedArguments) + ); + } + + if (!deepEqual(args[i], expectedArgument)) { + mockExpectation.fail( + this.method + + " received wrong arguments " + + format(args) + + ", expected " + + format(expectedArguments) + ); + } + }, + this + ); + }, + + allowsCall: function allowsCall(thisValue, args) { + var expectedArguments = this.expectedArguments; + + if (this.met() && receivedMaxCalls(this)) { + return false; + } + + if ("expectedThis" in this && this.expectedThis !== thisValue) { + return false; + } + + if (!("expectedArguments" in this)) { + return true; + } + + // eslint-disable-next-line no-underscore-dangle + var _args = args || []; + + if (_args.length < expectedArguments.length) { + return false; + } + + if (this.expectsExactArgCount && _args.length !== expectedArguments.length) { + return false; + } + + return every(expectedArguments, function(expectedArgument, i) { + if (!verifyMatcher(expectedArgument, _args[i])) { + return false; + } + + if (!deepEqual(_args[i], expectedArgument)) { + return false; + } + + return true; + }); + }, + + withArgs: function withArgs() { + this.expectedArguments = slice(arguments); + return this; + }, + + withExactArgs: function withExactArgs() { + this.withArgs.apply(this, arguments); + this.expectsExactArgCount = true; + return this; + }, + + on: function on(thisValue) { + this.expectedThis = thisValue; + return this; + }, + + toString: function() { + var args = slice(this.expectedArguments || []); + + if (!this.expectsExactArgCount) { + push(args, "[...]"); + } + + var callStr = spyCallToString.call({ + proxy: this.method || "anonymous mock expectation", + args: args + }); + + var message = callStr.replace(", [...", "[, ...") + " " + expectedCallCountInWords(this); + + if (this.met()) { + return "Expectation met: " + message; + } + + return "Expected " + message + " (" + callCountInWords(this.callCount) + ")"; + }, + + verify: function verify() { + if (!this.met()) { + mockExpectation.fail(String(this)); + } else { + mockExpectation.pass(String(this)); + } + + return true; + }, + + pass: function pass(message) { + assert.pass(message); + }, + + fail: function fail(message) { + var exception = new Error(message); + exception.name = "ExpectationError"; + + throw exception; + } +}; + +module.exports = mockExpectation; + +},{"./assert":2,"./call":4,"./spy":14,"./stub":16,"./util/core/extend":21,"./util/core/format":22,"./util/core/times-in-words":30,"@sinonjs/commons":39,"@sinonjs/samsam":65}],11:[function(require,module,exports){ +"use strict"; + +var arrayProto = require("@sinonjs/commons").prototypes.array; +var mockExpectation = require("./mock-expectation"); +var spyCallToString = require("./call").toString; +var extend = require("./util/core/extend"); +var deepEqual = require("@sinonjs/samsam").deepEqual; +var wrapMethod = require("./util/core/wrap-method"); +var usePromiseLibrary = require("./util/core/use-promise-library"); + +var concat = arrayProto.concat; +var filter = arrayProto.filter; +var forEach = arrayProto.forEach; +var every = arrayProto.every; +var join = arrayProto.join; +var push = arrayProto.push; +var slice = arrayProto.slice; +var unshift = arrayProto.unshift; + +function mock(object) { + if (!object || typeof object === "string") { + return mockExpectation.create(object ? object : "Anonymous mock"); + } + + return mock.create(object); +} + +function each(collection, callback) { + var col = collection || []; + + forEach(col, callback); +} + +function arrayEquals(arr1, arr2, compareLength) { + if (compareLength && arr1.length !== arr2.length) { + return false; + } + + return every(arr1, function(element, i) { + return deepEqual(arr2[i], element); + }); +} + +extend(mock, { + create: function create(object) { + if (!object) { + throw new TypeError("object is null"); + } + + var mockObject = extend.nonEnum({}, mock, { object: object }); + delete mockObject.create; + + return mockObject; + }, + + expects: function expects(method) { + if (!method) { + throw new TypeError("method is falsy"); + } + + if (!this.expectations) { + this.expectations = {}; + this.proxies = []; + this.failures = []; + } + + if (!this.expectations[method]) { + this.expectations[method] = []; + var mockObject = this; + + wrapMethod(this.object, method, function() { + return mockObject.invokeMethod(method, this, arguments); + }); + + push(this.proxies, method); + } + + var expectation = mockExpectation.create(method); + extend.nonEnum(expectation, this.object[method]); + push(this.expectations[method], expectation); + usePromiseLibrary(this.promiseLibrary, expectation); + + return expectation; + }, + + restore: function restore() { + var object = this.object; + + each(this.proxies, function(proxy) { + if (typeof object[proxy].restore === "function") { + object[proxy].restore(); + } + }); + }, + + verify: function verify() { + var expectations = this.expectations || {}; + var messages = this.failures ? slice(this.failures) : []; + var met = []; + + each(this.proxies, function(proxy) { + each(expectations[proxy], function(expectation) { + if (!expectation.met()) { + push(messages, String(expectation)); + } else { + push(met, String(expectation)); + } + }); + }); + + this.restore(); + + if (messages.length > 0) { + mockExpectation.fail(join(concat(messages, met), "\n")); + } else if (met.length > 0) { + mockExpectation.pass(join(concat(messages, met), "\n")); + } + + return true; + }, + + usingPromise: function usingPromise(promiseLibrary) { + this.promiseLibrary = promiseLibrary; + + return this; + }, + + invokeMethod: function invokeMethod(method, thisValue, args) { + /* if we cannot find any matching files we will explicitly call mockExpection#fail with error messages */ + /* eslint consistent-return: "off" */ + var expectations = this.expectations && this.expectations[method] ? this.expectations[method] : []; + var currentArgs = args || []; + var available; + + var expectationsWithMatchingArgs = filter(expectations, function(expectation) { + var expectedArgs = expectation.expectedArguments || []; + + return arrayEquals(expectedArgs, currentArgs, expectation.expectsExactArgCount); + }); + + var expectationsToApply = filter(expectationsWithMatchingArgs, function(expectation) { + return !expectation.met() && expectation.allowsCall(thisValue, args); + }); + + if (expectationsToApply.length > 0) { + return expectationsToApply[0].apply(thisValue, args); + } + + var messages = []; + var exhausted = 0; + + forEach(expectationsWithMatchingArgs, function(expectation) { + if (expectation.allowsCall(thisValue, args)) { + available = available || expectation; + } else { + exhausted += 1; + } + }); + + if (available && exhausted === 0) { + return available.apply(thisValue, args); + } + + forEach(expectations, function(expectation) { + push(messages, " " + String(expectation)); + }); + + unshift( + messages, + "Unexpected call: " + + spyCallToString.call({ + proxy: method, + args: args + }) + ); + + var err = new Error(); + if (!err.stack) { + // PhantomJS does not serialize the stack trace until the error has been thrown + try { + throw err; + } catch (e) { + /* empty */ + } + } + push( + this.failures, + "Unexpected call: " + + spyCallToString.call({ + proxy: method, + args: args, + stack: err.stack + }) + ); + + mockExpectation.fail(join(messages, "\n")); + } +}); + +module.exports = mock; + +},{"./call":4,"./mock-expectation":10,"./util/core/extend":21,"./util/core/use-promise-library":31,"./util/core/wrap-method":33,"@sinonjs/commons":39,"@sinonjs/samsam":65}],12:[function(require,module,exports){ +"use strict"; + +var arrayProto = require("@sinonjs/commons").prototypes.array; +var collectOwnMethods = require("./collect-own-methods"); +var getPropertyDescriptor = require("./util/core/get-property-descriptor"); +var isEsModule = require("./util/core/is-es-module"); +var isPropertyConfigurable = require("./util/core/is-property-configurable"); +var isNonExistentOwnProperty = require("./util/core/is-non-existent-own-property"); +var match = require("@sinonjs/samsam").createMatcher; +var sinonAssert = require("./assert"); +var sinonClock = require("./util/fake-timers"); +var sinonMock = require("./mock"); +var sinonSpy = require("./spy"); +var sinonStub = require("./stub"); +var sinonFake = require("./fake"); +var valueToString = require("@sinonjs/commons").valueToString; +var fakeServer = require("nise").fakeServer; +var fakeXhr = require("nise").fakeXhr; +var usePromiseLibrary = require("./util/core/use-promise-library"); + +var filter = arrayProto.filter; +var forEach = arrayProto.filter; +var push = arrayProto.push; +var reverse = arrayProto.reverse; + +function applyOnEach(fakes, method) { + var matchingFakes = filter(fakes, function(fake) { + return typeof fake[method] === "function"; + }); + + forEach(matchingFakes, function(fake) { + fake[method](); + }); +} + +function Sandbox() { + var sandbox = this; + var collection = []; + var fakeRestorers = []; + var promiseLib; + + sandbox.serverPrototype = fakeServer; + + // this is for testing only + sandbox.getFakes = function getFakes() { + return collection; + }; + + // this is for testing only + sandbox.getRestorers = function() { + return fakeRestorers; + }; + + sandbox.createStubInstance = function createStubInstance(constructor) { + if (typeof constructor !== "function") { + throw new TypeError("The constructor should be a function."); + } + return this.stub(Object.create(constructor.prototype)); + }; + + sandbox.inject = function inject(obj) { + obj.spy = function() { + return sandbox.spy.apply(null, arguments); + }; + + obj.stub = function() { + return sandbox.stub.apply(null, arguments); + }; + + obj.mock = function() { + return sandbox.mock.apply(null, arguments); + }; + + if (sandbox.clock) { + obj.clock = sandbox.clock; + } + + if (sandbox.server) { + obj.server = sandbox.server; + obj.requests = sandbox.server.requests; + } + + obj.match = match; + + return obj; + }; + + sandbox.mock = function mock() { + var m = sinonMock.apply(null, arguments); + + push(collection, m); + usePromiseLibrary(promiseLib, m); + + return m; + }; + + sandbox.reset = function reset() { + applyOnEach(collection, "reset"); + applyOnEach(collection, "resetHistory"); + }; + + sandbox.resetBehavior = function resetBehavior() { + applyOnEach(collection, "resetBehavior"); + }; + + sandbox.resetHistory = function resetHistory() { + function privateResetHistory(f) { + var method = f.resetHistory || f.reset; + if (method) { + method.call(f); + } + } + + forEach(collection, function(fake) { + if (typeof fake === "function") { + privateResetHistory(fake); + return; + } + + var methods = []; + if (fake.get) { + push(methods, fake.get); + } + + if (fake.set) { + push(methods, fake.set); + } + + forEach(methods, privateResetHistory); + }); + }; + + sandbox.restore = function restore() { + if (arguments.length) { + throw new Error("sandbox.restore() does not take any parameters. Perhaps you meant stub.restore()"); + } + + reverse(collection); + applyOnEach(collection, "restore"); + collection = []; + + forEach(fakeRestorers, function(restorer) { + restorer(); + }); + fakeRestorers = []; + + sandbox.restoreContext(); + }; + + sandbox.restoreContext = function restoreContext() { + var injectedKeys = sandbox.injectedKeys; + var injectInto = sandbox.injectInto; + + if (!injectedKeys) { + return; + } + + forEach(injectedKeys, function(injectedKey) { + delete injectInto[injectedKey]; + }); + + injectedKeys = []; + }; + + function getFakeRestorer(object, property) { + var descriptor = getPropertyDescriptor(object, property); + + function restorer() { + Object.defineProperty(object, property, descriptor); + } + restorer.object = object; + restorer.property = property; + return restorer; + } + + function verifyNotReplaced(object, property) { + forEach(fakeRestorers, function(fakeRestorer) { + if (fakeRestorer.object === object && fakeRestorer.property === property) { + throw new TypeError("Attempted to replace " + property + " which is already replaced"); + } + }); + } + + sandbox.replace = function replace(object, property, replacement) { + var descriptor = getPropertyDescriptor(object, property); + + if (typeof descriptor === "undefined") { + throw new TypeError("Cannot replace non-existent own property " + valueToString(property)); + } + + if (typeof replacement === "undefined") { + throw new TypeError("Expected replacement argument to be defined"); + } + + if (typeof descriptor.get === "function") { + throw new Error("Use sandbox.replaceGetter for replacing getters"); + } + + if (typeof descriptor.set === "function") { + throw new Error("Use sandbox.replaceSetter for replacing setters"); + } + + if (typeof object[property] !== typeof replacement) { + throw new TypeError("Cannot replace " + typeof object[property] + " with " + typeof replacement); + } + + verifyNotReplaced(object, property); + + // store a function for restoring the replaced property + push(fakeRestorers, getFakeRestorer(object, property)); + + object[property] = replacement; + + return replacement; + }; + + sandbox.replaceGetter = function replaceGetter(object, property, replacement) { + var descriptor = getPropertyDescriptor(object, property); + + if (typeof descriptor === "undefined") { + throw new TypeError("Cannot replace non-existent own property " + valueToString(property)); + } + + if (typeof replacement !== "function") { + throw new TypeError("Expected replacement argument to be a function"); + } + + if (typeof descriptor.get !== "function") { + throw new Error("`object.property` is not a getter"); + } + + verifyNotReplaced(object, property); + + // store a function for restoring the replaced property + push(fakeRestorers, getFakeRestorer(object, property)); + + Object.defineProperty(object, property, { + get: replacement, + configurable: isPropertyConfigurable(object, property) + }); + + return replacement; + }; + + sandbox.replaceSetter = function replaceSetter(object, property, replacement) { + var descriptor = getPropertyDescriptor(object, property); + + if (typeof descriptor === "undefined") { + throw new TypeError("Cannot replace non-existent own property " + valueToString(property)); + } + + if (typeof replacement !== "function") { + throw new TypeError("Expected replacement argument to be a function"); + } + + if (typeof descriptor.set !== "function") { + throw new Error("`object.property` is not a setter"); + } + + verifyNotReplaced(object, property); + + // store a function for restoring the replaced property + push(fakeRestorers, getFakeRestorer(object, property)); + + // eslint-disable-next-line accessor-pairs + Object.defineProperty(object, property, { + set: replacement, + configurable: isPropertyConfigurable(object, property) + }); + + return replacement; + }; + + sandbox.spy = function spy() { + var s = sinonSpy.apply(sinonSpy, arguments); + + push(collection, s); + + return s; + }; + + sandbox.stub = function stub(object, property) { + if (isEsModule(object)) { + throw new TypeError("ES Modules cannot be stubbed"); + } + + if (isNonExistentOwnProperty(object, property)) { + throw new TypeError("Cannot stub non-existent own property " + valueToString(property)); + } + + var stubbed = sinonStub.apply(null, arguments); + var isStubbingEntireObject = typeof property === "undefined" && typeof object === "object"; + + if (isStubbingEntireObject) { + var ownMethods = collectOwnMethods(stubbed); + + forEach(ownMethods, function(method) { + push(collection, method); + }); + + usePromiseLibrary(promiseLib, ownMethods); + } else { + push(collection, stubbed); + usePromiseLibrary(promiseLib, stubbed); + } + + return stubbed; + }; + + // eslint-disable-next-line no-unused-vars + sandbox.fake = function fake(f) { + var s = sinonFake.apply(sinonFake, arguments); + + push(collection, s); + + return s; + }; + + forEach(Object.keys(sinonFake), function(key) { + var fakeBehavior = sinonFake[key]; + if (typeof fakeBehavior === "function") { + sandbox.fake[key] = function() { + var s = fakeBehavior.apply(fakeBehavior, arguments); + + push(collection, s); + + return s; + }; + } + }); + + sandbox.useFakeTimers = function useFakeTimers(args) { + var clock = sinonClock.useFakeTimers.call(null, args); + + sandbox.clock = clock; + push(collection, clock); + + return clock; + }; + + sandbox.verify = function verify() { + applyOnEach(collection, "verify"); + }; + + sandbox.verifyAndRestore = function verifyAndRestore() { + var exception; + + try { + sandbox.verify(); + } catch (e) { + exception = e; + } + + sandbox.restore(); + + if (exception) { + throw exception; + } + }; + + sandbox.useFakeServer = function useFakeServer() { + var proto = sandbox.serverPrototype || fakeServer; + + if (!proto || !proto.create) { + return null; + } + + sandbox.server = proto.create(); + push(collection, sandbox.server); + + return sandbox.server; + }; + + sandbox.useFakeXMLHttpRequest = function useFakeXMLHttpRequest() { + var xhr = fakeXhr.useFakeXMLHttpRequest(); + push(collection, xhr); + return xhr; + }; + + sandbox.usingPromise = function usingPromise(promiseLibrary) { + promiseLib = promiseLibrary; + collection.promiseLibrary = promiseLibrary; + + return sandbox; + }; +} + +Sandbox.prototype.assert = sinonAssert; +Sandbox.prototype.match = match; + +module.exports = Sandbox; + +},{"./assert":2,"./collect-own-methods":5,"./fake":9,"./mock":11,"./spy":14,"./stub":16,"./util/core/get-property-descriptor":25,"./util/core/is-es-module":26,"./util/core/is-non-existent-own-property":27,"./util/core/is-property-configurable":28,"./util/core/use-promise-library":31,"./util/fake-timers":34,"@sinonjs/commons":39,"@sinonjs/samsam":65,"nise":85}],13:[function(require,module,exports){ +"use strict"; + +var arrayProto = require("@sinonjs/commons").prototypes.array; +var color = require("./color"); +var match = require("@sinonjs/samsam").createMatcher; +var timesInWords = require("./util/core/times-in-words"); +var sinonFormat = require("./util/core/format"); +var jsDiff = require("diff"); + +var join = arrayProto.join; +var map = arrayProto.map; +var push = arrayProto.push; + +function colorSinonMatchText(matcher, calledArg, calledArgMessage) { + var calledArgumentMessage = calledArgMessage; + if (!matcher.test(calledArg)) { + matcher.message = color.red(matcher.message); + if (calledArgumentMessage) { + calledArgumentMessage = color.green(calledArgumentMessage); + } + } + return calledArgumentMessage + " " + matcher.message; +} + +function colorDiffText(diff) { + var objects = map(diff, function(part) { + var text = part.value; + if (part.added) { + text = color.green(text); + } else if (part.removed) { + text = color.red(text); + } + if (diff.length === 2) { + text += " "; // format simple diffs + } + return text; + }); + return join(objects, ""); +} + +module.exports = { + c: function(spyInstance) { + return timesInWords(spyInstance.callCount); + }, + + n: function(spyInstance) { + // eslint-disable-next-line local-rules/no-prototype-methods + return spyInstance.toString(); + }, + + D: function(spyInstance, args) { + var message = ""; + + for (var i = 0, l = spyInstance.callCount; i < l; ++i) { + // describe multiple calls + if (l > 1) { + message += "\nCall " + (i + 1) + ":"; + } + var calledArgs = spyInstance.getCall(i).args; + for (var j = 0; j < calledArgs.length || j < args.length; ++j) { + message += "\n"; + var calledArgMessage = j < calledArgs.length ? sinonFormat(calledArgs[j]) : ""; + if (match.isMatcher(args[j])) { + message += colorSinonMatchText(args[j], calledArgs[j], calledArgMessage); + } else { + var expectedArgMessage = j < args.length ? sinonFormat(args[j]) : ""; + var diff = jsDiff.diffJson(calledArgMessage, expectedArgMessage); + message += colorDiffText(diff); + } + } + } + + return message; + }, + + C: function(spyInstance) { + var calls = []; + + for (var i = 0, l = spyInstance.callCount; i < l; ++i) { + // eslint-disable-next-line local-rules/no-prototype-methods + var stringifiedCall = " " + spyInstance.getCall(i).toString(); + if (/\n/.test(calls[i - 1])) { + stringifiedCall = "\n" + stringifiedCall; + } + push(calls, stringifiedCall); + } + + return calls.length > 0 ? "\n" + join(calls, "\n") : ""; + }, + + t: function(spyInstance) { + var objects = []; + + for (var i = 0, l = spyInstance.callCount; i < l; ++i) { + push(objects, sinonFormat(spyInstance.thisValues[i])); + } + + return join(objects, ", "); + }, + + "*": function(spyInstance, args) { + return join( + map(args, function(arg) { + return sinonFormat(arg); + }), + ", " + ); + } +}; + +},{"./color":6,"./util/core/format":22,"./util/core/times-in-words":30,"@sinonjs/commons":39,"@sinonjs/samsam":65,"diff":69}],14:[function(require,module,exports){ +"use strict"; + +var arrayProto = require("@sinonjs/commons").prototypes.array; +var createBehavior = require("./behavior").create; +var extend = require("./util/core/extend"); +var functionName = require("@sinonjs/commons").functionName; +var functionToString = require("./util/core/function-to-string"); +var getPropertyDescriptor = require("./util/core/get-property-descriptor"); +var deepEqual = require("@sinonjs/samsam").deepEqual; +var isEsModule = require("./util/core/is-es-module"); +var spyCall = require("./call"); +var wrapMethod = require("./util/core/wrap-method"); +var sinonFormat = require("./util/core/format"); +var valueToString = require("@sinonjs/commons").valueToString; + +/* cache references to library methods so that they also can be stubbed without problems */ +var concat = arrayProto.concat; +var forEach = arrayProto.forEach; +var pop = arrayProto.pop; +var push = arrayProto.push; +var slice = arrayProto.slice; +var filter = Array.prototype.filter; +var ErrorConstructor = Error.prototype.constructor; +var bind = Function.prototype.bind; + +var callId = 0; + +function spy(object, property, types) { + var descriptor, methodDesc; + + if (isEsModule(object)) { + throw new TypeError("ES Modules cannot be spied"); + } + + if (!property && typeof object === "function") { + return spy.create(object); + } + + if (!object && !property) { + return spy.create(function() { + return; + }); + } + + if (!types) { + return wrapMethod(object, property, spy.create(object[property])); + } + + descriptor = {}; + methodDesc = getPropertyDescriptor(object, property); + + forEach(types, function(type) { + descriptor[type] = spy.create(methodDesc[type]); + }); + + return wrapMethod(object, property, descriptor); +} + +function incrementCallCount() { + this.called = true; + this.callCount += 1; + this.notCalled = false; + this.calledOnce = this.callCount === 1; + this.calledTwice = this.callCount === 2; + this.calledThrice = this.callCount === 3; +} + +function createCallProperties() { + this.firstCall = this.getCall(0); + this.secondCall = this.getCall(1); + this.thirdCall = this.getCall(2); + this.lastCall = this.getCall(this.callCount - 1); +} + +function createProxy(func, proxyLength) { + // Retain the function length: + var p; + if (proxyLength) { + // Do not change this to use an eval. Projects that depend on sinon block the use of eval. + // ref: https://github.com/sinonjs/sinon/issues/710 + switch (proxyLength) { + /*eslint-disable no-unused-vars, max-len*/ + case 1: + p = function proxy(a) { + return p.invoke(func, this, slice(arguments)); + }; + break; + case 2: + p = function proxy(a, b) { + return p.invoke(func, this, slice(arguments)); + }; + break; + case 3: + p = function proxy(a, b, c) { + return p.invoke(func, this, slice(arguments)); + }; + break; + case 4: + p = function proxy(a, b, c, d) { + return p.invoke(func, this, slice(arguments)); + }; + break; + case 5: + p = function proxy(a, b, c, d, e) { + return p.invoke(func, this, slice(arguments)); + }; + break; + case 6: + p = function proxy(a, b, c, d, e, f) { + return p.invoke(func, this, slice(arguments)); + }; + break; + case 7: + p = function proxy(a, b, c, d, e, f, g) { + return p.invoke(func, this, slice(arguments)); + }; + break; + case 8: + p = function proxy(a, b, c, d, e, f, g, h) { + return p.invoke(func, this, slice(arguments)); + }; + break; + case 9: + p = function proxy(a, b, c, d, e, f, g, h, i) { + return p.invoke(func, this, slice(arguments)); + }; + break; + case 10: + p = function proxy(a, b, c, d, e, f, g, h, i, j) { + return p.invoke(func, this, slice(arguments)); + }; + break; + case 11: + p = function proxy(a, b, c, d, e, f, g, h, i, j, k) { + return p.invoke(func, this, slice(arguments)); + }; + break; + case 12: + p = function proxy(a, b, c, d, e, f, g, h, i, j, k, l) { + return p.invoke(func, this, slice(arguments)); + }; + break; + default: + p = function proxy() { + return p.invoke(func, this, slice(arguments)); + }; + break; + /*eslint-enable*/ + } + } else { + p = function proxy() { + return p.invoke(func, this, slice(arguments)); + }; + } + var nameDescriptor = Object.getOwnPropertyDescriptor(func, "name"); + if (nameDescriptor && nameDescriptor.configurable) { + // IE 11 functions don't have a name. + // Safari 9 has names that are not configurable. + Object.defineProperty(p, "name", nameDescriptor); + } + extend.nonEnum(p, { + isSinonProxy: true, + + called: false, + notCalled: true, + calledOnce: false, + calledTwice: false, + calledThrice: false, + callCount: 0, + firstCall: null, + secondCall: null, + thirdCall: null, + lastCall: null, + args: [], + returnValues: [], + thisValues: [], + exceptions: [], + callIds: [], + errorsWithCallStack: [] + }); + return p; +} + +var uuid = 0; + +// Public API +var spyApi = { + formatters: require("./spy-formatters"), + + resetHistory: function() { + if (this.invoking) { + var err = new Error( + "Cannot reset Sinon function while invoking it. " + + "Move the call to .resetHistory outside of the callback." + ); + err.name = "InvalidResetException"; + throw err; + } + + this.called = false; + this.notCalled = true; + this.calledOnce = false; + this.calledTwice = false; + this.calledThrice = false; + this.callCount = 0; + this.firstCall = null; + this.secondCall = null; + this.thirdCall = null; + this.lastCall = null; + this.args = []; + this.returnValues = []; + this.thisValues = []; + this.exceptions = []; + this.callIds = []; + this.errorsWithCallStack = []; + + if (this.fakes) { + forEach(this.fakes, function(fake) { + if (fake.resetHistory) { + fake.resetHistory(); + } else { + fake.reset(); + } + }); + } + + return this; + }, + + create: function create(func, spyLength) { + var name; + var funk = func; + + if (typeof funk !== "function") { + funk = function() { + return; + }; + } else { + name = functionName(funk); + } + + var length = spyLength || funk.length; + var proxy = createProxy(funk, length); + + extend.nonEnum(proxy, spy); + delete proxy.create; + extend(proxy, funk); + + proxy.resetHistory(); + proxy.prototype = funk.prototype; + + extend.nonEnum(proxy, { + displayName: name || "spy", + toString: functionToString, + instantiateFake: spy.create, + id: "spy#" + uuid++ + }); + + return proxy; + }, + + invoke: function invoke(func, thisValue, args) { + var matchings = this.matchingFakes(args); + var currentCallId = callId++; + var exception, returnValue; + + incrementCallCount.call(this); + push(this.thisValues, thisValue); + push(this.args, args); + push(this.callIds, currentCallId); + forEach(matchings, function(matching) { + incrementCallCount.call(matching); + push(matching.thisValues, thisValue); + push(matching.args, args); + push(matching.callIds, currentCallId); + }); + + // Make call properties available from within the spied function: + createCallProperties.call(this); + forEach(matchings, function(matching) { + createCallProperties.call(matching); + }); + + try { + this.invoking = true; + + var thisCall = this.getCall(this.callCount - 1); + + if (thisCall.calledWithNew()) { + // Call through with `new` + returnValue = new (bind.apply(this.func || func, concat([thisValue], args)))(); + + if (typeof returnValue !== "object") { + returnValue = thisValue; + } + } else { + returnValue = (this.func || func).apply(thisValue, args); + } + } catch (e) { + exception = e; + } finally { + delete this.invoking; + } + + push(this.exceptions, exception); + push(this.returnValues, returnValue); + forEach(matchings, function(matching) { + push(matching.exceptions, exception); + push(matching.returnValues, returnValue); + }); + + var err = new ErrorConstructor(); + // 1. Please do not get stack at this point. It may be so very slow, and not actually used + // 2. PhantomJS does not serialize the stack trace until the error has been thrown: + // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error/Stack + try { + throw err; + } catch (e) { + /* empty */ + } + push(this.errorsWithCallStack, err); + forEach(matchings, function(matching) { + push(matching.errorsWithCallStack, err); + }); + + // Make return value and exception available in the calls: + createCallProperties.call(this); + forEach(matchings, function(matching) { + createCallProperties.call(matching); + }); + + if (exception !== undefined) { + throw exception; + } + + return returnValue; + }, + + named: function named(name) { + this.displayName = name; + var nameDescriptor = Object.getOwnPropertyDescriptor(this, "name"); + if (nameDescriptor && nameDescriptor.configurable) { + // IE 11 functions don't have a name. + // Safari 9 has names that are not configurable. + nameDescriptor.value = name; + Object.defineProperty(this, "name", nameDescriptor); + } + return this; + }, + + getCall: function getCall(i) { + if (i < 0 || i >= this.callCount) { + return null; + } + + return spyCall( + this, + this.thisValues[i], + this.args[i], + this.returnValues[i], + this.exceptions[i], + this.callIds[i], + this.errorsWithCallStack[i] + ); + }, + + getCalls: function() { + var calls = []; + var i; + + for (i = 0; i < this.callCount; i++) { + push(calls, this.getCall(i)); + } + + return calls; + }, + + calledBefore: function calledBefore(spyFn) { + if (!this.called) { + return false; + } + + if (!spyFn.called) { + return true; + } + + return this.callIds[0] < spyFn.callIds[spyFn.callIds.length - 1]; + }, + + calledAfter: function calledAfter(spyFn) { + if (!this.called || !spyFn.called) { + return false; + } + + return this.callIds[this.callCount - 1] > spyFn.callIds[0]; + }, + + calledImmediatelyBefore: function calledImmediatelyBefore(spyFn) { + if (!this.called || !spyFn.called) { + return false; + } + + return this.callIds[this.callCount - 1] === spyFn.callIds[spyFn.callCount - 1] - 1; + }, + + calledImmediatelyAfter: function calledImmediatelyAfter(spyFn) { + if (!this.called || !spyFn.called) { + return false; + } + + return this.callIds[this.callCount - 1] === spyFn.callIds[spyFn.callCount - 1] + 1; + }, + + withArgs: function() { + var args = slice(arguments); + + if (this.fakes) { + var matching = pop(this.matchingFakes(args, true)); + + if (matching) { + return matching; + } + } else { + extend.nonEnum(this, { fakes: [] }); + } + + var original = this; + var fake = this.instantiateFake(); + fake.matchingArguments = args; + fake.parent = this; + push(this.fakes, fake); + + if (original.defaultBehavior && original.defaultBehavior.promiseLibrary) { + fake.defaultBehavior = fake.defaultBehavior || createBehavior(fake); + fake.defaultBehavior.promiseLibrary = original.defaultBehavior.promiseLibrary; + } + + fake.withArgs = function() { + return original.withArgs.apply(original, arguments); + }; + + forEach(original.args, function(arg, i) { + if (!fake.matches(arg)) { + return; + } + + incrementCallCount.call(fake); + push(fake.thisValues, original.thisValues[i]); + push(fake.args, arg); + push(fake.returnValues, original.returnValues[i]); + push(fake.exceptions, original.exceptions[i]); + push(fake.callIds, original.callIds[i]); + }); + + createCallProperties.call(fake); + + return fake; + }, + + matchingFakes: function(args, strict) { + return filter.call(this.fakes || [], function(fake) { + return fake.matches(args, strict); + }); + }, + + matches: function(args, strict) { + var margs = this.matchingArguments; + + if (margs.length <= args.length && deepEqual(slice(args, 0, margs.length), margs)) { + return !strict || margs.length === args.length; + } + + return undefined; + }, + + printf: function(format) { + var spyInstance = this; + var args = slice(arguments, 1); + var formatter; + + return (format || "").replace(/%(.)/g, function(match, specifyer) { + formatter = spyApi.formatters[specifyer]; + + if (typeof formatter === "function") { + return String(formatter(spyInstance, args)); + } else if (!isNaN(parseInt(specifyer, 10))) { + return sinonFormat(args[specifyer - 1]); + } + + return "%" + specifyer; + }); + } +}; + +function delegateToCalls(method, matchAny, actual, returnsValues, notCalled, totalCallCount) { + spyApi[method] = function() { + if (!this.called) { + if (notCalled) { + return notCalled.apply(this, arguments); + } + return false; + } + + if (totalCallCount !== undefined && this.callCount !== totalCallCount) { + return false; + } + + var currentCall; + var matches = 0; + var returnValues = []; + + for (var i = 0, l = this.callCount; i < l; i += 1) { + currentCall = this.getCall(i); + var returnValue = currentCall[actual || method].apply(currentCall, arguments); + push(returnValues, returnValue); + if (returnValue) { + matches += 1; + + if (matchAny) { + return true; + } + } + } + + if (returnsValues) { + return returnValues; + } + return matches === this.callCount; + }; +} + +delegateToCalls("calledOn", true); +delegateToCalls("alwaysCalledOn", false, "calledOn"); +delegateToCalls("calledWith", true); +delegateToCalls("calledOnceWith", true, "calledWith", false, undefined, 1); +delegateToCalls("calledWithMatch", true); +delegateToCalls("alwaysCalledWith", false, "calledWith"); +delegateToCalls("alwaysCalledWithMatch", false, "calledWithMatch"); +delegateToCalls("calledWithExactly", true); +delegateToCalls("calledOnceWithExactly", true, "calledWithExactly", false, undefined, 1); +delegateToCalls("alwaysCalledWithExactly", false, "calledWithExactly"); +delegateToCalls("neverCalledWith", false, "notCalledWith", false, function() { + return true; +}); +delegateToCalls("neverCalledWithMatch", false, "notCalledWithMatch", false, function() { + return true; +}); +delegateToCalls("threw", true); +delegateToCalls("alwaysThrew", false, "threw"); +delegateToCalls("returned", true); +delegateToCalls("alwaysReturned", false, "returned"); +delegateToCalls("calledWithNew", true); +delegateToCalls("alwaysCalledWithNew", false, "calledWithNew"); +/* eslint-disable local-rules/no-prototype-methods */ +delegateToCalls("callArg", false, "callArgWith", true, function() { + throw new Error(this.toString() + " cannot call arg since it was not yet invoked."); +}); +spyApi.callArgWith = spyApi.callArg; +delegateToCalls("callArgOn", false, "callArgOnWith", true, function() { + throw new Error(this.toString() + " cannot call arg since it was not yet invoked."); +}); +spyApi.callArgOnWith = spyApi.callArgOn; +delegateToCalls("throwArg", false, "throwArg", false, function() { + throw new Error(this.toString() + " cannot throw arg since it was not yet invoked."); +}); +delegateToCalls("yield", false, "yield", true, function() { + throw new Error(this.toString() + " cannot yield since it was not yet invoked."); +}); +// "invokeCallback" is an alias for "yield" since "yield" is invalid in strict mode. +spyApi.invokeCallback = spyApi.yield; +delegateToCalls("yieldOn", false, "yieldOn", true, function() { + throw new Error(this.toString() + " cannot yield since it was not yet invoked."); +}); +delegateToCalls("yieldTo", false, "yieldTo", true, function(property) { + throw new Error( + this.toString() + " cannot yield to '" + valueToString(property) + "' since it was not yet invoked." + ); +}); +delegateToCalls("yieldToOn", false, "yieldToOn", true, function(property) { + throw new Error( + this.toString() + " cannot yield to '" + valueToString(property) + "' since it was not yet invoked." + ); +}); +/* eslint-enable local-rules/no-prototype-methods */ + +extend(spy, spyApi); +spy.spyCall = spyCall; +module.exports = spy; + +},{"./behavior":3,"./call":4,"./spy-formatters":13,"./util/core/extend":21,"./util/core/format":22,"./util/core/function-to-string":23,"./util/core/get-property-descriptor":25,"./util/core/is-es-module":26,"./util/core/wrap-method":33,"@sinonjs/commons":39,"@sinonjs/samsam":65}],15:[function(require,module,exports){ +"use strict"; + +var getPropertyDescriptor = require("./util/core/get-property-descriptor"); +var walk = require("./util/core/walk"); + +function stubEntireObject(stub, object) { + walk(object || {}, function(prop, propOwner) { + // we don't want to stub things like toString(), valueOf(), etc. so we only stub if the object + // is not Object.prototype + if ( + propOwner !== Object.prototype && + prop !== "constructor" && + typeof getPropertyDescriptor(propOwner, prop).value === "function" + ) { + stub(object, prop); + } + }); + + return object; +} + +module.exports = stubEntireObject; + +},{"./util/core/get-property-descriptor":25,"./util/core/walk":32}],16:[function(require,module,exports){ +"use strict"; + +var arrayProto = require("@sinonjs/commons").prototypes.array; +var behavior = require("./behavior"); +var behaviors = require("./default-behaviors"); +var hasOwnProperty = require("@sinonjs/commons").prototypes.object.hasOwnProperty; +var isNonExistentOwnProperty = require("./util/core/is-non-existent-own-property"); +var spy = require("./spy"); +var extend = require("./util/core/extend"); +var functionToString = require("./util/core/function-to-string"); +var getPropertyDescriptor = require("./util/core/get-property-descriptor"); +var isEsModule = require("./util/core/is-es-module"); +var wrapMethod = require("./util/core/wrap-method"); +var stubEntireObject = require("./stub-entire-object"); +var throwOnFalsyObject = require("./throw-on-falsy-object"); +var valueToString = require("@sinonjs/commons").valueToString; + +var forEach = arrayProto.forEach; +var pop = arrayProto.pop; +var slice = arrayProto.slice; +var sort = arrayProto.sort; + +function stub(object, property) { + if (arguments.length > 2) { + throw new TypeError("stub(obj, 'meth', fn) has been removed, see documentation"); + } + + if (isEsModule(object)) { + throw new TypeError("ES Modules cannot be stubbed"); + } + + throwOnFalsyObject.apply(null, arguments); + + if (isNonExistentOwnProperty(object, property)) { + throw new TypeError("Cannot stub non-existent own property " + valueToString(property)); + } + + var actualDescriptor = getPropertyDescriptor(object, property); + var isObject = typeof object === "object" || typeof object === "function"; + var isStubbingEntireObject = typeof property === "undefined" && isObject; + var isCreatingNewStub = !object && typeof property === "undefined"; + var isStubbingNonFuncProperty = + isObject && + typeof property !== "undefined" && + (typeof actualDescriptor === "undefined" || typeof actualDescriptor.value !== "function") && + typeof descriptor === "undefined"; + var isStubbingExistingMethod = + typeof object === "object" && + typeof actualDescriptor !== "undefined" && + typeof actualDescriptor.value === "function"; + var arity = isStubbingExistingMethod ? object[property].length : 0; + + if (isStubbingEntireObject) { + return stubEntireObject(stub, object); + } + + if (isCreatingNewStub) { + return stub.create(); + } + + var s = stub.create(arity); + + extend.nonEnum(s, { + rootObj: object, + propName: property, + restore: function restore() { + if (actualDescriptor !== undefined) { + Object.defineProperty(object, property, actualDescriptor); + return; + } + + delete object[property]; + } + }); + + return isStubbingNonFuncProperty ? s : wrapMethod(object, property, s); +} + +stub.createStubInstance = function(constructor, overrides) { + if (typeof constructor !== "function") { + throw new TypeError("The constructor should be a function."); + } + + var stubbedObject = stub(Object.create(constructor.prototype)); + + forEach(Object.keys(overrides || {}), function(propertyName) { + if (propertyName in stubbedObject) { + var value = overrides[propertyName]; + if (value && value.createStubInstance) { + stubbedObject[propertyName] = value; + } else { + stubbedObject[propertyName].returns(value); + } + } else { + throw new Error("Cannot stub " + propertyName + ". Property does not exist!"); + } + }); + return stubbedObject; +}; + +/*eslint-disable no-use-before-define*/ +function getParentBehaviour(stubInstance) { + return stubInstance.parent && getCurrentBehavior(stubInstance.parent); +} + +function getDefaultBehavior(stubInstance) { + return stubInstance.defaultBehavior || getParentBehaviour(stubInstance) || behavior.create(stubInstance); +} + +function getCurrentBehavior(stubInstance) { + var currentBehavior = stubInstance.behaviors[stubInstance.callCount - 1]; + return currentBehavior && currentBehavior.isPresent() ? currentBehavior : getDefaultBehavior(stubInstance); +} +/*eslint-enable no-use-before-define*/ + +var uuid = 0; + +var proto = { + create: function create(stubLength) { + var functionStub = function() { + var args = slice(arguments); + var matchings = functionStub.matchingFakes(args); + + var fnStub = + pop( + sort(matchings, function(a, b) { + return a.matchingArguments.length - b.matchingArguments.length; + }) + ) || functionStub; + return getCurrentBehavior(fnStub).invoke(this, arguments); + }; + + var orig = functionStub; + functionStub = spy.create(functionStub, stubLength); + + extend.nonEnum(functionStub, { + id: "stub#" + uuid++, + func: orig + }); + + extend(functionStub, stub); + + extend.nonEnum(functionStub, { + instantiateFake: stub.create, + displayName: "stub", + toString: functionToString, + + defaultBehavior: null, + behaviors: [] + }); + + return functionStub; + }, + + resetBehavior: function() { + var fakes = this.fakes || []; + + this.defaultBehavior = null; + this.behaviors = []; + + delete this.returnValue; + delete this.returnArgAt; + delete this.throwArgAt; + delete this.resolveArgAt; + delete this.fakeFn; + this.returnThis = false; + this.resolveThis = false; + + forEach(fakes, function(fake) { + fake.resetBehavior(); + }); + }, + + resetHistory: spy.resetHistory, + + reset: function() { + this.resetHistory(); + this.resetBehavior(); + }, + + onCall: function onCall(index) { + if (!this.behaviors[index]) { + this.behaviors[index] = behavior.create(this); + } + + return this.behaviors[index]; + }, + + onFirstCall: function onFirstCall() { + return this.onCall(0); + }, + + onSecondCall: function onSecondCall() { + return this.onCall(1); + }, + + onThirdCall: function onThirdCall() { + return this.onCall(2); + } +}; + +forEach(Object.keys(behavior), function(method) { + if ( + hasOwnProperty(behavior, method) && + !hasOwnProperty(proto, method) && + method !== "create" && + method !== "withArgs" && + method !== "invoke" + ) { + proto[method] = behavior.createBehavior(method); + } +}); + +forEach(Object.keys(behaviors), function(method) { + if (hasOwnProperty(behaviors, method) && !hasOwnProperty(proto, method)) { + behavior.addBehavior(stub, method, behaviors[method]); + } +}); + +extend(stub, proto); +module.exports = stub; + +},{"./behavior":3,"./default-behaviors":8,"./spy":14,"./stub-entire-object":15,"./throw-on-falsy-object":17,"./util/core/extend":21,"./util/core/function-to-string":23,"./util/core/get-property-descriptor":25,"./util/core/is-es-module":26,"./util/core/is-non-existent-own-property":27,"./util/core/wrap-method":33,"@sinonjs/commons":39}],17:[function(require,module,exports){ +"use strict"; +var valueToString = require("@sinonjs/commons").valueToString; + +function throwOnFalsyObject(object, property) { + if (property && !object) { + var type = object === null ? "null" : "undefined"; + throw new Error("Trying to stub property '" + valueToString(property) + "' of " + type); + } +} + +module.exports = throwOnFalsyObject; + +},{"@sinonjs/commons":39}],18:[function(require,module,exports){ +"use strict"; + +module.exports = { + injectIntoThis: true, + injectInto: null, + properties: ["spy", "stub", "mock", "clock", "server", "requests"], + useFakeTimers: true, + useFakeServer: true +}; + +},{}],19:[function(require,module,exports){ +/* eslint-disable no-console */ +"use strict"; + +// wrap returns a function that will invoke the supplied function and print a deprecation warning to the console each +// time it is called. +exports.wrap = function(func, msg) { + var wrapped = function() { + exports.printWarning(msg); + return func.apply(this, arguments); + }; + if (func.prototype) { + wrapped.prototype = func.prototype; + } + return wrapped; +}; + +// defaultMsg returns a string which can be supplied to `wrap()` to notify the user that a particular part of the +// sinon API has been deprecated. +/* istanbul ignore next */ +exports.defaultMsg = function(funcName) { + return "sinon." + funcName + " is deprecated and will be removed from the public API in a future version of sinon."; +}; + +exports.printWarning = function(msg) { + // Watch out for IE7 and below! :( + if (typeof console !== "undefined") { + /* istanbul ignore else */ + if (console.info) { + console.info(msg); + } else { + console.log(msg); + } + } +}; + +},{}],20:[function(require,module,exports){ +"use strict"; + +var arrayProto = require("@sinonjs/commons").prototypes.array; +var reduce = arrayProto.reduce; + +module.exports = function exportAsyncBehaviors(behaviorMethods) { + return reduce( + Object.keys(behaviorMethods), + function(acc, method) { + // need to avoid creating another async versions of the newly added async methods + if (method.match(/^(callsArg|yields)/) && !method.match(/Async/)) { + acc[method + "Async"] = function() { + var result = behaviorMethods[method].apply(this, arguments); + this.callbackAsync = true; + return result; + }; + } + return acc; + }, + {} + ); +}; + +},{"@sinonjs/commons":39}],21:[function(require,module,exports){ +"use strict"; + +var arrayProto = require("@sinonjs/commons").prototypes.array; +var hasOwnProperty = require("@sinonjs/commons").prototypes.object.hasOwnProperty; + +var join = arrayProto.join; +var push = arrayProto.push; +var slice = arrayProto.slice; + +// Adapted from https://developer.mozilla.org/en/docs/ECMAScript_DontEnum_attribute#JScript_DontEnum_Bug +var hasDontEnumBug = (function() { + var obj = { + constructor: function() { + return "0"; + }, + toString: function() { + return "1"; + }, + valueOf: function() { + return "2"; + }, + toLocaleString: function() { + return "3"; + }, + prototype: function() { + return "4"; + }, + isPrototypeOf: function() { + return "5"; + }, + propertyIsEnumerable: function() { + return "6"; + }, + hasOwnProperty: function() { + return "7"; + }, + length: function() { + return "8"; + }, + unique: function() { + return "9"; + } + }; + + var result = []; + for (var prop in obj) { + if (hasOwnProperty(obj, prop)) { + push(result, obj[prop]()); + } + } + return join(result, "") !== "0123456789"; +})(); + +function extendCommon(target, sources, doCopy) { + var source, i, prop; + + for (i = 0; i < sources.length; i++) { + source = sources[i]; + + for (prop in source) { + if (hasOwnProperty(source, prop)) { + doCopy(target, source, prop); + } + } + + // Make sure we copy (own) toString method even when in JScript with DontEnum bug + // See https://developer.mozilla.org/en/docs/ECMAScript_DontEnum_attribute#JScript_DontEnum_Bug + if (hasDontEnumBug && hasOwnProperty(source, "toString") && source.toString !== target.toString) { + target.toString = source.toString; + } + } + + return target; +} + +/** Public: Extend target in place with all (own) properties from sources in-order. Thus, last source will + * override properties in previous sources. + * + * @arg {Object} target - The Object to extend + * @arg {Object[]} sources - Objects to copy properties from. + * + * @returns {Object} the extended target + */ +module.exports = function extend(target /*, sources */) { + var sources = slice(arguments, 1); + + return extendCommon(target, sources, function copyValue(dest, source, prop) { + dest[prop] = source[prop]; + }); +}; + +/** Public: Extend target in place with all (own) properties from sources in-order. Thus, last source will + * override properties in previous sources. Define the properties as non enumerable. + * + * @arg {Object} target - The Object to extend + * @arg {Object[]} sources - Objects to copy properties from. + * + * @returns {Object} the extended target + */ +module.exports.nonEnum = function extendNonEnum(target /*, sources */) { + var sources = slice(arguments, 1); + + return extendCommon(target, sources, function copyProperty(dest, source, prop) { + Object.defineProperty(dest, prop, { + value: source[prop], + enumerable: false, + configurable: true, + writable: true + }); + }); +}; + +},{"@sinonjs/commons":39}],22:[function(require,module,exports){ +"use strict"; + +var formatio = require("@sinonjs/formatio"); + +var formatter = formatio.configure({ + quoteStrings: false, + limitChildrenCount: 250 +}); + +var customFormatter; + +function format() { + if (customFormatter) { + return customFormatter.apply(null, arguments); + } + + return formatter.ascii.apply(formatter, arguments); +} + +format.setFormatter = function(aCustomFormatter) { + if (typeof aCustomFormatter !== "function") { + throw new Error("format.setFormatter must be called with a function"); + } + + customFormatter = aCustomFormatter; +}; + +module.exports = format; + +},{"@sinonjs/formatio":49}],23:[function(require,module,exports){ +"use strict"; + +module.exports = function toString() { + var i, prop, thisValue; + if (this.getCall && this.callCount) { + i = this.callCount; + + while (i--) { + thisValue = this.getCall(i).thisValue; + + for (prop in thisValue) { + if (thisValue[prop] === this) { + return prop; + } + } + } + } + + return this.displayName || "sinon fake"; +}; + +},{}],24:[function(require,module,exports){ +"use strict"; + +/* istanbul ignore next : not testing that setTimeout works */ +function nextTick(callback) { + setTimeout(callback, 0); +} + +module.exports = function getNextTick(process, setImmediate) { + if (typeof process === "object" && typeof process.nextTick === "function") { + return process.nextTick; + } + + if (typeof setImmediate === "function") { + return setImmediate; + } + + return nextTick; +}; + +},{}],25:[function(require,module,exports){ +"use strict"; + +module.exports = function getPropertyDescriptor(object, property) { + var proto = object; + var descriptor; + + while (proto && !(descriptor = Object.getOwnPropertyDescriptor(proto, property))) { + proto = Object.getPrototypeOf(proto); + } + return descriptor; +}; + +},{}],26:[function(require,module,exports){ +"use strict"; + +/** + * Verify if an object is a ECMAScript Module + * + * As the exports from a module is immutable we cannot alter the exports + * using spies or stubs. Let the consumer know this to avoid bug reports + * on weird error messages. + * + * @param {Object} object The object to examine + * + * @returns {Boolean} true when the object is a module + */ +module.exports = function(object) { + return ( + object && typeof Symbol !== "undefined" && object[Symbol.toStringTag] === "Module" && Object.isSealed(object) + ); +}; + +},{}],27:[function(require,module,exports){ +"use strict"; + +function isNonExistentOwnProperty(object, property) { + return object && typeof property !== "undefined" && !(property in object); +} + +module.exports = isNonExistentOwnProperty; + +},{}],28:[function(require,module,exports){ +"use strict"; + +var getPropertyDescriptor = require("./get-property-descriptor"); + +function isPropertyConfigurable(obj, propName) { + var propertyDescriptor = getPropertyDescriptor(obj, propName); + + return propertyDescriptor ? propertyDescriptor.configurable : true; +} + +module.exports = isPropertyConfigurable; + +},{"./get-property-descriptor":25}],29:[function(require,module,exports){ +(function (global){ +"use strict"; + +var getNextTick = require("./get-next-tick"); + +/* istanbul ignore next */ +var root = typeof window !== "undefined" ? window : global; + +module.exports = getNextTick(root.process, root.setImmediate); + +}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {}) + +},{"./get-next-tick":24}],30:[function(require,module,exports){ +"use strict"; + +var array = [null, "once", "twice", "thrice"]; + +module.exports = function timesInWords(count) { + return array[count] || (count || 0) + " times"; +}; + +},{}],31:[function(require,module,exports){ +"use strict"; + +var forEach = Array.prototype.forEach; + +function usePromiseLibrary(library, fakes) { + if (typeof library === "undefined") { + return; + } + + if (Array.isArray(fakes)) { + forEach.call(fakes, usePromiseLibrary.bind(null, library)); + + return; + } + + if (typeof fakes.usingPromise === "function") { + fakes.usingPromise(library); + } +} + +module.exports = usePromiseLibrary; + +},{}],32:[function(require,module,exports){ +"use strict"; + +var forEach = require("@sinonjs/commons").prototypes.array.forEach; + +function walkInternal(obj, iterator, context, originalObj, seen) { + var proto, prop; + + if (typeof Object.getOwnPropertyNames !== "function") { + // We explicitly want to enumerate through all of the prototype's properties + // in this case, therefore we deliberately leave out an own property check. + /* eslint-disable-next-line guard-for-in */ + for (prop in obj) { + iterator.call(context, obj[prop], prop, obj); + } + + return; + } + + forEach(Object.getOwnPropertyNames(obj), function(k) { + if (seen[k] !== true) { + seen[k] = true; + var target = typeof Object.getOwnPropertyDescriptor(obj, k).get === "function" ? originalObj : obj; + iterator.call(context, k, target); + } + }); + + proto = Object.getPrototypeOf(obj); + if (proto) { + walkInternal(proto, iterator, context, originalObj, seen); + } +} + +/* Walks the prototype chain of an object and iterates over every own property + * name encountered. The iterator is called in the same fashion that Array.prototype.forEach + * works, where it is passed the value, key, and own object as the 1st, 2nd, and 3rd positional + * argument, respectively. In cases where Object.getOwnPropertyNames is not available, walk will + * default to using a simple for..in loop. + * + * obj - The object to walk the prototype chain for. + * iterator - The function to be called on each pass of the walk. + * context - (Optional) When given, the iterator will be called with this object as the receiver. + */ +module.exports = function walk(obj, iterator, context) { + return walkInternal(obj, iterator, context, obj, {}); +}; + +},{"@sinonjs/commons":39}],33:[function(require,module,exports){ +"use strict"; + +var getPropertyDescriptor = require("./get-property-descriptor"); +var extend = require("./extend"); +var hasOwnProperty = require("@sinonjs/commons").prototypes.object.hasOwnProperty; +var valueToString = require("@sinonjs/commons").valueToString; + +function isFunction(obj) { + return typeof obj === "function" || Boolean(obj && obj.constructor && obj.call && obj.apply); +} + +function mirrorProperties(target, source) { + for (var prop in source) { + if (!hasOwnProperty(target, prop)) { + target[prop] = source[prop]; + } + } +} + +// Cheap way to detect if we have ES5 support. +var hasES5Support = "keys" in Object; + +module.exports = function wrapMethod(object, property, method) { + if (!object) { + throw new TypeError("Should wrap property of object"); + } + + if (typeof method !== "function" && typeof method !== "object") { + throw new TypeError("Method wrapper should be a function or a property descriptor"); + } + + function checkWrappedMethod(wrappedMethod) { + var error; + + if (!isFunction(wrappedMethod)) { + error = new TypeError( + "Attempted to wrap " + typeof wrappedMethod + " property " + valueToString(property) + " as function" + ); + } else if (wrappedMethod.restore && wrappedMethod.restore.sinon) { + error = new TypeError("Attempted to wrap " + valueToString(property) + " which is already wrapped"); + } else if (wrappedMethod.calledBefore) { + var verb = wrappedMethod.returns ? "stubbed" : "spied on"; + error = new TypeError("Attempted to wrap " + valueToString(property) + " which is already " + verb); + } + + if (error) { + if (wrappedMethod && wrappedMethod.stackTraceError) { + error.stack += "\n--------------\n" + wrappedMethod.stackTraceError.stack; + } + throw error; + } + } + + var error, wrappedMethod, i, wrappedMethodDesc; + + function simplePropertyAssignment() { + wrappedMethod = object[property]; + checkWrappedMethod(wrappedMethod); + object[property] = method; + method.displayName = property; + } + + // Firefox has a problem when using hasOwn.call on objects from other frames. + /* eslint-disable-next-line local-rules/no-prototype-methods */ + var owned = object.hasOwnProperty ? object.hasOwnProperty(property) : hasOwnProperty(object, property); + + if (hasES5Support) { + var methodDesc = typeof method === "function" ? { value: method } : method; + wrappedMethodDesc = getPropertyDescriptor(object, property); + + if (!wrappedMethodDesc) { + error = new TypeError( + "Attempted to wrap " + typeof wrappedMethod + " property " + property + " as function" + ); + } else if (wrappedMethodDesc.restore && wrappedMethodDesc.restore.sinon) { + error = new TypeError("Attempted to wrap " + property + " which is already wrapped"); + } + if (error) { + if (wrappedMethodDesc && wrappedMethodDesc.stackTraceError) { + error.stack += "\n--------------\n" + wrappedMethodDesc.stackTraceError.stack; + } + throw error; + } + + var types = Object.keys(methodDesc); + for (i = 0; i < types.length; i++) { + wrappedMethod = wrappedMethodDesc[types[i]]; + checkWrappedMethod(wrappedMethod); + } + + mirrorProperties(methodDesc, wrappedMethodDesc); + for (i = 0; i < types.length; i++) { + mirrorProperties(methodDesc[types[i]], wrappedMethodDesc[types[i]]); + } + Object.defineProperty(object, property, methodDesc); + + // catch failing assignment + // this is the converse of the check in `.restore` below + if (typeof method === "function" && object[property] !== method) { + // correct any wrongdoings caused by the defineProperty call above, + // such as adding new items (if object was a Storage object) + delete object[property]; + simplePropertyAssignment(); + } + } else { + simplePropertyAssignment(); + } + + extend.nonEnum(method, { + displayName: property, + + // Set up an Error object for a stack trace which can be used later to find what line of + // code the original method was created on. + stackTraceError: new Error("Stack Trace for original"), + + restore: function() { + // For prototype properties try to reset by delete first. + // If this fails (ex: localStorage on mobile safari) then force a reset + // via direct assignment. + if (!owned) { + // In some cases `delete` may throw an error + try { + delete object[property]; + } catch (e) {} // eslint-disable-line no-empty + // For native code functions `delete` fails without throwing an error + // on Chrome < 43, PhantomJS, etc. + } else if (hasES5Support) { + Object.defineProperty(object, property, wrappedMethodDesc); + } + + if (hasES5Support) { + var descriptor = getPropertyDescriptor(object, property); + if (descriptor && descriptor.value === method) { + object[property] = wrappedMethod; + } + } else { + // Use strict equality comparison to check failures then force a reset + // via direct assignment. + if (object[property] === method) { + object[property] = wrappedMethod; + } + } + } + }); + + method.wrappedMethod = wrappedMethod; + + method.restore.sinon = true; + + if (!hasES5Support) { + mirrorProperties(method, wrappedMethod); + } + + return method; +}; + +},{"./extend":21,"./get-property-descriptor":25,"@sinonjs/commons":39}],34:[function(require,module,exports){ +"use strict"; + +var extend = require("./core/extend"); +var llx = require("lolex"); + +function createClock(config, globalCtx) { + var llxCtx = llx; + if (globalCtx !== null && typeof globalCtx === "object") { + llxCtx = llx.withGlobal(globalCtx); + } + var clock = llxCtx.install(config); + clock.restore = clock.uninstall; + return clock; +} + +/** + * @param {number|Date|Object} dateOrConfig The unix epoch value to install with (default 0) + * @returns {Object} Returns a lolex clock instance + */ +exports.useFakeTimers = function(dateOrConfig) { + var hasArguments = typeof dateOrConfig !== "undefined"; + var argumentIsDateLike = + (typeof dateOrConfig === "number" || dateOrConfig instanceof Date) && arguments.length === 1; + var argumentIsObject = dateOrConfig !== null && typeof dateOrConfig === "object" && arguments.length === 1; + + if (!hasArguments) { + return createClock({ + now: 0 + }); + } + + if (argumentIsDateLike) { + return createClock({ + now: dateOrConfig + }); + } + + if (argumentIsObject) { + var config = extend.nonEnum({}, dateOrConfig); + var globalCtx = config.global; + delete config.global; + return createClock(config, globalCtx); + } + + throw new TypeError("useFakeTimers expected epoch or config object. See https://github.com/sinonjs/sinon"); +}; + +exports.clock = { + create: function(now) { + return llx.createClock(now); + } +}; + +exports.timers = { + setTimeout: setTimeout, + clearTimeout: clearTimeout, + setImmediate: typeof setImmediate !== "undefined" ? setImmediate : undefined, + clearImmediate: typeof clearImmediate !== "undefined" ? clearImmediate : undefined, + setInterval: setInterval, + clearInterval: clearInterval, + Date: Date +}; + +},{"./core/extend":21,"lolex":73}],35:[function(require,module,exports){ +"use strict"; + +var every = require("./prototypes/array").every; + +function hasCallsLeft(callMap, spy) { + if (callMap[spy.id] === undefined) { + callMap[spy.id] = 0; + } + + return callMap[spy.id] < spy.callCount; +} + +function checkAdjacentCalls(callMap, spy, index, spies) { + var calledBeforeNext = true; + + if (index !== spies.length - 1) { + calledBeforeNext = spy.calledBefore(spies[index + 1]); + } + + if (hasCallsLeft(callMap, spy) && calledBeforeNext) { + callMap[spy.id] += 1; + return true; + } + + return false; +} + +module.exports = function calledInOrder(spies) { + var callMap = {}; + // eslint-disable-next-line no-underscore-dangle + var _spies = arguments.length > 1 ? arguments : spies; + + return every(_spies, checkAdjacentCalls.bind(null, callMap)); +}; + +},{"./prototypes/array":41}],36:[function(require,module,exports){ +"use strict"; + +var functionName = require("./function-name"); + +module.exports = function className(value) { + return ( + (value.constructor && value.constructor.name) || + // The next branch is for IE11 support only: + // Because the name property is not set on the prototype + // of the Function object, we finally try to grab the + // name from its definition. This will never be reached + // in node, so we are not able to test this properly. + // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/name + (typeof value.constructor === "function" && + /* istanbul ignore next */ + functionName(value.constructor)) || + null + ); +}; + +},{"./function-name":38}],37:[function(require,module,exports){ +"use strict"; + +// This is an `every` implementation that works for all iterables +module.exports = function every(obj, fn) { + var pass = true; + + try { + /* eslint-disable-next-line local-rules/no-prototype-methods */ + obj.forEach(function() { + if (!fn.apply(this, arguments)) { + // Throwing an error is the only way to break `forEach` + throw new Error(); + } + }); + } catch (e) { + pass = false; + } + + return pass; +}; + +},{}],38:[function(require,module,exports){ +"use strict"; + +module.exports = function functionName(func) { + if (!func) { + return ""; + } + + return ( + func.displayName || + func.name || + // Use function decomposition as a last resort to get function + // name. Does not rely on function decomposition to work - if it + // doesn't debugging will be slightly less informative + // (i.e. toString will say 'spy' rather than 'myFunc'). + (String(func).match(/function ([^\s(]+)/) || [])[1] + ); +}; + +},{}],39:[function(require,module,exports){ +"use strict"; + +module.exports = { + calledInOrder: require("./called-in-order"), + className: require("./class-name"), + every: require("./every"), + functionName: require("./function-name"), + orderByFirstCall: require("./order-by-first-call"), + prototypes: require("./prototypes"), + typeOf: require("./type-of"), + valueToString: require("./value-to-string") +}; + +},{"./called-in-order":35,"./class-name":36,"./every":37,"./function-name":38,"./order-by-first-call":40,"./prototypes":44,"./type-of":47,"./value-to-string":48}],40:[function(require,module,exports){ +"use strict"; + +var sort = require("./prototypes/array").sort; +var slice = require("./prototypes/array").slice; + +function comparator(a, b) { + // uuid, won't ever be equal + var aCall = a.getCall(0); + var bCall = b.getCall(0); + var aId = (aCall && aCall.callId) || -1; + var bId = (bCall && bCall.callId) || -1; + + return aId < bId ? -1 : 1; +} + +module.exports = function orderByFirstCall(spies) { + return sort(slice(spies), comparator); +}; + +},{"./prototypes/array":41}],41:[function(require,module,exports){ +"use strict"; + +var copyPrototype = require("./copy-prototype"); + +module.exports = copyPrototype(Array.prototype); + +},{"./copy-prototype":42}],42:[function(require,module,exports){ +"use strict"; + +var call = Function.call; + +module.exports = function copyPrototypeMethods(prototype) { + /* eslint-disable local-rules/no-prototype-methods */ + return Object.getOwnPropertyNames(prototype).reduce(function(result, name) { + // ignore size because it throws from Map + if ( + name !== "size" && + name !== "caller" && + name !== "callee" && + name !== "arguments" && + typeof prototype[name] === "function" + ) { + result[name] = call.bind(prototype[name]); + } + + return result; + }, Object.create(null)); +}; + +},{}],43:[function(require,module,exports){ +"use strict"; + +var copyPrototype = require("./copy-prototype"); + +module.exports = copyPrototype(Function.prototype); + +},{"./copy-prototype":42}],44:[function(require,module,exports){ +"use strict"; + +module.exports = { + array: require("./array"), + function: require("./function"), + object: require("./object"), + string: require("./string") +}; + +},{"./array":41,"./function":43,"./object":45,"./string":46}],45:[function(require,module,exports){ +"use strict"; + +var copyPrototype = require("./copy-prototype"); + +module.exports = copyPrototype(Object.prototype); + +},{"./copy-prototype":42}],46:[function(require,module,exports){ +"use strict"; + +var copyPrototype = require("./copy-prototype"); + +module.exports = copyPrototype(String.prototype); + +},{"./copy-prototype":42}],47:[function(require,module,exports){ +"use strict"; + +var type = require("type-detect"); + +module.exports = function typeOf(value) { + return type(value).toLowerCase(); +}; + +},{"type-detect":89}],48:[function(require,module,exports){ +"use strict"; + +function valueToString(value) { + if (value && value.toString) { + /* eslint-disable-next-line local-rules/no-prototype-methods */ + return value.toString(); + } + return String(value); +} + +module.exports = valueToString; + +},{}],49:[function(require,module,exports){ +(function (global){ +"use strict"; + +var samsam = require("@sinonjs/samsam"); +var functionName = require("@sinonjs/commons").functionName; +var typeOf = require("@sinonjs/commons").typeOf; + +var formatio = { + excludeConstructors: ["Object", /^.$/], + quoteStrings: true, + limitChildrenCount: 0 +}; + +var specialObjects = []; +if (typeof global !== "undefined") { + specialObjects.push({ object: global, value: "[object global]" }); +} +if (typeof document !== "undefined") { + specialObjects.push({ + object: document, + value: "[object HTMLDocument]" + }); +} +if (typeof window !== "undefined") { + specialObjects.push({ object: window, value: "[object Window]" }); +} + +function constructorName(f, object) { + var name = functionName(object && object.constructor); + var excludes = f.excludeConstructors || + formatio.excludeConstructors || []; + + var i, l; + for (i = 0, l = excludes.length; i < l; ++i) { + if (typeof excludes[i] === "string" && excludes[i] === name) { + return ""; + } else if (excludes[i].test && excludes[i].test(name)) { + return ""; + } + } + + return name; +} + +function isCircular(object, objects) { + if (typeof object !== "object") { return false; } + var i, l; + for (i = 0, l = objects.length; i < l; ++i) { + if (objects[i] === object) { return true; } + } + return false; +} + +function ascii(f, object, processed, indent) { + if (typeof object === "string") { + if (object.length === 0) { return "(empty string)"; } + var qs = f.quoteStrings; + var quote = typeof qs !== "boolean" || qs; + return processed || quote ? "\"" + object + "\"" : object; + } + + if (typeof object === "symbol") { + return object.toString(); + } + + if (typeof object === "function" && !(object instanceof RegExp)) { + return ascii.func(object); + } + + processed = processed || []; + + if (isCircular(object, processed)) { return "[Circular]"; } + + if (typeOf(object) === "array") { + return ascii.array.call(f, object, processed); + } + + if (!object) { return String((1 / object) === -Infinity ? "-0" : object); } + if (samsam.isElement(object)) { return ascii.element(object); } + + if (typeof object.toString === "function" && + object.toString !== Object.prototype.toString) { + return object.toString(); + } + + var i, l; + for (i = 0, l = specialObjects.length; i < l; i++) { + if (object === specialObjects[i].object) { + return specialObjects[i].value; + } + } + + if (samsam.isSet(object)) { + return ascii.set.call(f, object, processed); + } + + return ascii.object.call(f, object, processed, indent); +} + +ascii.func = function (func) { + var funcName = functionName(func) || ""; + return "function " + funcName + "() {}"; +}; + +function delimit(str, delimiters) { + delimiters = delimiters || ["[", "]"]; + return delimiters[0] + str + delimiters[1]; +} + +ascii.array = function (array, processed, delimiters) { + processed = processed || []; + processed.push(array); + var pieces = []; + var i, l; + l = (this.limitChildrenCount > 0) ? + Math.min(this.limitChildrenCount, array.length) : array.length; + + for (i = 0; i < l; ++i) { + pieces.push(ascii(this, array[i], processed)); + } + + if (l < array.length) { + pieces.push("[... " + (array.length - l) + " more elements]"); + } + + return delimit(pieces.join(", "), delimiters); +}; + +ascii.set = function (set, processed) { + return ascii.array.call(this, Array.from(set), processed, ["Set {", "}"]); +}; + +ascii.object = function (object, processed, indent) { + processed = processed || []; + processed.push(object); + indent = indent || 0; + var pieces = []; + var symbols = typeof Object.getOwnPropertySymbols === "function" + ? Object.getOwnPropertySymbols(object) + : []; + var properties = Object.keys(object).sort().concat(symbols); + var length = 3; + var prop, str, obj, i, k, l; + l = (this.limitChildrenCount > 0) ? + Math.min(this.limitChildrenCount, properties.length) : properties.length; + + for (i = 0; i < l; ++i) { + prop = properties[i]; + obj = object[prop]; + + if (isCircular(obj, processed)) { + str = "[Circular]"; + } else { + str = ascii(this, obj, processed, indent + 2); + } + + str = ( + typeof prop === "string" && /\s/.test(prop) ? + "\"" + prop + "\"" : prop.toString() + ) + ": " + str; + length += str.length; + pieces.push(str); + } + + var cons = constructorName(this, object); + var prefix = cons ? "[" + cons + "] " : ""; + var is = ""; + for (i = 0, k = indent; i < k; ++i) { is += " "; } + + if (l < properties.length) + {pieces.push("[... " + (properties.length - l) + " more elements]");} + + if (length + indent > 80) { + return prefix + "{\n " + is + pieces.join(",\n " + is) + "\n" + + is + "}"; + } + return prefix + "{ " + pieces.join(", ") + " }"; +}; + +ascii.element = function (element) { + var tagName = element.tagName.toLowerCase(); + var attrs = element.attributes; + var pairs = []; + var attr, attrName, i, l, val; + + for (i = 0, l = attrs.length; i < l; ++i) { + attr = attrs.item(i); + attrName = attr.nodeName.toLowerCase().replace("html:", ""); + val = attr.nodeValue; + if (attrName !== "contenteditable" || val !== "inherit") { + if (val) { pairs.push(attrName + "=\"" + val + "\""); } + } + } + + var formatted = "<" + tagName + (pairs.length > 0 ? " " : ""); + // SVG elements have undefined innerHTML + var content = element.innerHTML || ""; + + if (content.length > 20) { + content = content.substr(0, 20) + "[...]"; + } + + var res = formatted + pairs.join(" ") + ">" + content + + ""; + + return res.replace(/ contentEditable="inherit"/, ""); +}; + +function Formatio(options) { + // eslint-disable-next-line guard-for-in + for (var opt in options) { + this[opt] = options[opt]; + } +} + +Formatio.prototype = { + functionName: functionName, + + configure: function (options) { + return new Formatio(options); + }, + + constructorName: function (object) { + return constructorName(this, object); + }, + + ascii: function (object, processed, indent) { + return ascii(this, object, processed, indent); + } +}; + +module.exports = Formatio.prototype; + +}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {}) + +},{"@sinonjs/commons":39,"@sinonjs/samsam":65}],50:[function(require,module,exports){ +"use strict"; + +var valueToString = require("@sinonjs/commons").valueToString; + +var getClass = require("./get-class"); +var identical = require("./identical"); +var isArguments = require("./is-arguments"); +var isDate = require("./is-date"); +var isElement = require("./is-element"); +var isNaN = require("./is-nan"); +var isObject = require("./is-object"); +var isSet = require("./is-set"); +var isSubset = require("./is-subset"); +var getClassName = require("./get-class-name"); + +var every = Array.prototype.every; +var getTime = Date.prototype.getTime; +var hasOwnProperty = Object.prototype.hasOwnProperty; +var indexOf = Array.prototype.indexOf; +var keys = Object.keys; + +/** + * @name samsam.deepEqual + * @param Object first + * @param Object second + * + * Deep equal comparison. Two values are "deep equal" if: + * + * - They are equal, according to samsam.identical + * - They are both date objects representing the same time + * - They are both arrays containing elements that are all deepEqual + * - They are objects with the same set of properties, and each property + * in ``first`` is deepEqual to the corresponding property in ``second`` + * + * Supports cyclic objects. + */ +function deepEqualCyclic(first, second, match) { + // used for cyclic comparison + // contain already visited objects + var objects1 = []; + var objects2 = []; + // contain pathes (position in the object structure) + // of the already visited objects + // indexes same as in objects arrays + var paths1 = []; + var paths2 = []; + // contains combinations of already compared objects + // in the manner: { "$1['ref']$2['ref']": true } + var compared = {}; + + // does the recursion for the deep equal check + return (function deepEqual(obj1, obj2, path1, path2) { + // If both are matchers they must be the same instance in order to be + // considered equal If we didn't do that we would end up running one + // matcher against the other + if (match && match.isMatcher(obj2)) { + if (match.isMatcher(obj1)) { + return obj1 === obj2; + } + return obj2.test(obj1); + } + + var type1 = typeof obj1; + var type2 = typeof obj2; + + // == null also matches undefined + if ( + obj1 === obj2 || + isNaN(obj1) || + isNaN(obj2) || + obj1 == null || + obj2 == null || + type1 !== "object" || + type2 !== "object" + ) { + return identical(obj1, obj2); + } + + // Elements are only equal if identical(expected, actual) + if (isElement(obj1) || isElement(obj2)) { + return false; + } + + var isDate1 = isDate(obj1); + var isDate2 = isDate(obj2); + if (isDate1 || isDate2) { + if ( + !isDate1 || + !isDate2 || + getTime.call(obj1) !== getTime.call(obj2) + ) { + return false; + } + } + + if (obj1 instanceof RegExp && obj2 instanceof RegExp) { + if (valueToString(obj1) !== valueToString(obj2)) { + return false; + } + } + + if (obj1 instanceof Error && obj2 instanceof Error) { + return obj1 === obj2; + } + + var class1 = getClass(obj1); + var class2 = getClass(obj2); + var keys1 = keys(obj1); + var keys2 = keys(obj2); + var name1 = getClassName(obj1); + var name2 = getClassName(obj2); + + if (isArguments(obj1) || isArguments(obj2)) { + if (obj1.length !== obj2.length) { + return false; + } + } else { + if ( + type1 !== type2 || + class1 !== class2 || + keys1.length !== keys2.length || + (name1 && name2 && name1 !== name2) + ) { + return false; + } + } + + if (isSet(obj1) || isSet(obj2)) { + if (!isSet(obj1) || !isSet(obj2) || obj1.size !== obj2.size) { + return false; + } + + return isSubset(obj1, obj2, deepEqual); + } + + return every.call(keys1, function(key) { + if (!hasOwnProperty.call(obj2, key)) { + return false; + } + + var value1 = obj1[key]; + var value2 = obj2[key]; + var isObject1 = isObject(value1); + var isObject2 = isObject(value2); + // determines, if the objects were already visited + // (it's faster to check for isObject first, than to + // get -1 from getIndex for non objects) + var index1 = isObject1 ? indexOf.call(objects1, value1) : -1; + var index2 = isObject2 ? indexOf.call(objects2, value2) : -1; + // determines the new paths of the objects + // - for non cyclic objects the current path will be extended + // by current property name + // - for cyclic objects the stored path is taken + var newPath1 = + index1 !== -1 + ? paths1[index1] + : path1 + "[" + JSON.stringify(key) + "]"; + var newPath2 = + index2 !== -1 + ? paths2[index2] + : path2 + "[" + JSON.stringify(key) + "]"; + var combinedPath = newPath1 + newPath2; + + // stop recursion if current objects are already compared + if (compared[combinedPath]) { + return true; + } + + // remember the current objects and their paths + if (index1 === -1 && isObject1) { + objects1.push(value1); + paths1.push(newPath1); + } + if (index2 === -1 && isObject2) { + objects2.push(value2); + paths2.push(newPath2); + } + + // remember that the current objects are already compared + if (isObject1 && isObject2) { + compared[combinedPath] = true; + } + + // End of cyclic logic + + // neither value1 nor value2 is a cycle + // continue with next level + return deepEqual(value1, value2, newPath1, newPath2); + }); + })(first, second, "$1", "$2"); +} + +deepEqualCyclic.use = function(match) { + return function(a, b) { + return deepEqualCyclic(a, b, match); + }; +}; + +module.exports = deepEqualCyclic; + +},{"./get-class":52,"./get-class-name":51,"./identical":53,"./is-arguments":54,"./is-date":55,"./is-element":56,"./is-nan":57,"./is-object":59,"./is-set":60,"./is-subset":61,"@sinonjs/commons":39}],51:[function(require,module,exports){ +"use strict"; + +var valueToString = require("@sinonjs/commons").valueToString; + +var re = /function (\w+)\s*\(/; + +function getClassName(value) { + if (value.constructor && "name" in value.constructor) { + return value.constructor.name; + } + + if (typeof value.constructor === "function") { + var match = valueToString(value.constructor).match(re); + if (match.length > 1) { + return match[1]; + } + } + + return null; +} + +module.exports = getClassName; + +},{"@sinonjs/commons":39}],52:[function(require,module,exports){ +"use strict"; + +var o = Object.prototype; + +function getClass(value) { + // Returns the internal [[Class]] by calling Object.prototype.toString + // with the provided value as this. Return value is a string, naming the + // internal class, e.g. "Array" + return o.toString.call(value).split(/[ \]]/)[1]; +} + +module.exports = getClass; + +},{}],53:[function(require,module,exports){ +"use strict"; + +var isNaN = require("./is-nan"); +var isNegZero = require("./is-neg-zero"); + +/** + * @name samsam.equal + * @param Object obj1 + * @param Object obj2 + * + * Returns ``true`` if two objects are strictly equal. Compared to + * ``===`` there are two exceptions: + * + * - NaN is considered equal to NaN + * - -0 and +0 are not considered equal + */ +function identical(obj1, obj2) { + if (obj1 === obj2 || (isNaN(obj1) && isNaN(obj2))) { + return obj1 !== 0 || isNegZero(obj1) === isNegZero(obj2); + } + + return false; +} + +module.exports = identical; + +},{"./is-nan":57,"./is-neg-zero":58}],54:[function(require,module,exports){ +"use strict"; + +var getClass = require("./get-class"); + +/** + * @name samsam.isArguments + * @param Object object + * + * Returns ``true`` if ``object`` is an ``arguments`` object, + * ``false`` otherwise. + */ +function isArguments(object) { + if (getClass(object) === "Arguments") { + return true; + } + if ( + typeof object !== "object" || + typeof object.length !== "number" || + getClass(object) === "Array" + ) { + return false; + } + if (typeof object.callee === "function") { + return true; + } + try { + object[object.length] = 6; + delete object[object.length]; + } catch (e) { + return true; + } + return false; +} + +module.exports = isArguments; + +},{"./get-class":52}],55:[function(require,module,exports){ +"use strict"; + +function isDate(value) { + return value instanceof Date; +} + +module.exports = isDate; + +},{}],56:[function(require,module,exports){ +"use strict"; + +var div = typeof document !== "undefined" && document.createElement("div"); + +/** + * @name samsam.isElement + * @param Object object + * + * Returns ``true`` if ``object`` is a DOM element node. Unlike + * Underscore.js/lodash, this function will return ``false`` if ``object`` + * is an *element-like* object, i.e. a regular object with a ``nodeType`` + * property that holds the value ``1``. + */ +function isElement(object) { + if (!object || object.nodeType !== 1 || !div) { + return false; + } + try { + object.appendChild(div); + object.removeChild(div); + } catch (e) { + return false; + } + return true; +} + +module.exports = isElement; + +},{}],57:[function(require,module,exports){ +"use strict"; + +function isNaN(value) { + // Unlike global isNaN, this avoids type coercion + // typeof check avoids IE host object issues, hat tip to + // lodash + var val = value; // JsLint thinks value !== value is "weird" + return typeof value === "number" && value !== val; +} + +module.exports = isNaN; + +},{}],58:[function(require,module,exports){ +"use strict"; + +/** + * @name samsam.isNegZero + * @param Object value + * + * Returns ``true`` if ``value`` is ``-0``. + */ +function isNegZero(value) { + return value === 0 && 1 / value === -Infinity; +} + +module.exports = isNegZero; + +},{}],59:[function(require,module,exports){ +"use strict"; + +// Returns true when the value is a regular Object and not a specialized Object +// +// This helps speeding up deepEqual cyclic checks +// The premise is that only Objects are stored in the visited array. +// So if this function returns false, we don't have to do the +// expensive operation of searching for the value in the the array of already +// visited objects +function isObject(value) { + return ( + typeof value === "object" && + value !== null && + // none of these are collection objects, so we can return false + !(value instanceof Boolean) && + !(value instanceof Date) && + !(value instanceof Error) && + !(value instanceof Number) && + !(value instanceof RegExp) && + !(value instanceof String) + ); +} + +module.exports = isObject; + +},{}],60:[function(require,module,exports){ +"use strict"; + +function isSet(val) { + return (typeof Set !== "undefined" && val instanceof Set) || false; +} + +module.exports = isSet; + +},{}],61:[function(require,module,exports){ +"use strict"; + +function isSubset(s1, s2, compare) { + var allContained = true; + s1.forEach(function(v1) { + var includes = false; + s2.forEach(function(v2) { + if (compare(v2, v1)) { + includes = true; + } + }); + allContained = allContained && includes; + }); + + return allContained; +} + +module.exports = isSubset; + +},{}],62:[function(require,module,exports){ +"use strict"; + +var slice = require("@sinonjs/commons").prototypes.string.slice; +var typeOf = require("@sinonjs/commons").typeOf; +var valueToString = require("@sinonjs/commons").valueToString; + +module.exports = function iterableToString(obj) { + var representation = ""; + + function stringify(item) { + return typeof item === "string" + ? "'" + item + "'" + : valueToString(item); + } + + function mapToString(map) { + /* eslint-disable-next-line local-rules/no-prototype-methods */ + map.forEach(function(value, key) { + representation += + "[" + stringify(key) + "," + stringify(value) + "],"; + }); + + representation = slice(representation, 0, -1); + return representation; + } + + function genericIterableToString(iterable) { + /* eslint-disable-next-line local-rules/no-prototype-methods */ + iterable.forEach(function(value) { + representation += stringify(value) + ","; + }); + + representation = slice(representation, 0, -1); + return representation; + } + + if (typeOf(obj) === "map") { + return mapToString(obj); + } + + return genericIterableToString(obj); +}; + +},{"@sinonjs/commons":39}],63:[function(require,module,exports){ +"use strict"; + +var valueToString = require("@sinonjs/commons").valueToString; + +var deepEqual = require("./deep-equal").use(match); // eslint-disable-line no-use-before-define +var getClass = require("./get-class"); +var isDate = require("./is-date"); +var isSet = require("./is-set"); +var isSubset = require("./is-subset"); +var createMatcher = require("./matcher"); + +function arrayContains(array, subset, compare) { + if (subset.length === 0) { + return true; + } + var i, l, j, k; + for (i = 0, l = array.length; i < l; ++i) { + if (compare(array[i], subset[0])) { + for (j = 0, k = subset.length; j < k; ++j) { + if (i + j >= l) { + return false; + } + if (!compare(array[i + j], subset[j])) { + return false; + } + } + return true; + } + } + return false; +} + +/** + * @name samsam.match + * @param Object object + * @param Object matcher + * + * Compare arbitrary value ``object`` with matcher. + */ +function match(object, matcher) { + if (matcher && typeof matcher.test === "function") { + return matcher.test(object); + } + + if (typeof matcher === "function") { + return matcher(object) === true; + } + + if (typeof matcher === "string") { + matcher = matcher.toLowerCase(); + var notNull = typeof object === "string" || !!object; + return ( + notNull && + valueToString(object) + .toLowerCase() + .indexOf(matcher) >= 0 + ); + } + + if (typeof matcher === "number") { + return matcher === object; + } + + if (typeof matcher === "boolean") { + return matcher === object; + } + + if (typeof matcher === "undefined") { + return typeof object === "undefined"; + } + + if (matcher === null) { + return object === null; + } + + if (object === null) { + return false; + } + + if (isSet(object)) { + return isSubset(matcher, object, match); + } + + if (getClass(object) === "Array" && getClass(matcher) === "Array") { + return arrayContains(object, matcher, match); + } + + if (isDate(matcher)) { + return isDate(object) && object.getTime() === matcher.getTime(); + } + + if (matcher && typeof matcher === "object") { + if (matcher === object) { + return true; + } + if (typeof object !== "object") { + return false; + } + var prop; + // eslint-disable-next-line guard-for-in + for (prop in matcher) { + var value = object[prop]; + if ( + typeof value === "undefined" && + typeof object.getAttribute === "function" + ) { + value = object.getAttribute(prop); + } + if ( + matcher[prop] === null || + typeof matcher[prop] === "undefined" + ) { + if (value !== matcher[prop]) { + return false; + } + } else if ( + typeof value === "undefined" || + !deepEqual(value, matcher[prop]) + ) { + return false; + } + } + return true; + } + + throw new Error( + "Matcher was not a string, a number, a " + + "function, a boolean or an object" + ); +} + +Object.keys(createMatcher).forEach(function(key) { + match[key] = createMatcher[key]; +}); + +module.exports = match; + +},{"./deep-equal":50,"./get-class":52,"./is-date":55,"./is-set":60,"./is-subset":61,"./matcher":64,"@sinonjs/commons":39}],64:[function(require,module,exports){ +"use strict"; + +var arrayProto = require("@sinonjs/commons").prototypes.array; +var deepEqual = require("./deep-equal").use(match); // eslint-disable-line no-use-before-define +var every = require("@sinonjs/commons").every; +var functionName = require("@sinonjs/commons").functionName; +var get = require("lodash").get; +var iterableToString = require("./iterable-to-string"); +var objectProto = require("@sinonjs/commons").prototypes.object; +var stringProto = require("@sinonjs/commons").prototypes.string; +var typeOf = require("@sinonjs/commons").typeOf; +var valueToString = require("@sinonjs/commons").valueToString; + +var arrayIndexOf = arrayProto.indexOf; +var arrayEvery = arrayProto.every; +var join = arrayProto.join; +var map = arrayProto.map; +var some = arrayProto.some; + +var hasOwnProperty = objectProto.hasOwnProperty; +var isPrototypeOf = objectProto.isPrototypeOf; + +var stringIndexOf = stringProto.indexOf; + +function assertType(value, type, name) { + var actual = typeOf(value); + if (actual !== type) { + throw new TypeError( + "Expected type of " + + name + + " to be " + + type + + ", but was " + + actual + ); + } +} + +function assertMethodExists(value, method, name, methodPath) { + if (value[method] == null) { + throw new TypeError( + "Expected " + name + " to have method " + methodPath + ); + } +} + +var matcher = { + toString: function() { + return this.message; + } +}; + +function isMatcher(object) { + return isPrototypeOf(matcher, object); +} + +function matchObject(actual, expectation) { + if (actual === null || actual === undefined) { + return false; + } + + return arrayEvery(Object.keys(expectation), function(key) { + var exp = expectation[key]; + var act = actual[key]; + + if (isMatcher(exp)) { + if (!exp.test(act)) { + return false; + } + } else if (typeOf(exp) === "object") { + if (!matchObject(act, exp)) { + return false; + } + } else if (!deepEqual(act, exp)) { + return false; + } + + return true; + }); +} + +var TYPE_MAP = { + function: function(m, expectation, message) { + m.test = expectation; + m.message = message || "match(" + functionName(expectation) + ")"; + }, + number: function(m, expectation) { + m.test = function(actual) { + // we need type coercion here + return expectation == actual; // eslint-disable-line eqeqeq + }; + }, + object: function(m, expectation) { + var array = []; + + if (typeof expectation.test === "function") { + m.test = function(actual) { + return expectation.test(actual) === true; + }; + m.message = "match(" + functionName(expectation.test) + ")"; + return m; + } + + array = map(Object.keys(expectation), function(key) { + return key + ": " + valueToString(expectation[key]); + }); + + m.test = function(actual) { + return matchObject(actual, expectation); + }; + m.message = "match(" + join(array, ", ") + ")"; + + return m; + }, + regexp: function(m, expectation) { + m.test = function(actual) { + return typeof actual === "string" && expectation.test(actual); + }; + }, + string: function(m, expectation) { + m.test = function(actual) { + return ( + typeof actual === "string" && + stringIndexOf(actual, expectation) !== -1 + ); + }; + m.message = 'match("' + expectation + '")'; + } +}; + +function match(expectation, message) { + var m = Object.create(matcher); + var type = typeOf(expectation); + + if (message !== undefined && typeof message !== "string") { + throw new TypeError("Message should be a string"); + } + + if (arguments.length > 2) { + throw new TypeError( + "Expected 1 or 2 arguments, received " + arguments.length + ); + } + + if (type in TYPE_MAP) { + TYPE_MAP[type](m, expectation, message); + } else { + m.test = function(actual) { + return deepEqual(actual, expectation); + }; + } + + if (!m.message) { + m.message = "match(" + valueToString(expectation) + ")"; + } + + return m; +} + +matcher.or = function(m2) { + if (!arguments.length) { + throw new TypeError("Matcher expected"); + } else if (!isMatcher(m2)) { + m2 = match(m2); + } + var m1 = this; + var or = Object.create(matcher); + or.test = function(actual) { + return m1.test(actual) || m2.test(actual); + }; + or.message = m1.message + ".or(" + m2.message + ")"; + return or; +}; + +matcher.and = function(m2) { + if (!arguments.length) { + throw new TypeError("Matcher expected"); + } else if (!isMatcher(m2)) { + m2 = match(m2); + } + var m1 = this; + var and = Object.create(matcher); + and.test = function(actual) { + return m1.test(actual) && m2.test(actual); + }; + and.message = m1.message + ".and(" + m2.message + ")"; + return and; +}; + +match.isMatcher = isMatcher; + +match.any = match(function() { + return true; +}, "any"); + +match.defined = match(function(actual) { + return actual !== null && actual !== undefined; +}, "defined"); + +match.truthy = match(function(actual) { + return !!actual; +}, "truthy"); + +match.falsy = match(function(actual) { + return !actual; +}, "falsy"); + +match.same = function(expectation) { + return match(function(actual) { + return expectation === actual; + }, "same(" + valueToString(expectation) + ")"); +}; + +match.in = function(arrayOfExpectations) { + if (typeOf(arrayOfExpectations) !== "array") { + throw new TypeError("array expected"); + } + + return match(function(actual) { + return some(arrayOfExpectations, function(expectation) { + return expectation === actual; + }); + }, "in(" + valueToString(arrayOfExpectations) + ")"); +}; + +match.typeOf = function(type) { + assertType(type, "string", "type"); + return match(function(actual) { + return typeOf(actual) === type; + }, 'typeOf("' + type + '")'); +}; + +match.instanceOf = function(type) { + if ( + typeof Symbol === "undefined" || + typeof Symbol.hasInstance === "undefined" + ) { + assertType(type, "function", "type"); + } else { + assertMethodExists( + type, + Symbol.hasInstance, + "type", + "[Symbol.hasInstance]" + ); + } + return match(function(actual) { + return actual instanceof type; + }, "instanceOf(" + + (functionName(type) || Object.prototype.toString.call(type)) + + ")"); +}; + +function createPropertyMatcher(propertyTest, messagePrefix) { + return function(property, value) { + assertType(property, "string", "property"); + var onlyProperty = arguments.length === 1; + var message = messagePrefix + '("' + property + '"'; + if (!onlyProperty) { + message += ", " + valueToString(value); + } + message += ")"; + return match(function(actual) { + if ( + actual === undefined || + actual === null || + !propertyTest(actual, property) + ) { + return false; + } + return onlyProperty || deepEqual(actual[property], value); + }, message); + }; +} + +match.has = createPropertyMatcher(function(actual, property) { + if (typeof actual === "object") { + return property in actual; + } + return actual[property] !== undefined; +}, "has"); + +match.hasOwn = createPropertyMatcher(function(actual, property) { + return hasOwnProperty(actual, property); +}, "hasOwn"); + +match.hasNested = function(property, value) { + assertType(property, "string", "property"); + var onlyProperty = arguments.length === 1; + var message = 'hasNested("' + property + '"'; + if (!onlyProperty) { + message += ", " + valueToString(value); + } + message += ")"; + return match(function(actual) { + if ( + actual === undefined || + actual === null || + get(actual, property) === undefined + ) { + return false; + } + return onlyProperty || deepEqual(get(actual, property), value); + }, message); +}; + +match.every = function(predicate) { + if (!isMatcher(predicate)) { + throw new TypeError("Matcher expected"); + } + + return match(function(actual) { + if (typeOf(actual) === "object") { + return every(Object.keys(actual), function(key) { + return predicate.test(actual[key]); + }); + } + + return ( + !!actual && + typeOf(actual.forEach) === "function" && + every(actual, function(element) { + return predicate.test(element); + }) + ); + }, "every(" + predicate.message + ")"); +}; + +match.some = function(predicate) { + if (!isMatcher(predicate)) { + throw new TypeError("Matcher expected"); + } + + return match(function(actual) { + if (typeOf(actual) === "object") { + return !every(Object.keys(actual), function(key) { + return !predicate.test(actual[key]); + }); + } + + return ( + !!actual && + typeOf(actual.forEach) === "function" && + !every(actual, function(element) { + return !predicate.test(element); + }) + ); + }, "some(" + predicate.message + ")"); +}; + +match.array = match.typeOf("array"); + +match.array.deepEquals = function(expectation) { + return match(function(actual) { + // Comparing lengths is the fastest way to spot a difference before iterating through every item + var sameLength = actual.length === expectation.length; + return ( + typeOf(actual) === "array" && + sameLength && + every(actual, function(element, index) { + var expected = expectation[index]; + return typeOf(expected) === "array" && + typeOf(element) === "array" + ? match.array.deepEquals(expected).test(element) + : deepEqual(expected, element); + }) + ); + }, "deepEquals([" + iterableToString(expectation) + "])"); +}; + +match.array.startsWith = function(expectation) { + return match(function(actual) { + return ( + typeOf(actual) === "array" && + every(expectation, function(expectedElement, index) { + return actual[index] === expectedElement; + }) + ); + }, "startsWith([" + iterableToString(expectation) + "])"); +}; + +match.array.endsWith = function(expectation) { + return match(function(actual) { + // This indicates the index in which we should start matching + var offset = actual.length - expectation.length; + + return ( + typeOf(actual) === "array" && + every(expectation, function(expectedElement, index) { + return actual[offset + index] === expectedElement; + }) + ); + }, "endsWith([" + iterableToString(expectation) + "])"); +}; + +match.array.contains = function(expectation) { + return match(function(actual) { + return ( + typeOf(actual) === "array" && + every(expectation, function(expectedElement) { + return arrayIndexOf(actual, expectedElement) !== -1; + }) + ); + }, "contains([" + iterableToString(expectation) + "])"); +}; + +match.map = match.typeOf("map"); + +match.map.deepEquals = function mapDeepEquals(expectation) { + return match(function(actual) { + // Comparing lengths is the fastest way to spot a difference before iterating through every item + var sameLength = actual.size === expectation.size; + return ( + typeOf(actual) === "map" && + sameLength && + every(actual, function(element, key) { + return expectation.has(key) && expectation.get(key) === element; + }) + ); + }, "deepEquals(Map[" + iterableToString(expectation) + "])"); +}; + +match.map.contains = function mapContains(expectation) { + return match(function(actual) { + return ( + typeOf(actual) === "map" && + every(expectation, function(element, key) { + return actual.has(key) && actual.get(key) === element; + }) + ); + }, "contains(Map[" + iterableToString(expectation) + "])"); +}; + +match.set = match.typeOf("set"); + +match.set.deepEquals = function setDeepEquals(expectation) { + return match(function(actual) { + // Comparing lengths is the fastest way to spot a difference before iterating through every item + var sameLength = actual.size === expectation.size; + return ( + typeOf(actual) === "set" && + sameLength && + every(actual, function(element) { + return expectation.has(element); + }) + ); + }, "deepEquals(Set[" + iterableToString(expectation) + "])"); +}; + +match.set.contains = function setContains(expectation) { + return match(function(actual) { + return ( + typeOf(actual) === "set" && + every(expectation, function(element) { + return actual.has(element); + }) + ); + }, "contains(Set[" + iterableToString(expectation) + "])"); +}; + +match.bool = match.typeOf("boolean"); +match.number = match.typeOf("number"); +match.string = match.typeOf("string"); +match.object = match.typeOf("object"); +match.func = match.typeOf("function"); +match.regexp = match.typeOf("regexp"); +match.date = match.typeOf("date"); +match.symbol = match.typeOf("symbol"); + +module.exports = match; + +},{"./deep-equal":50,"./iterable-to-string":62,"@sinonjs/commons":39,"lodash":72}],65:[function(require,module,exports){ +"use strict"; + +var identical = require("./identical"); +var isArguments = require("./is-arguments"); +var isElement = require("./is-element"); +var isNegZero = require("./is-neg-zero"); +var isSet = require("./is-set"); +var match = require("./match"); +var deepEqualCyclic = require("./deep-equal").use(match); +var createMatcher = require("./matcher"); + +module.exports = { + createMatcher: createMatcher, + deepEqual: deepEqualCyclic, + identical: identical, + isArguments: isArguments, + isElement: isElement, + isNegZero: isNegZero, + isSet: isSet, + match: match +}; + +},{"./deep-equal":50,"./identical":53,"./is-arguments":54,"./is-element":56,"./is-neg-zero":58,"./is-set":60,"./match":63,"./matcher":64}],66:[function(require,module,exports){ +// This is free and unencumbered software released into the public domain. +// See LICENSE.md for more information. + +var encoding = require("./lib/encoding.js"); + +module.exports = { + TextEncoder: encoding.TextEncoder, + TextDecoder: encoding.TextDecoder, +}; + +},{"./lib/encoding.js":68}],67:[function(require,module,exports){ +(function(global) { + 'use strict'; + + if (typeof module !== "undefined" && module.exports) { + module.exports = global; + } + + global["encoding-indexes"] = +{ + 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"x-mac-cyrillic":[1040,1041,1042,1043,1044,1045,1046,1047,1048,1049,1050,1051,1052,1053,1054,1055,1056,1057,1058,1059,1060,1061,1062,1063,1064,1065,1066,1067,1068,1069,1070,1071,8224,176,1168,163,167,8226,182,1030,174,169,8482,1026,1106,8800,1027,1107,8734,177,8804,8805,1110,181,1169,1032,1028,1108,1031,1111,1033,1113,1034,1114,1112,1029,172,8730,402,8776,8710,171,187,8230,160,1035,1115,1036,1116,1109,8211,8212,8220,8221,8216,8217,247,8222,1038,1118,1039,1119,8470,1025,1105,1103,1072,1073,1074,1075,1076,1077,1078,1079,1080,1081,1082,1083,1084,1085,1086,1087,1088,1089,1090,1091,1092,1093,1094,1095,1096,1097,1098,1099,1100,1101,1102,8364] +}; + +// For strict environments where `this` inside the global scope +// is `undefined`, take a pure object instead +}(this || {})); +},{}],68:[function(require,module,exports){ +// This is free and unencumbered software released into the public domain. +// See LICENSE.md for more information. + +/** + * @fileoverview Global |this| required for resolving indexes in node. + * @suppress {globalThis} + */ +(function(global) { + 'use strict'; + + // If we're in node require encoding-indexes and attach it to the global. + if (typeof module !== "undefined" && module.exports && + !global["encoding-indexes"]) { + global["encoding-indexes"] = + require("./encoding-indexes.js")["encoding-indexes"]; + } + + // + // Utilities + // + + /** + * @param {number} a The number to test. + * @param {number} min The minimum value in the range, inclusive. + * @param {number} max The maximum value in the range, inclusive. + * @return {boolean} True if a >= min and a <= max. + */ + function inRange(a, min, max) { + return min <= a && a <= max; + } + + /** + * @param {!Array.<*>} array The array to check. + * @param {*} item The item to look for in the array. + * @return {boolean} True if the item appears in the array. + */ + function includes(array, item) { + return array.indexOf(item) !== -1; + } + + var floor = Math.floor; + + /** + * @param {*} o + * @return {Object} + */ + function ToDictionary(o) { + if (o === undefined) return {}; + if (o === Object(o)) return o; + throw TypeError('Could not convert argument to dictionary'); + } + + /** + * @param {string} string Input string of UTF-16 code units. + * @return {!Array.} Code points. + */ + function stringToCodePoints(string) { + // https://heycam.github.io/webidl/#dfn-obtain-unicode + + // 1. Let S be the DOMString value. + var s = String(string); + + // 2. Let n be the length of S. + var n = s.length; + + // 3. Initialize i to 0. + var i = 0; + + // 4. Initialize U to be an empty sequence of Unicode characters. + var u = []; + + // 5. While i < n: + while (i < n) { + + // 1. Let c be the code unit in S at index i. + var c = s.charCodeAt(i); + + // 2. Depending on the value of c: + + // c < 0xD800 or c > 0xDFFF + if (c < 0xD800 || c > 0xDFFF) { + // Append to U the Unicode character with code point c. + u.push(c); + } + + // 0xDC00 ≤ c ≤ 0xDFFF + else if (0xDC00 <= c && c <= 0xDFFF) { + // Append to U a U+FFFD REPLACEMENT CHARACTER. + u.push(0xFFFD); + } + + // 0xD800 ≤ c ≤ 0xDBFF + else if (0xD800 <= c && c <= 0xDBFF) { + // 1. If i = n−1, then append to U a U+FFFD REPLACEMENT + // CHARACTER. + if (i === n - 1) { + u.push(0xFFFD); + } + // 2. Otherwise, i < n−1: + else { + // 1. Let d be the code unit in S at index i+1. + var d = s.charCodeAt(i + 1); + + // 2. If 0xDC00 ≤ d ≤ 0xDFFF, then: + if (0xDC00 <= d && d <= 0xDFFF) { + // 1. Let a be c & 0x3FF. + var a = c & 0x3FF; + + // 2. Let b be d & 0x3FF. + var b = d & 0x3FF; + + // 3. Append to U the Unicode character with code point + // 2^16+2^10*a+b. + u.push(0x10000 + (a << 10) + b); + + // 4. Set i to i+1. + i += 1; + } + + // 3. Otherwise, d < 0xDC00 or d > 0xDFFF. Append to U a + // U+FFFD REPLACEMENT CHARACTER. + else { + u.push(0xFFFD); + } + } + } + + // 3. Set i to i+1. + i += 1; + } + + // 6. Return U. + return u; + } + + /** + * @param {!Array.} code_points Array of code points. + * @return {string} string String of UTF-16 code units. + */ + function codePointsToString(code_points) { + var s = ''; + for (var i = 0; i < code_points.length; ++i) { + var cp = code_points[i]; + if (cp <= 0xFFFF) { + s += String.fromCharCode(cp); + } else { + cp -= 0x10000; + s += String.fromCharCode((cp >> 10) + 0xD800, + (cp & 0x3FF) + 0xDC00); + } + } + return s; + } + + + // + // Implementation of Encoding specification + // https://encoding.spec.whatwg.org/ + // + + // + // 4. Terminology + // + + /** + * An ASCII byte is a byte in the range 0x00 to 0x7F, inclusive. + * @param {number} a The number to test. + * @return {boolean} True if a is in the range 0x00 to 0x7F, inclusive. + */ + function isASCIIByte(a) { + return 0x00 <= a && a <= 0x7F; + } + + /** + * An ASCII code point is a code point in the range U+0000 to + * U+007F, inclusive. + */ + var isASCIICodePoint = isASCIIByte; + + + /** + * End-of-stream is a special token that signifies no more tokens + * are in the stream. + * @const + */ var end_of_stream = -1; + + /** + * A stream represents an ordered sequence of tokens. + * + * @constructor + * @param {!(Array.|Uint8Array)} tokens Array of tokens that provide + * the stream. + */ + function Stream(tokens) { + /** @type {!Array.} */ + this.tokens = [].slice.call(tokens); + // Reversed as push/pop is more efficient than shift/unshift. + this.tokens.reverse(); + } + + Stream.prototype = { + /** + * @return {boolean} True if end-of-stream has been hit. + */ + endOfStream: function() { + return !this.tokens.length; + }, + + /** + * When a token is read from a stream, the first token in the + * stream must be returned and subsequently removed, and + * end-of-stream must be returned otherwise. + * + * @return {number} Get the next token from the stream, or + * end_of_stream. + */ + read: function() { + if (!this.tokens.length) + return end_of_stream; + return this.tokens.pop(); + }, + + /** + * When one or more tokens are prepended to a stream, those tokens + * must be inserted, in given order, before the first token in the + * stream. + * + * @param {(number|!Array.)} token The token(s) to prepend to the + * stream. + */ + prepend: function(token) { + if (Array.isArray(token)) { + var tokens = /**@type {!Array.}*/(token); + while (tokens.length) + this.tokens.push(tokens.pop()); + } else { + this.tokens.push(token); + } + }, + + /** + * When one or more tokens are pushed to a stream, those tokens + * must be inserted, in given order, after the last token in the + * stream. + * + * @param {(number|!Array.)} token The tokens(s) to push to the + * stream. + */ + push: function(token) { + if (Array.isArray(token)) { + var tokens = /**@type {!Array.}*/(token); + while (tokens.length) + this.tokens.unshift(tokens.shift()); + } else { + this.tokens.unshift(token); + } + } + }; + + // + // 5. Encodings + // + + // 5.1 Encoders and decoders + + /** @const */ + var finished = -1; + + /** + * @param {boolean} fatal If true, decoding errors raise an exception. + * @param {number=} opt_code_point Override the standard fallback code point. + * @return {number} The code point to insert on a decoding error. + */ + function decoderError(fatal, opt_code_point) { + if (fatal) + throw TypeError('Decoder error'); + return opt_code_point || 0xFFFD; + } + + /** + * @param {number} code_point The code point that could not be encoded. + * @return {number} Always throws, no value is actually returned. + */ + function encoderError(code_point) { + throw TypeError('The code point ' + code_point + ' could not be encoded.'); + } + + /** @interface */ + function Decoder() {} + Decoder.prototype = { + /** + * @param {Stream} stream The stream of bytes being decoded. + * @param {number} bite The next byte read from the stream. + * @return {?(number|!Array.)} The next code point(s) + * decoded, or null if not enough data exists in the input + * stream to decode a complete code point, or |finished|. + */ + handler: function(stream, bite) {} + }; + + /** @interface */ + function Encoder() {} + Encoder.prototype = { + /** + * @param {Stream} stream The stream of code points being encoded. + * @param {number} code_point Next code point read from the stream. + * @return {(number|!Array.)} Byte(s) to emit, or |finished|. + */ + handler: function(stream, code_point) {} + }; + + // 5.2 Names and labels + + // TODO: Define @typedef for Encoding: {name:string,labels:Array.} + // https://github.com/google/closure-compiler/issues/247 + + /** + * @param {string} label The encoding label. + * @return {?{name:string,labels:Array.}} + */ + function getEncoding(label) { + // 1. Remove any leading and trailing ASCII whitespace from label. + label = String(label).trim().toLowerCase(); + + // 2. If label is an ASCII case-insensitive match for any of the + // labels listed in the table below, return the corresponding + // encoding, and failure otherwise. + if (Object.prototype.hasOwnProperty.call(label_to_encoding, label)) { + return label_to_encoding[label]; + } + return null; + } + + /** + * Encodings table: https://encoding.spec.whatwg.org/encodings.json + * @const + * @type {!Array.<{ + * heading: string, + * encodings: Array.<{name:string,labels:Array.}> + * }>} + */ + var encodings = [ + { + "encodings": [ + { + "labels": [ + "unicode-1-1-utf-8", + "utf-8", + "utf8" + ], + "name": "UTF-8" + } + ], + "heading": "The Encoding" + }, + { + "encodings": [ + { + "labels": [ + "866", + "cp866", + "csibm866", + "ibm866" + ], + "name": "IBM866" + }, + { + "labels": [ + "csisolatin2", + "iso-8859-2", + "iso-ir-101", + "iso8859-2", + "iso88592", + "iso_8859-2", + "iso_8859-2:1987", + "l2", + "latin2" + ], + "name": "ISO-8859-2" + }, + { + "labels": [ + "csisolatin3", + "iso-8859-3", + "iso-ir-109", + "iso8859-3", + "iso88593", + "iso_8859-3", + "iso_8859-3:1988", + "l3", + "latin3" + ], + "name": "ISO-8859-3" + }, + { + "labels": [ + "csisolatin4", + "iso-8859-4", + "iso-ir-110", + "iso8859-4", + "iso88594", + "iso_8859-4", + "iso_8859-4:1988", + "l4", + "latin4" + ], + "name": "ISO-8859-4" + }, + { + "labels": [ + "csisolatincyrillic", + "cyrillic", + "iso-8859-5", + "iso-ir-144", + "iso8859-5", + "iso88595", + "iso_8859-5", + "iso_8859-5:1988" + ], + "name": "ISO-8859-5" + }, + { + "labels": [ + "arabic", + "asmo-708", + "csiso88596e", + "csiso88596i", + "csisolatinarabic", + "ecma-114", + "iso-8859-6", + "iso-8859-6-e", + "iso-8859-6-i", + "iso-ir-127", + "iso8859-6", + "iso88596", + "iso_8859-6", + "iso_8859-6:1987" + ], + "name": "ISO-8859-6" + }, + { + "labels": [ + "csisolatingreek", + "ecma-118", + "elot_928", + "greek", + "greek8", + "iso-8859-7", + "iso-ir-126", + "iso8859-7", + "iso88597", + "iso_8859-7", + "iso_8859-7:1987", + "sun_eu_greek" + ], + "name": "ISO-8859-7" + }, + { + "labels": [ + "csiso88598e", + "csisolatinhebrew", + "hebrew", + "iso-8859-8", + "iso-8859-8-e", + "iso-ir-138", + "iso8859-8", + "iso88598", + "iso_8859-8", + "iso_8859-8:1988", + "visual" + ], + "name": "ISO-8859-8" + }, + { + "labels": [ + "csiso88598i", + "iso-8859-8-i", + "logical" + ], + "name": "ISO-8859-8-I" + }, + { + "labels": [ + "csisolatin6", + "iso-8859-10", + "iso-ir-157", + "iso8859-10", + "iso885910", + "l6", + "latin6" + ], + "name": "ISO-8859-10" + }, + { + "labels": [ + "iso-8859-13", + "iso8859-13", + "iso885913" + ], + "name": "ISO-8859-13" + }, + { + "labels": [ + "iso-8859-14", + "iso8859-14", + "iso885914" + ], + "name": "ISO-8859-14" + }, + { + "labels": [ + "csisolatin9", + "iso-8859-15", + "iso8859-15", + "iso885915", + "iso_8859-15", + "l9" + ], + "name": "ISO-8859-15" + }, + { + "labels": [ + "iso-8859-16" + ], + "name": "ISO-8859-16" + }, + { + "labels": [ + "cskoi8r", + "koi", + "koi8", + "koi8-r", + "koi8_r" + ], + "name": "KOI8-R" + }, + { + "labels": [ + "koi8-ru", + "koi8-u" + ], + "name": "KOI8-U" + }, + { + "labels": [ + "csmacintosh", + "mac", + "macintosh", + "x-mac-roman" + ], + "name": "macintosh" + }, + { + "labels": [ + "dos-874", + "iso-8859-11", + "iso8859-11", + "iso885911", + "tis-620", + "windows-874" + ], + "name": "windows-874" + }, + { + "labels": [ + "cp1250", + "windows-1250", + "x-cp1250" + ], + "name": "windows-1250" + }, + { + "labels": [ + "cp1251", + "windows-1251", + "x-cp1251" + ], + "name": "windows-1251" + }, + { + "labels": [ + "ansi_x3.4-1968", + "ascii", + "cp1252", + "cp819", + "csisolatin1", + "ibm819", + "iso-8859-1", + "iso-ir-100", + "iso8859-1", + "iso88591", + "iso_8859-1", + "iso_8859-1:1987", + "l1", + "latin1", + "us-ascii", + "windows-1252", + "x-cp1252" + ], + "name": "windows-1252" + }, + { + "labels": [ + "cp1253", + "windows-1253", + "x-cp1253" + ], + "name": "windows-1253" + }, + { + "labels": [ + "cp1254", + "csisolatin5", + "iso-8859-9", + "iso-ir-148", + "iso8859-9", + "iso88599", + "iso_8859-9", + "iso_8859-9:1989", + "l5", + "latin5", + "windows-1254", + "x-cp1254" + ], + "name": "windows-1254" + }, + { + "labels": [ + "cp1255", + "windows-1255", + "x-cp1255" + ], + "name": "windows-1255" + }, + { + "labels": [ + "cp1256", + "windows-1256", + "x-cp1256" + ], + "name": "windows-1256" + }, + { + "labels": [ + "cp1257", + "windows-1257", + "x-cp1257" + ], + "name": "windows-1257" + }, + { + "labels": [ + "cp1258", + "windows-1258", + "x-cp1258" + ], + "name": "windows-1258" + }, + { + "labels": [ + "x-mac-cyrillic", + "x-mac-ukrainian" + ], + "name": "x-mac-cyrillic" + } + ], + "heading": "Legacy single-byte encodings" + }, + { + "encodings": [ + { + "labels": [ + "chinese", + "csgb2312", + "csiso58gb231280", + "gb2312", + "gb_2312", + "gb_2312-80", + "gbk", + "iso-ir-58", + "x-gbk" + ], + "name": "GBK" + }, + { + "labels": [ + "gb18030" + ], + "name": "gb18030" + } + ], + "heading": "Legacy multi-byte Chinese (simplified) encodings" + }, + { + "encodings": [ + { + "labels": [ + "big5", + "big5-hkscs", + "cn-big5", + "csbig5", + "x-x-big5" + ], + "name": "Big5" + } + ], + "heading": "Legacy multi-byte Chinese (traditional) encodings" + }, + { + "encodings": [ + { + "labels": [ + "cseucpkdfmtjapanese", + "euc-jp", + "x-euc-jp" + ], + "name": "EUC-JP" + }, + { + "labels": [ + "csiso2022jp", + "iso-2022-jp" + ], + "name": "ISO-2022-JP" + }, + { + "labels": [ + "csshiftjis", + "ms932", + "ms_kanji", + "shift-jis", + "shift_jis", + "sjis", + "windows-31j", + "x-sjis" + ], + "name": "Shift_JIS" + } + ], + "heading": "Legacy multi-byte Japanese encodings" + }, + { + "encodings": [ + { + "labels": [ + "cseuckr", + "csksc56011987", + "euc-kr", + "iso-ir-149", + "korean", + "ks_c_5601-1987", + "ks_c_5601-1989", + "ksc5601", + "ksc_5601", + "windows-949" + ], + "name": "EUC-KR" + } + ], + "heading": "Legacy multi-byte Korean encodings" + }, + { + "encodings": [ + { + "labels": [ + "csiso2022kr", + "hz-gb-2312", + "iso-2022-cn", + "iso-2022-cn-ext", + "iso-2022-kr" + ], + "name": "replacement" + }, + { + "labels": [ + "utf-16be" + ], + "name": "UTF-16BE" + }, + { + "labels": [ + "utf-16", + "utf-16le" + ], + "name": "UTF-16LE" + }, + { + "labels": [ + "x-user-defined" + ], + "name": "x-user-defined" + } + ], + "heading": "Legacy miscellaneous encodings" + } + ]; + + // Label to encoding registry. + /** @type {Object.}>} */ + var label_to_encoding = {}; + encodings.forEach(function(category) { + category.encodings.forEach(function(encoding) { + encoding.labels.forEach(function(label) { + label_to_encoding[label] = encoding; + }); + }); + }); + + // Registry of of encoder/decoder factories, by encoding name. + /** @type {Object.} */ + var encoders = {}; + /** @type {Object.} */ + var decoders = {}; + + // + // 6. Indexes + // + + /** + * @param {number} pointer The |pointer| to search for. + * @param {(!Array.|undefined)} index The |index| to search within. + * @return {?number} The code point corresponding to |pointer| in |index|, + * or null if |code point| is not in |index|. + */ + function indexCodePointFor(pointer, index) { + if (!index) return null; + return index[pointer] || null; + } + + /** + * @param {number} code_point The |code point| to search for. + * @param {!Array.} index The |index| to search within. + * @return {?number} The first pointer corresponding to |code point| in + * |index|, or null if |code point| is not in |index|. + */ + function indexPointerFor(code_point, index) { + var pointer = index.indexOf(code_point); + return pointer === -1 ? null : pointer; + } + + /** + * @param {string} name Name of the index. + * @return {(!Array.|!Array.>)} + * */ + function index(name) { + if (!('encoding-indexes' in global)) { + throw Error("Indexes missing." + + " Did you forget to include encoding-indexes.js first?"); + } + return global['encoding-indexes'][name]; + } + + /** + * @param {number} pointer The |pointer| to search for in the gb18030 index. + * @return {?number} The code point corresponding to |pointer| in |index|, + * or null if |code point| is not in the gb18030 index. + */ + function indexGB18030RangesCodePointFor(pointer) { + // 1. If pointer is greater than 39419 and less than 189000, or + // pointer is greater than 1237575, return null. + if ((pointer > 39419 && pointer < 189000) || (pointer > 1237575)) + return null; + + // 2. If pointer is 7457, return code point U+E7C7. + if (pointer === 7457) return 0xE7C7; + + // 3. Let offset be the last pointer in index gb18030 ranges that + // is equal to or less than pointer and let code point offset be + // its corresponding code point. + var offset = 0; + var code_point_offset = 0; + var idx = index('gb18030-ranges'); + var i; + for (i = 0; i < idx.length; ++i) { + /** @type {!Array.} */ + var entry = idx[i]; + if (entry[0] <= pointer) { + offset = entry[0]; + code_point_offset = entry[1]; + } else { + break; + } + } + + // 4. Return a code point whose value is code point offset + + // pointer − offset. + return code_point_offset + pointer - offset; + } + + /** + * @param {number} code_point The |code point| to locate in the gb18030 index. + * @return {number} The first pointer corresponding to |code point| in the + * gb18030 index. + */ + function indexGB18030RangesPointerFor(code_point) { + // 1. If code point is U+E7C7, return pointer 7457. + if (code_point === 0xE7C7) return 7457; + + // 2. Let offset be the last code point in index gb18030 ranges + // that is equal to or less than code point and let pointer offset + // be its corresponding pointer. + var offset = 0; + var pointer_offset = 0; + var idx = index('gb18030-ranges'); + var i; + for (i = 0; i < idx.length; ++i) { + /** @type {!Array.} */ + var entry = idx[i]; + if (entry[1] <= code_point) { + offset = entry[1]; + pointer_offset = entry[0]; + } else { + break; + } + } + + // 3. Return a pointer whose value is pointer offset + code point + // − offset. + return pointer_offset + code_point - offset; + } + + /** + * @param {number} code_point The |code_point| to search for in the Shift_JIS + * index. + * @return {?number} The code point corresponding to |pointer| in |index|, + * or null if |code point| is not in the Shift_JIS index. + */ + function indexShiftJISPointerFor(code_point) { + // 1. Let index be index jis0208 excluding all entries whose + // pointer is in the range 8272 to 8835, inclusive. + shift_jis_index = shift_jis_index || + index('jis0208').map(function(code_point, pointer) { + return inRange(pointer, 8272, 8835) ? null : code_point; + }); + var index_ = shift_jis_index; + + // 2. Return the index pointer for code point in index. + return index_.indexOf(code_point); + } + var shift_jis_index; + + /** + * @param {number} code_point The |code_point| to search for in the big5 + * index. + * @return {?number} The code point corresponding to |pointer| in |index|, + * or null if |code point| is not in the big5 index. + */ + function indexBig5PointerFor(code_point) { + // 1. Let index be index Big5 excluding all entries whose pointer + big5_index_no_hkscs = big5_index_no_hkscs || + index('big5').map(function(code_point, pointer) { + return (pointer < (0xA1 - 0x81) * 157) ? null : code_point; + }); + var index_ = big5_index_no_hkscs; + + // 2. If code point is U+2550, U+255E, U+2561, U+256A, U+5341, or + // U+5345, return the last pointer corresponding to code point in + // index. + if (code_point === 0x2550 || code_point === 0x255E || + code_point === 0x2561 || code_point === 0x256A || + code_point === 0x5341 || code_point === 0x5345) { + return index_.lastIndexOf(code_point); + } + + // 3. Return the index pointer for code point in index. + return indexPointerFor(code_point, index_); + } + var big5_index_no_hkscs; + + // + // 8. API + // + + /** @const */ var DEFAULT_ENCODING = 'utf-8'; + + // 8.1 Interface TextDecoder + + /** + * @constructor + * @param {string=} label The label of the encoding; + * defaults to 'utf-8'. + * @param {Object=} options + */ + function TextDecoder(label, options) { + // Web IDL conventions + if (!(this instanceof TextDecoder)) + throw TypeError('Called as a function. Did you forget \'new\'?'); + label = label !== undefined ? String(label) : DEFAULT_ENCODING; + options = ToDictionary(options); + + // A TextDecoder object has an associated encoding, decoder, + // stream, ignore BOM flag (initially unset), BOM seen flag + // (initially unset), error mode (initially replacement), and do + // not flush flag (initially unset). + + /** @private */ + this._encoding = null; + /** @private @type {?Decoder} */ + this._decoder = null; + /** @private @type {boolean} */ + this._ignoreBOM = false; + /** @private @type {boolean} */ + this._BOMseen = false; + /** @private @type {string} */ + this._error_mode = 'replacement'; + /** @private @type {boolean} */ + this._do_not_flush = false; + + + // 1. Let encoding be the result of getting an encoding from + // label. + var encoding = getEncoding(label); + + // 2. If encoding is failure or replacement, throw a RangeError. + if (encoding === null || encoding.name === 'replacement') + throw RangeError('Unknown encoding: ' + label); + if (!decoders[encoding.name]) { + throw Error('Decoder not present.' + + ' Did you forget to include encoding-indexes.js first?'); + } + + // 3. Let dec be a new TextDecoder object. + var dec = this; + + // 4. Set dec's encoding to encoding. + dec._encoding = encoding; + + // 5. If options's fatal member is true, set dec's error mode to + // fatal. + if (Boolean(options['fatal'])) + dec._error_mode = 'fatal'; + + // 6. If options's ignoreBOM member is true, set dec's ignore BOM + // flag. + if (Boolean(options['ignoreBOM'])) + dec._ignoreBOM = true; + + // For pre-ES5 runtimes: + if (!Object.defineProperty) { + this.encoding = dec._encoding.name.toLowerCase(); + this.fatal = dec._error_mode === 'fatal'; + this.ignoreBOM = dec._ignoreBOM; + } + + // 7. Return dec. + return dec; + } + + if (Object.defineProperty) { + // The encoding attribute's getter must return encoding's name. + Object.defineProperty(TextDecoder.prototype, 'encoding', { + /** @this {TextDecoder} */ + get: function() { return this._encoding.name.toLowerCase(); } + }); + + // The fatal attribute's getter must return true if error mode + // is fatal, and false otherwise. + Object.defineProperty(TextDecoder.prototype, 'fatal', { + /** @this {TextDecoder} */ + get: function() { return this._error_mode === 'fatal'; } + }); + + // The ignoreBOM attribute's getter must return true if ignore + // BOM flag is set, and false otherwise. + Object.defineProperty(TextDecoder.prototype, 'ignoreBOM', { + /** @this {TextDecoder} */ + get: function() { return this._ignoreBOM; } + }); + } + + /** + * @param {BufferSource=} input The buffer of bytes to decode. + * @param {Object=} options + * @return {string} The decoded string. + */ + TextDecoder.prototype.decode = function decode(input, options) { + var bytes; + if (typeof input === 'object' && input instanceof ArrayBuffer) { + bytes = new Uint8Array(input); + } else if (typeof input === 'object' && 'buffer' in input && + input.buffer instanceof ArrayBuffer) { + bytes = new Uint8Array(input.buffer, + input.byteOffset, + input.byteLength); + } else { + bytes = new Uint8Array(0); + } + + options = ToDictionary(options); + + // 1. If the do not flush flag is unset, set decoder to a new + // encoding's decoder, set stream to a new stream, and unset the + // BOM seen flag. + if (!this._do_not_flush) { + this._decoder = decoders[this._encoding.name]({ + fatal: this._error_mode === 'fatal'}); + this._BOMseen = false; + } + + // 2. If options's stream is true, set the do not flush flag, and + // unset the do not flush flag otherwise. + this._do_not_flush = Boolean(options['stream']); + + // 3. If input is given, push a copy of input to stream. + // TODO: Align with spec algorithm - maintain stream on instance. + var input_stream = new Stream(bytes); + + // 4. Let output be a new stream. + var output = []; + + /** @type {?(number|!Array.)} */ + var result; + + // 5. While true: + while (true) { + // 1. Let token be the result of reading from stream. + var token = input_stream.read(); + + // 2. If token is end-of-stream and the do not flush flag is + // set, return output, serialized. + // TODO: Align with spec algorithm. + if (token === end_of_stream) + break; + + // 3. Otherwise, run these subsubsteps: + + // 1. Let result be the result of processing token for decoder, + // stream, output, and error mode. + result = this._decoder.handler(input_stream, token); + + // 2. If result is finished, return output, serialized. + if (result === finished) + break; + + if (result !== null) { + if (Array.isArray(result)) + output.push.apply(output, /**@type {!Array.}*/(result)); + else + output.push(result); + } + + // 3. Otherwise, if result is error, throw a TypeError. + // (Thrown in handler) + + // 4. Otherwise, do nothing. + } + // TODO: Align with spec algorithm. + if (!this._do_not_flush) { + do { + result = this._decoder.handler(input_stream, input_stream.read()); + if (result === finished) + break; + if (result === null) + continue; + if (Array.isArray(result)) + output.push.apply(output, /**@type {!Array.}*/(result)); + else + output.push(result); + } while (!input_stream.endOfStream()); + this._decoder = null; + } + + // A TextDecoder object also has an associated serialize stream + // algorithm... + /** + * @param {!Array.} stream + * @return {string} + * @this {TextDecoder} + */ + function serializeStream(stream) { + // 1. Let token be the result of reading from stream. + // (Done in-place on array, rather than as a stream) + + // 2. If encoding is UTF-8, UTF-16BE, or UTF-16LE, and ignore + // BOM flag and BOM seen flag are unset, run these subsubsteps: + if (includes(['UTF-8', 'UTF-16LE', 'UTF-16BE'], this._encoding.name) && + !this._ignoreBOM && !this._BOMseen) { + if (stream.length > 0 && stream[0] === 0xFEFF) { + // 1. If token is U+FEFF, set BOM seen flag. + this._BOMseen = true; + stream.shift(); + } else if (stream.length > 0) { + // 2. Otherwise, if token is not end-of-stream, set BOM seen + // flag and append token to stream. + this._BOMseen = true; + } else { + // 3. Otherwise, if token is not end-of-stream, append token + // to output. + // (no-op) + } + } + // 4. Otherwise, return output. + return codePointsToString(stream); + } + + return serializeStream.call(this, output); + }; + + // 8.2 Interface TextEncoder + + /** + * @constructor + * @param {string=} label The label of the encoding. NONSTANDARD. + * @param {Object=} options NONSTANDARD. + */ + function TextEncoder(label, options) { + // Web IDL conventions + if (!(this instanceof TextEncoder)) + throw TypeError('Called as a function. Did you forget \'new\'?'); + options = ToDictionary(options); + + // A TextEncoder object has an associated encoding and encoder. + + /** @private */ + this._encoding = null; + /** @private @type {?Encoder} */ + this._encoder = null; + + // Non-standard + /** @private @type {boolean} */ + this._do_not_flush = false; + /** @private @type {string} */ + this._fatal = Boolean(options['fatal']) ? 'fatal' : 'replacement'; + + // 1. Let enc be a new TextEncoder object. + var enc = this; + + // 2. Set enc's encoding to UTF-8's encoder. + if (Boolean(options['NONSTANDARD_allowLegacyEncoding'])) { + // NONSTANDARD behavior. + label = label !== undefined ? String(label) : DEFAULT_ENCODING; + var encoding = getEncoding(label); + if (encoding === null || encoding.name === 'replacement') + throw RangeError('Unknown encoding: ' + label); + if (!encoders[encoding.name]) { + throw Error('Encoder not present.' + + ' Did you forget to include encoding-indexes.js first?'); + } + enc._encoding = encoding; + } else { + // Standard behavior. + enc._encoding = getEncoding('utf-8'); + + if (label !== undefined && 'console' in global) { + console.warn('TextEncoder constructor called with encoding label, ' + + 'which is ignored.'); + } + } + + // For pre-ES5 runtimes: + if (!Object.defineProperty) + this.encoding = enc._encoding.name.toLowerCase(); + + // 3. Return enc. + return enc; + } + + if (Object.defineProperty) { + // The encoding attribute's getter must return encoding's name. + Object.defineProperty(TextEncoder.prototype, 'encoding', { + /** @this {TextEncoder} */ + get: function() { return this._encoding.name.toLowerCase(); } + }); + } + + /** + * @param {string=} opt_string The string to encode. + * @param {Object=} options + * @return {!Uint8Array} Encoded bytes, as a Uint8Array. + */ + TextEncoder.prototype.encode = function encode(opt_string, options) { + opt_string = opt_string === undefined ? '' : String(opt_string); + options = ToDictionary(options); + + // NOTE: This option is nonstandard. None of the encodings + // permitted for encoding (i.e. UTF-8, UTF-16) are stateful when + // the input is a USVString so streaming is not necessary. + if (!this._do_not_flush) + this._encoder = encoders[this._encoding.name]({ + fatal: this._fatal === 'fatal'}); + this._do_not_flush = Boolean(options['stream']); + + // 1. Convert input to a stream. + var input = new Stream(stringToCodePoints(opt_string)); + + // 2. Let output be a new stream + var output = []; + + /** @type {?(number|!Array.)} */ + var result; + // 3. While true, run these substeps: + while (true) { + // 1. Let token be the result of reading from input. + var token = input.read(); + if (token === end_of_stream) + break; + // 2. Let result be the result of processing token for encoder, + // input, output. + result = this._encoder.handler(input, token); + if (result === finished) + break; + if (Array.isArray(result)) + output.push.apply(output, /**@type {!Array.}*/(result)); + else + output.push(result); + } + // TODO: Align with spec algorithm. + if (!this._do_not_flush) { + while (true) { + result = this._encoder.handler(input, input.read()); + if (result === finished) + break; + if (Array.isArray(result)) + output.push.apply(output, /**@type {!Array.}*/(result)); + else + output.push(result); + } + this._encoder = null; + } + // 3. If result is finished, convert output into a byte sequence, + // and then return a Uint8Array object wrapping an ArrayBuffer + // containing output. + return new Uint8Array(output); + }; + + + // + // 9. The encoding + // + + // 9.1 utf-8 + + // 9.1.1 utf-8 decoder + /** + * @constructor + * @implements {Decoder} + * @param {{fatal: boolean}} options + */ + function UTF8Decoder(options) { + var fatal = options.fatal; + + // utf-8's decoder's has an associated utf-8 code point, utf-8 + // bytes seen, and utf-8 bytes needed (all initially 0), a utf-8 + // lower boundary (initially 0x80), and a utf-8 upper boundary + // (initially 0xBF). + var /** @type {number} */ utf8_code_point = 0, + /** @type {number} */ utf8_bytes_seen = 0, + /** @type {number} */ utf8_bytes_needed = 0, + /** @type {number} */ utf8_lower_boundary = 0x80, + /** @type {number} */ utf8_upper_boundary = 0xBF; + + /** + * @param {Stream} stream The stream of bytes being decoded. + * @param {number} bite The next byte read from the stream. + * @return {?(number|!Array.)} The next code point(s) + * decoded, or null if not enough data exists in the input + * stream to decode a complete code point. + */ + this.handler = function(stream, bite) { + // 1. If byte is end-of-stream and utf-8 bytes needed is not 0, + // set utf-8 bytes needed to 0 and return error. + if (bite === end_of_stream && utf8_bytes_needed !== 0) { + utf8_bytes_needed = 0; + return decoderError(fatal); + } + + // 2. If byte is end-of-stream, return finished. + if (bite === end_of_stream) + return finished; + + // 3. If utf-8 bytes needed is 0, based on byte: + if (utf8_bytes_needed === 0) { + + // 0x00 to 0x7F + if (inRange(bite, 0x00, 0x7F)) { + // Return a code point whose value is byte. + return bite; + } + + // 0xC2 to 0xDF + else if (inRange(bite, 0xC2, 0xDF)) { + // 1. Set utf-8 bytes needed to 1. + utf8_bytes_needed = 1; + + // 2. Set UTF-8 code point to byte & 0x1F. + utf8_code_point = bite & 0x1F; + } + + // 0xE0 to 0xEF + else if (inRange(bite, 0xE0, 0xEF)) { + // 1. If byte is 0xE0, set utf-8 lower boundary to 0xA0. + if (bite === 0xE0) + utf8_lower_boundary = 0xA0; + // 2. If byte is 0xED, set utf-8 upper boundary to 0x9F. + if (bite === 0xED) + utf8_upper_boundary = 0x9F; + // 3. Set utf-8 bytes needed to 2. + utf8_bytes_needed = 2; + // 4. Set UTF-8 code point to byte & 0xF. + utf8_code_point = bite & 0xF; + } + + // 0xF0 to 0xF4 + else if (inRange(bite, 0xF0, 0xF4)) { + // 1. If byte is 0xF0, set utf-8 lower boundary to 0x90. + if (bite === 0xF0) + utf8_lower_boundary = 0x90; + // 2. If byte is 0xF4, set utf-8 upper boundary to 0x8F. + if (bite === 0xF4) + utf8_upper_boundary = 0x8F; + // 3. Set utf-8 bytes needed to 3. + utf8_bytes_needed = 3; + // 4. Set UTF-8 code point to byte & 0x7. + utf8_code_point = bite & 0x7; + } + + // Otherwise + else { + // Return error. + return decoderError(fatal); + } + + // Return continue. + return null; + } + + // 4. If byte is not in the range utf-8 lower boundary to utf-8 + // upper boundary, inclusive, run these substeps: + if (!inRange(bite, utf8_lower_boundary, utf8_upper_boundary)) { + + // 1. Set utf-8 code point, utf-8 bytes needed, and utf-8 + // bytes seen to 0, set utf-8 lower boundary to 0x80, and set + // utf-8 upper boundary to 0xBF. + utf8_code_point = utf8_bytes_needed = utf8_bytes_seen = 0; + utf8_lower_boundary = 0x80; + utf8_upper_boundary = 0xBF; + + // 2. Prepend byte to stream. + stream.prepend(bite); + + // 3. Return error. + return decoderError(fatal); + } + + // 5. Set utf-8 lower boundary to 0x80 and utf-8 upper boundary + // to 0xBF. + utf8_lower_boundary = 0x80; + utf8_upper_boundary = 0xBF; + + // 6. Set UTF-8 code point to (UTF-8 code point << 6) | (byte & + // 0x3F) + utf8_code_point = (utf8_code_point << 6) | (bite & 0x3F); + + // 7. Increase utf-8 bytes seen by one. + utf8_bytes_seen += 1; + + // 8. If utf-8 bytes seen is not equal to utf-8 bytes needed, + // continue. + if (utf8_bytes_seen !== utf8_bytes_needed) + return null; + + // 9. Let code point be utf-8 code point. + var code_point = utf8_code_point; + + // 10. Set utf-8 code point, utf-8 bytes needed, and utf-8 bytes + // seen to 0. + utf8_code_point = utf8_bytes_needed = utf8_bytes_seen = 0; + + // 11. Return a code point whose value is code point. + return code_point; + }; + } + + // 9.1.2 utf-8 encoder + /** + * @constructor + * @implements {Encoder} + * @param {{fatal: boolean}} options + */ + function UTF8Encoder(options) { + var fatal = options.fatal; + /** + * @param {Stream} stream Input stream. + * @param {number} code_point Next code point read from the stream. + * @return {(number|!Array.)} Byte(s) to emit. + */ + this.handler = function(stream, code_point) { + // 1. If code point is end-of-stream, return finished. + if (code_point === end_of_stream) + return finished; + + // 2. If code point is an ASCII code point, return a byte whose + // value is code point. + if (isASCIICodePoint(code_point)) + return code_point; + + // 3. Set count and offset based on the range code point is in: + var count, offset; + // U+0080 to U+07FF, inclusive: + if (inRange(code_point, 0x0080, 0x07FF)) { + // 1 and 0xC0 + count = 1; + offset = 0xC0; + } + // U+0800 to U+FFFF, inclusive: + else if (inRange(code_point, 0x0800, 0xFFFF)) { + // 2 and 0xE0 + count = 2; + offset = 0xE0; + } + // U+10000 to U+10FFFF, inclusive: + else if (inRange(code_point, 0x10000, 0x10FFFF)) { + // 3 and 0xF0 + count = 3; + offset = 0xF0; + } + + // 4. Let bytes be a byte sequence whose first byte is (code + // point >> (6 × count)) + offset. + var bytes = [(code_point >> (6 * count)) + offset]; + + // 5. Run these substeps while count is greater than 0: + while (count > 0) { + + // 1. Set temp to code point >> (6 × (count − 1)). + var temp = code_point >> (6 * (count - 1)); + + // 2. Append to bytes 0x80 | (temp & 0x3F). + bytes.push(0x80 | (temp & 0x3F)); + + // 3. Decrease count by one. + count -= 1; + } + + // 6. Return bytes bytes, in order. + return bytes; + }; + } + + /** @param {{fatal: boolean}} options */ + encoders['UTF-8'] = function(options) { + return new UTF8Encoder(options); + }; + /** @param {{fatal: boolean}} options */ + decoders['UTF-8'] = function(options) { + return new UTF8Decoder(options); + }; + + // + // 10. Legacy single-byte encodings + // + + // 10.1 single-byte decoder + /** + * @constructor + * @implements {Decoder} + * @param {!Array.} index The encoding index. + * @param {{fatal: boolean}} options + */ + function SingleByteDecoder(index, options) { + var fatal = options.fatal; + /** + * @param {Stream} stream The stream of bytes being decoded. + * @param {number} bite The next byte read from the stream. + * @return {?(number|!Array.)} The next code point(s) + * decoded, or null if not enough data exists in the input + * stream to decode a complete code point. + */ + this.handler = function(stream, bite) { + // 1. If byte is end-of-stream, return finished. + if (bite === end_of_stream) + return finished; + + // 2. If byte is an ASCII byte, return a code point whose value + // is byte. + if (isASCIIByte(bite)) + return bite; + + // 3. Let code point be the index code point for byte − 0x80 in + // index single-byte. + var code_point = index[bite - 0x80]; + + // 4. If code point is null, return error. + if (code_point === null) + return decoderError(fatal); + + // 5. Return a code point whose value is code point. + return code_point; + }; + } + + // 10.2 single-byte encoder + /** + * @constructor + * @implements {Encoder} + * @param {!Array.} index The encoding index. + * @param {{fatal: boolean}} options + */ + function SingleByteEncoder(index, options) { + var fatal = options.fatal; + /** + * @param {Stream} stream Input stream. + * @param {number} code_point Next code point read from the stream. + * @return {(number|!Array.)} Byte(s) to emit. + */ + this.handler = function(stream, code_point) { + // 1. If code point is end-of-stream, return finished. + if (code_point === end_of_stream) + return finished; + + // 2. If code point is an ASCII code point, return a byte whose + // value is code point. + if (isASCIICodePoint(code_point)) + return code_point; + + // 3. Let pointer be the index pointer for code point in index + // single-byte. + var pointer = indexPointerFor(code_point, index); + + // 4. If pointer is null, return error with code point. + if (pointer === null) + encoderError(code_point); + + // 5. Return a byte whose value is pointer + 0x80. + return pointer + 0x80; + }; + } + + (function() { + if (!('encoding-indexes' in global)) + return; + encodings.forEach(function(category) { + if (category.heading !== 'Legacy single-byte encodings') + return; + category.encodings.forEach(function(encoding) { + var name = encoding.name; + var idx = index(name.toLowerCase()); + /** @param {{fatal: boolean}} options */ + decoders[name] = function(options) { + return new SingleByteDecoder(idx, options); + }; + /** @param {{fatal: boolean}} options */ + encoders[name] = function(options) { + return new SingleByteEncoder(idx, options); + }; + }); + }); + }()); + + // + // 11. Legacy multi-byte Chinese (simplified) encodings + // + + // 11.1 gbk + + // 11.1.1 gbk decoder + // gbk's decoder is gb18030's decoder. + /** @param {{fatal: boolean}} options */ + decoders['GBK'] = function(options) { + return new GB18030Decoder(options); + }; + + // 11.1.2 gbk encoder + // gbk's encoder is gb18030's encoder with its gbk flag set. + /** @param {{fatal: boolean}} options */ + encoders['GBK'] = function(options) { + return new GB18030Encoder(options, true); + }; + + // 11.2 gb18030 + + // 11.2.1 gb18030 decoder + /** + * @constructor + * @implements {Decoder} + * @param {{fatal: boolean}} options + */ + function GB18030Decoder(options) { + var fatal = options.fatal; + // gb18030's decoder has an associated gb18030 first, gb18030 + // second, and gb18030 third (all initially 0x00). + var /** @type {number} */ gb18030_first = 0x00, + /** @type {number} */ gb18030_second = 0x00, + /** @type {number} */ gb18030_third = 0x00; + /** + * @param {Stream} stream The stream of bytes being decoded. + * @param {number} bite The next byte read from the stream. + * @return {?(number|!Array.)} The next code point(s) + * decoded, or null if not enough data exists in the input + * stream to decode a complete code point. + */ + this.handler = function(stream, bite) { + // 1. If byte is end-of-stream and gb18030 first, gb18030 + // second, and gb18030 third are 0x00, return finished. + if (bite === end_of_stream && gb18030_first === 0x00 && + gb18030_second === 0x00 && gb18030_third === 0x00) { + return finished; + } + // 2. If byte is end-of-stream, and gb18030 first, gb18030 + // second, or gb18030 third is not 0x00, set gb18030 first, + // gb18030 second, and gb18030 third to 0x00, and return error. + if (bite === end_of_stream && + (gb18030_first !== 0x00 || gb18030_second !== 0x00 || + gb18030_third !== 0x00)) { + gb18030_first = 0x00; + gb18030_second = 0x00; + gb18030_third = 0x00; + decoderError(fatal); + } + var code_point; + // 3. If gb18030 third is not 0x00, run these substeps: + if (gb18030_third !== 0x00) { + // 1. Let code point be null. + code_point = null; + // 2. If byte is in the range 0x30 to 0x39, inclusive, set + // code point to the index gb18030 ranges code point for + // (((gb18030 first − 0x81) × 10 + gb18030 second − 0x30) × + // 126 + gb18030 third − 0x81) × 10 + byte − 0x30. + if (inRange(bite, 0x30, 0x39)) { + code_point = indexGB18030RangesCodePointFor( + (((gb18030_first - 0x81) * 10 + gb18030_second - 0x30) * 126 + + gb18030_third - 0x81) * 10 + bite - 0x30); + } + + // 3. Let buffer be a byte sequence consisting of gb18030 + // second, gb18030 third, and byte, in order. + var buffer = [gb18030_second, gb18030_third, bite]; + + // 4. Set gb18030 first, gb18030 second, and gb18030 third to + // 0x00. + gb18030_first = 0x00; + gb18030_second = 0x00; + gb18030_third = 0x00; + + // 5. If code point is null, prepend buffer to stream and + // return error. + if (code_point === null) { + stream.prepend(buffer); + return decoderError(fatal); + } + + // 6. Return a code point whose value is code point. + return code_point; + } + + // 4. If gb18030 second is not 0x00, run these substeps: + if (gb18030_second !== 0x00) { + + // 1. If byte is in the range 0x81 to 0xFE, inclusive, set + // gb18030 third to byte and return continue. + if (inRange(bite, 0x81, 0xFE)) { + gb18030_third = bite; + return null; + } + + // 2. Prepend gb18030 second followed by byte to stream, set + // gb18030 first and gb18030 second to 0x00, and return error. + stream.prepend([gb18030_second, bite]); + gb18030_first = 0x00; + gb18030_second = 0x00; + return decoderError(fatal); + } + + // 5. If gb18030 first is not 0x00, run these substeps: + if (gb18030_first !== 0x00) { + + // 1. If byte is in the range 0x30 to 0x39, inclusive, set + // gb18030 second to byte and return continue. + if (inRange(bite, 0x30, 0x39)) { + gb18030_second = bite; + return null; + } + + // 2. Let lead be gb18030 first, let pointer be null, and set + // gb18030 first to 0x00. + var lead = gb18030_first; + var pointer = null; + gb18030_first = 0x00; + + // 3. Let offset be 0x40 if byte is less than 0x7F and 0x41 + // otherwise. + var offset = bite < 0x7F ? 0x40 : 0x41; + + // 4. If byte is in the range 0x40 to 0x7E, inclusive, or 0x80 + // to 0xFE, inclusive, set pointer to (lead − 0x81) × 190 + + // (byte − offset). + if (inRange(bite, 0x40, 0x7E) || inRange(bite, 0x80, 0xFE)) + pointer = (lead - 0x81) * 190 + (bite - offset); + + // 5. Let code point be null if pointer is null and the index + // code point for pointer in index gb18030 otherwise. + code_point = pointer === null ? null : + indexCodePointFor(pointer, index('gb18030')); + + // 6. If code point is null and byte is an ASCII byte, prepend + // byte to stream. + if (code_point === null && isASCIIByte(bite)) + stream.prepend(bite); + + // 7. If code point is null, return error. + if (code_point === null) + return decoderError(fatal); + + // 8. Return a code point whose value is code point. + return code_point; + } + + // 6. If byte is an ASCII byte, return a code point whose value + // is byte. + if (isASCIIByte(bite)) + return bite; + + // 7. If byte is 0x80, return code point U+20AC. + if (bite === 0x80) + return 0x20AC; + + // 8. If byte is in the range 0x81 to 0xFE, inclusive, set + // gb18030 first to byte and return continue. + if (inRange(bite, 0x81, 0xFE)) { + gb18030_first = bite; + return null; + } + + // 9. Return error. + return decoderError(fatal); + }; + } + + // 11.2.2 gb18030 encoder + /** + * @constructor + * @implements {Encoder} + * @param {{fatal: boolean}} options + * @param {boolean=} gbk_flag + */ + function GB18030Encoder(options, gbk_flag) { + var fatal = options.fatal; + // gb18030's decoder has an associated gbk flag (initially unset). + /** + * @param {Stream} stream Input stream. + * @param {number} code_point Next code point read from the stream. + * @return {(number|!Array.)} Byte(s) to emit. + */ + this.handler = function(stream, code_point) { + // 1. If code point is end-of-stream, return finished. + if (code_point === end_of_stream) + return finished; + + // 2. If code point is an ASCII code point, return a byte whose + // value is code point. + if (isASCIICodePoint(code_point)) + return code_point; + + // 3. If code point is U+E5E5, return error with code point. + if (code_point === 0xE5E5) + return encoderError(code_point); + + // 4. If the gbk flag is set and code point is U+20AC, return + // byte 0x80. + if (gbk_flag && code_point === 0x20AC) + return 0x80; + + // 5. Let pointer be the index pointer for code point in index + // gb18030. + var pointer = indexPointerFor(code_point, index('gb18030')); + + // 6. If pointer is not null, run these substeps: + if (pointer !== null) { + + // 1. Let lead be floor(pointer / 190) + 0x81. + var lead = floor(pointer / 190) + 0x81; + + // 2. Let trail be pointer % 190. + var trail = pointer % 190; + + // 3. Let offset be 0x40 if trail is less than 0x3F and 0x41 otherwise. + var offset = trail < 0x3F ? 0x40 : 0x41; + + // 4. Return two bytes whose values are lead and trail + offset. + return [lead, trail + offset]; + } + + // 7. If gbk flag is set, return error with code point. + if (gbk_flag) + return encoderError(code_point); + + // 8. Set pointer to the index gb18030 ranges pointer for code + // point. + pointer = indexGB18030RangesPointerFor(code_point); + + // 9. Let byte1 be floor(pointer / 10 / 126 / 10). + var byte1 = floor(pointer / 10 / 126 / 10); + + // 10. Set pointer to pointer − byte1 × 10 × 126 × 10. + pointer = pointer - byte1 * 10 * 126 * 10; + + // 11. Let byte2 be floor(pointer / 10 / 126). + var byte2 = floor(pointer / 10 / 126); + + // 12. Set pointer to pointer − byte2 × 10 × 126. + pointer = pointer - byte2 * 10 * 126; + + // 13. Let byte3 be floor(pointer / 10). + var byte3 = floor(pointer / 10); + + // 14. Let byte4 be pointer − byte3 × 10. + var byte4 = pointer - byte3 * 10; + + // 15. Return four bytes whose values are byte1 + 0x81, byte2 + + // 0x30, byte3 + 0x81, byte4 + 0x30. + return [byte1 + 0x81, + byte2 + 0x30, + byte3 + 0x81, + byte4 + 0x30]; + }; + } + + /** @param {{fatal: boolean}} options */ + encoders['gb18030'] = function(options) { + return new GB18030Encoder(options); + }; + /** @param {{fatal: boolean}} options */ + decoders['gb18030'] = function(options) { + return new GB18030Decoder(options); + }; + + + // + // 12. Legacy multi-byte Chinese (traditional) encodings + // + + // 12.1 Big5 + + // 12.1.1 Big5 decoder + /** + * @constructor + * @implements {Decoder} + * @param {{fatal: boolean}} options + */ + function Big5Decoder(options) { + var fatal = options.fatal; + // Big5's decoder has an associated Big5 lead (initially 0x00). + var /** @type {number} */ Big5_lead = 0x00; + + /** + * @param {Stream} stream The stream of bytes being decoded. + * @param {number} bite The next byte read from the stream. + * @return {?(number|!Array.)} The next code point(s) + * decoded, or null if not enough data exists in the input + * stream to decode a complete code point. + */ + this.handler = function(stream, bite) { + // 1. If byte is end-of-stream and Big5 lead is not 0x00, set + // Big5 lead to 0x00 and return error. + if (bite === end_of_stream && Big5_lead !== 0x00) { + Big5_lead = 0x00; + return decoderError(fatal); + } + + // 2. If byte is end-of-stream and Big5 lead is 0x00, return + // finished. + if (bite === end_of_stream && Big5_lead === 0x00) + return finished; + + // 3. If Big5 lead is not 0x00, let lead be Big5 lead, let + // pointer be null, set Big5 lead to 0x00, and then run these + // substeps: + if (Big5_lead !== 0x00) { + var lead = Big5_lead; + var pointer = null; + Big5_lead = 0x00; + + // 1. Let offset be 0x40 if byte is less than 0x7F and 0x62 + // otherwise. + var offset = bite < 0x7F ? 0x40 : 0x62; + + // 2. If byte is in the range 0x40 to 0x7E, inclusive, or 0xA1 + // to 0xFE, inclusive, set pointer to (lead − 0x81) × 157 + + // (byte − offset). + if (inRange(bite, 0x40, 0x7E) || inRange(bite, 0xA1, 0xFE)) + pointer = (lead - 0x81) * 157 + (bite - offset); + + // 3. If there is a row in the table below whose first column + // is pointer, return the two code points listed in its second + // column + // Pointer | Code points + // --------+-------------- + // 1133 | U+00CA U+0304 + // 1135 | U+00CA U+030C + // 1164 | U+00EA U+0304 + // 1166 | U+00EA U+030C + switch (pointer) { + case 1133: return [0x00CA, 0x0304]; + case 1135: return [0x00CA, 0x030C]; + case 1164: return [0x00EA, 0x0304]; + case 1166: return [0x00EA, 0x030C]; + } + + // 4. Let code point be null if pointer is null and the index + // code point for pointer in index Big5 otherwise. + var code_point = (pointer === null) ? null : + indexCodePointFor(pointer, index('big5')); + + // 5. If code point is null and byte is an ASCII byte, prepend + // byte to stream. + if (code_point === null && isASCIIByte(bite)) + stream.prepend(bite); + + // 6. If code point is null, return error. + if (code_point === null) + return decoderError(fatal); + + // 7. Return a code point whose value is code point. + return code_point; + } + + // 4. If byte is an ASCII byte, return a code point whose value + // is byte. + if (isASCIIByte(bite)) + return bite; + + // 5. If byte is in the range 0x81 to 0xFE, inclusive, set Big5 + // lead to byte and return continue. + if (inRange(bite, 0x81, 0xFE)) { + Big5_lead = bite; + return null; + } + + // 6. Return error. + return decoderError(fatal); + }; + } + + // 12.1.2 Big5 encoder + /** + * @constructor + * @implements {Encoder} + * @param {{fatal: boolean}} options + */ + function Big5Encoder(options) { + var fatal = options.fatal; + /** + * @param {Stream} stream Input stream. + * @param {number} code_point Next code point read from the stream. + * @return {(number|!Array.)} Byte(s) to emit. + */ + this.handler = function(stream, code_point) { + // 1. If code point is end-of-stream, return finished. + if (code_point === end_of_stream) + return finished; + + // 2. If code point is an ASCII code point, return a byte whose + // value is code point. + if (isASCIICodePoint(code_point)) + return code_point; + + // 3. Let pointer be the index Big5 pointer for code point. + var pointer = indexBig5PointerFor(code_point); + + // 4. If pointer is null, return error with code point. + if (pointer === null) + return encoderError(code_point); + + // 5. Let lead be floor(pointer / 157) + 0x81. + var lead = floor(pointer / 157) + 0x81; + + // 6. If lead is less than 0xA1, return error with code point. + if (lead < 0xA1) + return encoderError(code_point); + + // 7. Let trail be pointer % 157. + var trail = pointer % 157; + + // 8. Let offset be 0x40 if trail is less than 0x3F and 0x62 + // otherwise. + var offset = trail < 0x3F ? 0x40 : 0x62; + + // Return two bytes whose values are lead and trail + offset. + return [lead, trail + offset]; + }; + } + + /** @param {{fatal: boolean}} options */ + encoders['Big5'] = function(options) { + return new Big5Encoder(options); + }; + /** @param {{fatal: boolean}} options */ + decoders['Big5'] = function(options) { + return new Big5Decoder(options); + }; + + + // + // 13. Legacy multi-byte Japanese encodings + // + + // 13.1 euc-jp + + // 13.1.1 euc-jp decoder + /** + * @constructor + * @implements {Decoder} + * @param {{fatal: boolean}} options + */ + function EUCJPDecoder(options) { + var fatal = options.fatal; + + // euc-jp's decoder has an associated euc-jp jis0212 flag + // (initially unset) and euc-jp lead (initially 0x00). + var /** @type {boolean} */ eucjp_jis0212_flag = false, + /** @type {number} */ eucjp_lead = 0x00; + + /** + * @param {Stream} stream The stream of bytes being decoded. + * @param {number} bite The next byte read from the stream. + * @return {?(number|!Array.)} The next code point(s) + * decoded, or null if not enough data exists in the input + * stream to decode a complete code point. + */ + this.handler = function(stream, bite) { + // 1. If byte is end-of-stream and euc-jp lead is not 0x00, set + // euc-jp lead to 0x00, and return error. + if (bite === end_of_stream && eucjp_lead !== 0x00) { + eucjp_lead = 0x00; + return decoderError(fatal); + } + + // 2. If byte is end-of-stream and euc-jp lead is 0x00, return + // finished. + if (bite === end_of_stream && eucjp_lead === 0x00) + return finished; + + // 3. If euc-jp lead is 0x8E and byte is in the range 0xA1 to + // 0xDF, inclusive, set euc-jp lead to 0x00 and return a code + // point whose value is 0xFF61 − 0xA1 + byte. + if (eucjp_lead === 0x8E && inRange(bite, 0xA1, 0xDF)) { + eucjp_lead = 0x00; + return 0xFF61 - 0xA1 + bite; + } + + // 4. If euc-jp lead is 0x8F and byte is in the range 0xA1 to + // 0xFE, inclusive, set the euc-jp jis0212 flag, set euc-jp lead + // to byte, and return continue. + if (eucjp_lead === 0x8F && inRange(bite, 0xA1, 0xFE)) { + eucjp_jis0212_flag = true; + eucjp_lead = bite; + return null; + } + + // 5. If euc-jp lead is not 0x00, let lead be euc-jp lead, set + // euc-jp lead to 0x00, and run these substeps: + if (eucjp_lead !== 0x00) { + var lead = eucjp_lead; + eucjp_lead = 0x00; + + // 1. Let code point be null. + var code_point = null; + + // 2. If lead and byte are both in the range 0xA1 to 0xFE, + // inclusive, set code point to the index code point for (lead + // − 0xA1) × 94 + byte − 0xA1 in index jis0208 if the euc-jp + // jis0212 flag is unset and in index jis0212 otherwise. + if (inRange(lead, 0xA1, 0xFE) && inRange(bite, 0xA1, 0xFE)) { + code_point = indexCodePointFor( + (lead - 0xA1) * 94 + (bite - 0xA1), + index(!eucjp_jis0212_flag ? 'jis0208' : 'jis0212')); + } + + // 3. Unset the euc-jp jis0212 flag. + eucjp_jis0212_flag = false; + + // 4. If byte is not in the range 0xA1 to 0xFE, inclusive, + // prepend byte to stream. + if (!inRange(bite, 0xA1, 0xFE)) + stream.prepend(bite); + + // 5. If code point is null, return error. + if (code_point === null) + return decoderError(fatal); + + // 6. Return a code point whose value is code point. + return code_point; + } + + // 6. If byte is an ASCII byte, return a code point whose value + // is byte. + if (isASCIIByte(bite)) + return bite; + + // 7. If byte is 0x8E, 0x8F, or in the range 0xA1 to 0xFE, + // inclusive, set euc-jp lead to byte and return continue. + if (bite === 0x8E || bite === 0x8F || inRange(bite, 0xA1, 0xFE)) { + eucjp_lead = bite; + return null; + } + + // 8. Return error. + return decoderError(fatal); + }; + } + + // 13.1.2 euc-jp encoder + /** + * @constructor + * @implements {Encoder} + * @param {{fatal: boolean}} options + */ + function EUCJPEncoder(options) { + var fatal = options.fatal; + /** + * @param {Stream} stream Input stream. + * @param {number} code_point Next code point read from the stream. + * @return {(number|!Array.)} Byte(s) to emit. + */ + this.handler = function(stream, code_point) { + // 1. If code point is end-of-stream, return finished. + if (code_point === end_of_stream) + return finished; + + // 2. If code point is an ASCII code point, return a byte whose + // value is code point. + if (isASCIICodePoint(code_point)) + return code_point; + + // 3. If code point is U+00A5, return byte 0x5C. + if (code_point === 0x00A5) + return 0x5C; + + // 4. If code point is U+203E, return byte 0x7E. + if (code_point === 0x203E) + return 0x7E; + + // 5. If code point is in the range U+FF61 to U+FF9F, inclusive, + // return two bytes whose values are 0x8E and code point − + // 0xFF61 + 0xA1. + if (inRange(code_point, 0xFF61, 0xFF9F)) + return [0x8E, code_point - 0xFF61 + 0xA1]; + + // 6. If code point is U+2212, set it to U+FF0D. + if (code_point === 0x2212) + code_point = 0xFF0D; + + // 7. Let pointer be the index pointer for code point in index + // jis0208. + var pointer = indexPointerFor(code_point, index('jis0208')); + + // 8. If pointer is null, return error with code point. + if (pointer === null) + return encoderError(code_point); + + // 9. Let lead be floor(pointer / 94) + 0xA1. + var lead = floor(pointer / 94) + 0xA1; + + // 10. Let trail be pointer % 94 + 0xA1. + var trail = pointer % 94 + 0xA1; + + // 11. Return two bytes whose values are lead and trail. + return [lead, trail]; + }; + } + + /** @param {{fatal: boolean}} options */ + encoders['EUC-JP'] = function(options) { + return new EUCJPEncoder(options); + }; + /** @param {{fatal: boolean}} options */ + decoders['EUC-JP'] = function(options) { + return new EUCJPDecoder(options); + }; + + // 13.2 iso-2022-jp + + // 13.2.1 iso-2022-jp decoder + /** + * @constructor + * @implements {Decoder} + * @param {{fatal: boolean}} options + */ + function ISO2022JPDecoder(options) { + var fatal = options.fatal; + /** @enum */ + var states = { + ASCII: 0, + Roman: 1, + Katakana: 2, + LeadByte: 3, + TrailByte: 4, + EscapeStart: 5, + Escape: 6 + }; + // iso-2022-jp's decoder has an associated iso-2022-jp decoder + // state (initially ASCII), iso-2022-jp decoder output state + // (initially ASCII), iso-2022-jp lead (initially 0x00), and + // iso-2022-jp output flag (initially unset). + var /** @type {number} */ iso2022jp_decoder_state = states.ASCII, + /** @type {number} */ iso2022jp_decoder_output_state = states.ASCII, + /** @type {number} */ iso2022jp_lead = 0x00, + /** @type {boolean} */ iso2022jp_output_flag = false; + /** + * @param {Stream} stream The stream of bytes being decoded. + * @param {number} bite The next byte read from the stream. + * @return {?(number|!Array.)} The next code point(s) + * decoded, or null if not enough data exists in the input + * stream to decode a complete code point. + */ + this.handler = function(stream, bite) { + // switching on iso-2022-jp decoder state: + switch (iso2022jp_decoder_state) { + default: + case states.ASCII: + // ASCII + // Based on byte: + + // 0x1B + if (bite === 0x1B) { + // Set iso-2022-jp decoder state to escape start and return + // continue. + iso2022jp_decoder_state = states.EscapeStart; + return null; + } + + // 0x00 to 0x7F, excluding 0x0E, 0x0F, and 0x1B + if (inRange(bite, 0x00, 0x7F) && bite !== 0x0E + && bite !== 0x0F && bite !== 0x1B) { + // Unset the iso-2022-jp output flag and return a code point + // whose value is byte. + iso2022jp_output_flag = false; + return bite; + } + + // end-of-stream + if (bite === end_of_stream) { + // Return finished. + return finished; + } + + // Otherwise + // Unset the iso-2022-jp output flag and return error. + iso2022jp_output_flag = false; + return decoderError(fatal); + + case states.Roman: + // Roman + // Based on byte: + + // 0x1B + if (bite === 0x1B) { + // Set iso-2022-jp decoder state to escape start and return + // continue. + iso2022jp_decoder_state = states.EscapeStart; + return null; + } + + // 0x5C + if (bite === 0x5C) { + // Unset the iso-2022-jp output flag and return code point + // U+00A5. + iso2022jp_output_flag = false; + return 0x00A5; + } + + // 0x7E + if (bite === 0x7E) { + // Unset the iso-2022-jp output flag and return code point + // U+203E. + iso2022jp_output_flag = false; + return 0x203E; + } + + // 0x00 to 0x7F, excluding 0x0E, 0x0F, 0x1B, 0x5C, and 0x7E + if (inRange(bite, 0x00, 0x7F) && bite !== 0x0E && bite !== 0x0F + && bite !== 0x1B && bite !== 0x5C && bite !== 0x7E) { + // Unset the iso-2022-jp output flag and return a code point + // whose value is byte. + iso2022jp_output_flag = false; + return bite; + } + + // end-of-stream + if (bite === end_of_stream) { + // Return finished. + return finished; + } + + // Otherwise + // Unset the iso-2022-jp output flag and return error. + iso2022jp_output_flag = false; + return decoderError(fatal); + + case states.Katakana: + // Katakana + // Based on byte: + + // 0x1B + if (bite === 0x1B) { + // Set iso-2022-jp decoder state to escape start and return + // continue. + iso2022jp_decoder_state = states.EscapeStart; + return null; + } + + // 0x21 to 0x5F + if (inRange(bite, 0x21, 0x5F)) { + // Unset the iso-2022-jp output flag and return a code point + // whose value is 0xFF61 − 0x21 + byte. + iso2022jp_output_flag = false; + return 0xFF61 - 0x21 + bite; + } + + // end-of-stream + if (bite === end_of_stream) { + // Return finished. + return finished; + } + + // Otherwise + // Unset the iso-2022-jp output flag and return error. + iso2022jp_output_flag = false; + return decoderError(fatal); + + case states.LeadByte: + // Lead byte + // Based on byte: + + // 0x1B + if (bite === 0x1B) { + // Set iso-2022-jp decoder state to escape start and return + // continue. + iso2022jp_decoder_state = states.EscapeStart; + return null; + } + + // 0x21 to 0x7E + if (inRange(bite, 0x21, 0x7E)) { + // Unset the iso-2022-jp output flag, set iso-2022-jp lead + // to byte, iso-2022-jp decoder state to trail byte, and + // return continue. + iso2022jp_output_flag = false; + iso2022jp_lead = bite; + iso2022jp_decoder_state = states.TrailByte; + return null; + } + + // end-of-stream + if (bite === end_of_stream) { + // Return finished. + return finished; + } + + // Otherwise + // Unset the iso-2022-jp output flag and return error. + iso2022jp_output_flag = false; + return decoderError(fatal); + + case states.TrailByte: + // Trail byte + // Based on byte: + + // 0x1B + if (bite === 0x1B) { + // Set iso-2022-jp decoder state to escape start and return + // continue. + iso2022jp_decoder_state = states.EscapeStart; + return decoderError(fatal); + } + + // 0x21 to 0x7E + if (inRange(bite, 0x21, 0x7E)) { + // 1. Set the iso-2022-jp decoder state to lead byte. + iso2022jp_decoder_state = states.LeadByte; + + // 2. Let pointer be (iso-2022-jp lead − 0x21) × 94 + byte − 0x21. + var pointer = (iso2022jp_lead - 0x21) * 94 + bite - 0x21; + + // 3. Let code point be the index code point for pointer in + // index jis0208. + var code_point = indexCodePointFor(pointer, index('jis0208')); + + // 4. If code point is null, return error. + if (code_point === null) + return decoderError(fatal); + + // 5. Return a code point whose value is code point. + return code_point; + } + + // end-of-stream + if (bite === end_of_stream) { + // Set the iso-2022-jp decoder state to lead byte, prepend + // byte to stream, and return error. + iso2022jp_decoder_state = states.LeadByte; + stream.prepend(bite); + return decoderError(fatal); + } + + // Otherwise + // Set iso-2022-jp decoder state to lead byte and return + // error. + iso2022jp_decoder_state = states.LeadByte; + return decoderError(fatal); + + case states.EscapeStart: + // Escape start + + // 1. If byte is either 0x24 or 0x28, set iso-2022-jp lead to + // byte, iso-2022-jp decoder state to escape, and return + // continue. + if (bite === 0x24 || bite === 0x28) { + iso2022jp_lead = bite; + iso2022jp_decoder_state = states.Escape; + return null; + } + + // 2. Prepend byte to stream. + stream.prepend(bite); + + // 3. Unset the iso-2022-jp output flag, set iso-2022-jp + // decoder state to iso-2022-jp decoder output state, and + // return error. + iso2022jp_output_flag = false; + iso2022jp_decoder_state = iso2022jp_decoder_output_state; + return decoderError(fatal); + + case states.Escape: + // Escape + + // 1. Let lead be iso-2022-jp lead and set iso-2022-jp lead to + // 0x00. + var lead = iso2022jp_lead; + iso2022jp_lead = 0x00; + + // 2. Let state be null. + var state = null; + + // 3. If lead is 0x28 and byte is 0x42, set state to ASCII. + if (lead === 0x28 && bite === 0x42) + state = states.ASCII; + + // 4. If lead is 0x28 and byte is 0x4A, set state to Roman. + if (lead === 0x28 && bite === 0x4A) + state = states.Roman; + + // 5. If lead is 0x28 and byte is 0x49, set state to Katakana. + if (lead === 0x28 && bite === 0x49) + state = states.Katakana; + + // 6. If lead is 0x24 and byte is either 0x40 or 0x42, set + // state to lead byte. + if (lead === 0x24 && (bite === 0x40 || bite === 0x42)) + state = states.LeadByte; + + // 7. If state is non-null, run these substeps: + if (state !== null) { + // 1. Set iso-2022-jp decoder state and iso-2022-jp decoder + // output state to states. + iso2022jp_decoder_state = iso2022jp_decoder_state = state; + + // 2. Let output flag be the iso-2022-jp output flag. + var output_flag = iso2022jp_output_flag; + + // 3. Set the iso-2022-jp output flag. + iso2022jp_output_flag = true; + + // 4. Return continue, if output flag is unset, and error + // otherwise. + return !output_flag ? null : decoderError(fatal); + } + + // 8. Prepend lead and byte to stream. + stream.prepend([lead, bite]); + + // 9. Unset the iso-2022-jp output flag, set iso-2022-jp + // decoder state to iso-2022-jp decoder output state and + // return error. + iso2022jp_output_flag = false; + iso2022jp_decoder_state = iso2022jp_decoder_output_state; + return decoderError(fatal); + } + }; + } + + // 13.2.2 iso-2022-jp encoder + /** + * @constructor + * @implements {Encoder} + * @param {{fatal: boolean}} options + */ + function ISO2022JPEncoder(options) { + var fatal = options.fatal; + // iso-2022-jp's encoder has an associated iso-2022-jp encoder + // state which is one of ASCII, Roman, and jis0208 (initially + // ASCII). + /** @enum */ + var states = { + ASCII: 0, + Roman: 1, + jis0208: 2 + }; + var /** @type {number} */ iso2022jp_state = states.ASCII; + /** + * @param {Stream} stream Input stream. + * @param {number} code_point Next code point read from the stream. + * @return {(number|!Array.)} Byte(s) to emit. + */ + this.handler = function(stream, code_point) { + // 1. If code point is end-of-stream and iso-2022-jp encoder + // state is not ASCII, prepend code point to stream, set + // iso-2022-jp encoder state to ASCII, and return three bytes + // 0x1B 0x28 0x42. + if (code_point === end_of_stream && + iso2022jp_state !== states.ASCII) { + stream.prepend(code_point); + iso2022jp_state = states.ASCII; + return [0x1B, 0x28, 0x42]; + } + + // 2. If code point is end-of-stream and iso-2022-jp encoder + // state is ASCII, return finished. + if (code_point === end_of_stream && iso2022jp_state === states.ASCII) + return finished; + + // 3. If ISO-2022-JP encoder state is ASCII or Roman, and code + // point is U+000E, U+000F, or U+001B, return error with U+FFFD. + if ((iso2022jp_state === states.ASCII || + iso2022jp_state === states.Roman) && + (code_point === 0x000E || code_point === 0x000F || + code_point === 0x001B)) { + return encoderError(0xFFFD); + } + + // 4. If iso-2022-jp encoder state is ASCII and code point is an + // ASCII code point, return a byte whose value is code point. + if (iso2022jp_state === states.ASCII && + isASCIICodePoint(code_point)) + return code_point; + + // 5. If iso-2022-jp encoder state is Roman and code point is an + // ASCII code point, excluding U+005C and U+007E, or is U+00A5 + // or U+203E, run these substeps: + if (iso2022jp_state === states.Roman && + ((isASCIICodePoint(code_point) && + code_point !== 0x005C && code_point !== 0x007E) || + (code_point == 0x00A5 || code_point == 0x203E))) { + + // 1. If code point is an ASCII code point, return a byte + // whose value is code point. + if (isASCIICodePoint(code_point)) + return code_point; + + // 2. If code point is U+00A5, return byte 0x5C. + if (code_point === 0x00A5) + return 0x5C; + + // 3. If code point is U+203E, return byte 0x7E. + if (code_point === 0x203E) + return 0x7E; + } + + // 6. If code point is an ASCII code point, and iso-2022-jp + // encoder state is not ASCII, prepend code point to stream, set + // iso-2022-jp encoder state to ASCII, and return three bytes + // 0x1B 0x28 0x42. + if (isASCIICodePoint(code_point) && + iso2022jp_state !== states.ASCII) { + stream.prepend(code_point); + iso2022jp_state = states.ASCII; + return [0x1B, 0x28, 0x42]; + } + + // 7. If code point is either U+00A5 or U+203E, and iso-2022-jp + // encoder state is not Roman, prepend code point to stream, set + // iso-2022-jp encoder state to Roman, and return three bytes + // 0x1B 0x28 0x4A. + if ((code_point === 0x00A5 || code_point === 0x203E) && + iso2022jp_state !== states.Roman) { + stream.prepend(code_point); + iso2022jp_state = states.Roman; + return [0x1B, 0x28, 0x4A]; + } + + // 8. If code point is U+2212, set it to U+FF0D. + if (code_point === 0x2212) + code_point = 0xFF0D; + + // 9. Let pointer be the index pointer for code point in index + // jis0208. + var pointer = indexPointerFor(code_point, index('jis0208')); + + // 10. If pointer is null, return error with code point. + if (pointer === null) + return encoderError(code_point); + + // 11. If iso-2022-jp encoder state is not jis0208, prepend code + // point to stream, set iso-2022-jp encoder state to jis0208, + // and return three bytes 0x1B 0x24 0x42. + if (iso2022jp_state !== states.jis0208) { + stream.prepend(code_point); + iso2022jp_state = states.jis0208; + return [0x1B, 0x24, 0x42]; + } + + // 12. Let lead be floor(pointer / 94) + 0x21. + var lead = floor(pointer / 94) + 0x21; + + // 13. Let trail be pointer % 94 + 0x21. + var trail = pointer % 94 + 0x21; + + // 14. Return two bytes whose values are lead and trail. + return [lead, trail]; + }; + } + + /** @param {{fatal: boolean}} options */ + encoders['ISO-2022-JP'] = function(options) { + return new ISO2022JPEncoder(options); + }; + /** @param {{fatal: boolean}} options */ + decoders['ISO-2022-JP'] = function(options) { + return new ISO2022JPDecoder(options); + }; + + // 13.3 Shift_JIS + + // 13.3.1 Shift_JIS decoder + /** + * @constructor + * @implements {Decoder} + * @param {{fatal: boolean}} options + */ + function ShiftJISDecoder(options) { + var fatal = options.fatal; + // Shift_JIS's decoder has an associated Shift_JIS lead (initially + // 0x00). + var /** @type {number} */ Shift_JIS_lead = 0x00; + /** + * @param {Stream} stream The stream of bytes being decoded. + * @param {number} bite The next byte read from the stream. + * @return {?(number|!Array.)} The next code point(s) + * decoded, or null if not enough data exists in the input + * stream to decode a complete code point. + */ + this.handler = function(stream, bite) { + // 1. If byte is end-of-stream and Shift_JIS lead is not 0x00, + // set Shift_JIS lead to 0x00 and return error. + if (bite === end_of_stream && Shift_JIS_lead !== 0x00) { + Shift_JIS_lead = 0x00; + return decoderError(fatal); + } + + // 2. If byte is end-of-stream and Shift_JIS lead is 0x00, + // return finished. + if (bite === end_of_stream && Shift_JIS_lead === 0x00) + return finished; + + // 3. If Shift_JIS lead is not 0x00, let lead be Shift_JIS lead, + // let pointer be null, set Shift_JIS lead to 0x00, and then run + // these substeps: + if (Shift_JIS_lead !== 0x00) { + var lead = Shift_JIS_lead; + var pointer = null; + Shift_JIS_lead = 0x00; + + // 1. Let offset be 0x40, if byte is less than 0x7F, and 0x41 + // otherwise. + var offset = (bite < 0x7F) ? 0x40 : 0x41; + + // 2. Let lead offset be 0x81, if lead is less than 0xA0, and + // 0xC1 otherwise. + var lead_offset = (lead < 0xA0) ? 0x81 : 0xC1; + + // 3. If byte is in the range 0x40 to 0x7E, inclusive, or 0x80 + // to 0xFC, inclusive, set pointer to (lead − lead offset) × + // 188 + byte − offset. + if (inRange(bite, 0x40, 0x7E) || inRange(bite, 0x80, 0xFC)) + pointer = (lead - lead_offset) * 188 + bite - offset; + + // 4. If pointer is in the range 8836 to 10715, inclusive, + // return a code point whose value is 0xE000 − 8836 + pointer. + if (inRange(pointer, 8836, 10715)) + return 0xE000 - 8836 + pointer; + + // 5. Let code point be null, if pointer is null, and the + // index code point for pointer in index jis0208 otherwise. + var code_point = (pointer === null) ? null : + indexCodePointFor(pointer, index('jis0208')); + + // 6. If code point is null and byte is an ASCII byte, prepend + // byte to stream. + if (code_point === null && isASCIIByte(bite)) + stream.prepend(bite); + + // 7. If code point is null, return error. + if (code_point === null) + return decoderError(fatal); + + // 8. Return a code point whose value is code point. + return code_point; + } + + // 4. If byte is an ASCII byte or 0x80, return a code point + // whose value is byte. + if (isASCIIByte(bite) || bite === 0x80) + return bite; + + // 5. If byte is in the range 0xA1 to 0xDF, inclusive, return a + // code point whose value is 0xFF61 − 0xA1 + byte. + if (inRange(bite, 0xA1, 0xDF)) + return 0xFF61 - 0xA1 + bite; + + // 6. If byte is in the range 0x81 to 0x9F, inclusive, or 0xE0 + // to 0xFC, inclusive, set Shift_JIS lead to byte and return + // continue. + if (inRange(bite, 0x81, 0x9F) || inRange(bite, 0xE0, 0xFC)) { + Shift_JIS_lead = bite; + return null; + } + + // 7. Return error. + return decoderError(fatal); + }; + } + + // 13.3.2 Shift_JIS encoder + /** + * @constructor + * @implements {Encoder} + * @param {{fatal: boolean}} options + */ + function ShiftJISEncoder(options) { + var fatal = options.fatal; + /** + * @param {Stream} stream Input stream. + * @param {number} code_point Next code point read from the stream. + * @return {(number|!Array.)} Byte(s) to emit. + */ + this.handler = function(stream, code_point) { + // 1. If code point is end-of-stream, return finished. + if (code_point === end_of_stream) + return finished; + + // 2. If code point is an ASCII code point or U+0080, return a + // byte whose value is code point. + if (isASCIICodePoint(code_point) || code_point === 0x0080) + return code_point; + + // 3. If code point is U+00A5, return byte 0x5C. + if (code_point === 0x00A5) + return 0x5C; + + // 4. If code point is U+203E, return byte 0x7E. + if (code_point === 0x203E) + return 0x7E; + + // 5. If code point is in the range U+FF61 to U+FF9F, inclusive, + // return a byte whose value is code point − 0xFF61 + 0xA1. + if (inRange(code_point, 0xFF61, 0xFF9F)) + return code_point - 0xFF61 + 0xA1; + + // 6. If code point is U+2212, set it to U+FF0D. + if (code_point === 0x2212) + code_point = 0xFF0D; + + // 7. Let pointer be the index Shift_JIS pointer for code point. + var pointer = indexShiftJISPointerFor(code_point); + + // 8. If pointer is null, return error with code point. + if (pointer === null) + return encoderError(code_point); + + // 9. Let lead be floor(pointer / 188). + var lead = floor(pointer / 188); + + // 10. Let lead offset be 0x81, if lead is less than 0x1F, and + // 0xC1 otherwise. + var lead_offset = (lead < 0x1F) ? 0x81 : 0xC1; + + // 11. Let trail be pointer % 188. + var trail = pointer % 188; + + // 12. Let offset be 0x40, if trail is less than 0x3F, and 0x41 + // otherwise. + var offset = (trail < 0x3F) ? 0x40 : 0x41; + + // 13. Return two bytes whose values are lead + lead offset and + // trail + offset. + return [lead + lead_offset, trail + offset]; + }; + } + + /** @param {{fatal: boolean}} options */ + encoders['Shift_JIS'] = function(options) { + return new ShiftJISEncoder(options); + }; + /** @param {{fatal: boolean}} options */ + decoders['Shift_JIS'] = function(options) { + return new ShiftJISDecoder(options); + }; + + // + // 14. Legacy multi-byte Korean encodings + // + + // 14.1 euc-kr + + // 14.1.1 euc-kr decoder + /** + * @constructor + * @implements {Decoder} + * @param {{fatal: boolean}} options + */ + function EUCKRDecoder(options) { + var fatal = options.fatal; + + // euc-kr's decoder has an associated euc-kr lead (initially 0x00). + var /** @type {number} */ euckr_lead = 0x00; + /** + * @param {Stream} stream The stream of bytes being decoded. + * @param {number} bite The next byte read from the stream. + * @return {?(number|!Array.)} The next code point(s) + * decoded, or null if not enough data exists in the input + * stream to decode a complete code point. + */ + this.handler = function(stream, bite) { + // 1. If byte is end-of-stream and euc-kr lead is not 0x00, set + // euc-kr lead to 0x00 and return error. + if (bite === end_of_stream && euckr_lead !== 0) { + euckr_lead = 0x00; + return decoderError(fatal); + } + + // 2. If byte is end-of-stream and euc-kr lead is 0x00, return + // finished. + if (bite === end_of_stream && euckr_lead === 0) + return finished; + + // 3. If euc-kr lead is not 0x00, let lead be euc-kr lead, let + // pointer be null, set euc-kr lead to 0x00, and then run these + // substeps: + if (euckr_lead !== 0x00) { + var lead = euckr_lead; + var pointer = null; + euckr_lead = 0x00; + + // 1. If byte is in the range 0x41 to 0xFE, inclusive, set + // pointer to (lead − 0x81) × 190 + (byte − 0x41). + if (inRange(bite, 0x41, 0xFE)) + pointer = (lead - 0x81) * 190 + (bite - 0x41); + + // 2. Let code point be null, if pointer is null, and the + // index code point for pointer in index euc-kr otherwise. + var code_point = (pointer === null) + ? null : indexCodePointFor(pointer, index('euc-kr')); + + // 3. If code point is null and byte is an ASCII byte, prepend + // byte to stream. + if (pointer === null && isASCIIByte(bite)) + stream.prepend(bite); + + // 4. If code point is null, return error. + if (code_point === null) + return decoderError(fatal); + + // 5. Return a code point whose value is code point. + return code_point; + } + + // 4. If byte is an ASCII byte, return a code point whose value + // is byte. + if (isASCIIByte(bite)) + return bite; + + // 5. If byte is in the range 0x81 to 0xFE, inclusive, set + // euc-kr lead to byte and return continue. + if (inRange(bite, 0x81, 0xFE)) { + euckr_lead = bite; + return null; + } + + // 6. Return error. + return decoderError(fatal); + }; + } + + // 14.1.2 euc-kr encoder + /** + * @constructor + * @implements {Encoder} + * @param {{fatal: boolean}} options + */ + function EUCKREncoder(options) { + var fatal = options.fatal; + /** + * @param {Stream} stream Input stream. + * @param {number} code_point Next code point read from the stream. + * @return {(number|!Array.)} Byte(s) to emit. + */ + this.handler = function(stream, code_point) { + // 1. If code point is end-of-stream, return finished. + if (code_point === end_of_stream) + return finished; + + // 2. If code point is an ASCII code point, return a byte whose + // value is code point. + if (isASCIICodePoint(code_point)) + return code_point; + + // 3. Let pointer be the index pointer for code point in index + // euc-kr. + var pointer = indexPointerFor(code_point, index('euc-kr')); + + // 4. If pointer is null, return error with code point. + if (pointer === null) + return encoderError(code_point); + + // 5. Let lead be floor(pointer / 190) + 0x81. + var lead = floor(pointer / 190) + 0x81; + + // 6. Let trail be pointer % 190 + 0x41. + var trail = (pointer % 190) + 0x41; + + // 7. Return two bytes whose values are lead and trail. + return [lead, trail]; + }; + } + + /** @param {{fatal: boolean}} options */ + encoders['EUC-KR'] = function(options) { + return new EUCKREncoder(options); + }; + /** @param {{fatal: boolean}} options */ + decoders['EUC-KR'] = function(options) { + return new EUCKRDecoder(options); + }; + + + // + // 15. Legacy miscellaneous encodings + // + + // 15.1 replacement + + // Not needed - API throws RangeError + + // 15.2 Common infrastructure for utf-16be and utf-16le + + /** + * @param {number} code_unit + * @param {boolean} utf16be + * @return {!Array.} bytes + */ + function convertCodeUnitToBytes(code_unit, utf16be) { + // 1. Let byte1 be code unit >> 8. + var byte1 = code_unit >> 8; + + // 2. Let byte2 be code unit & 0x00FF. + var byte2 = code_unit & 0x00FF; + + // 3. Then return the bytes in order: + // utf-16be flag is set: byte1, then byte2. + if (utf16be) + return [byte1, byte2]; + // utf-16be flag is unset: byte2, then byte1. + return [byte2, byte1]; + } + + // 15.2.1 shared utf-16 decoder + /** + * @constructor + * @implements {Decoder} + * @param {boolean} utf16_be True if big-endian, false if little-endian. + * @param {{fatal: boolean}} options + */ + function UTF16Decoder(utf16_be, options) { + var fatal = options.fatal; + var /** @type {?number} */ utf16_lead_byte = null, + /** @type {?number} */ utf16_lead_surrogate = null; + /** + * @param {Stream} stream The stream of bytes being decoded. + * @param {number} bite The next byte read from the stream. + * @return {?(number|!Array.)} The next code point(s) + * decoded, or null if not enough data exists in the input + * stream to decode a complete code point. + */ + this.handler = function(stream, bite) { + // 1. If byte is end-of-stream and either utf-16 lead byte or + // utf-16 lead surrogate is not null, set utf-16 lead byte and + // utf-16 lead surrogate to null, and return error. + if (bite === end_of_stream && (utf16_lead_byte !== null || + utf16_lead_surrogate !== null)) { + return decoderError(fatal); + } + + // 2. If byte is end-of-stream and utf-16 lead byte and utf-16 + // lead surrogate are null, return finished. + if (bite === end_of_stream && utf16_lead_byte === null && + utf16_lead_surrogate === null) { + return finished; + } + + // 3. If utf-16 lead byte is null, set utf-16 lead byte to byte + // and return continue. + if (utf16_lead_byte === null) { + utf16_lead_byte = bite; + return null; + } + + // 4. Let code unit be the result of: + var code_unit; + if (utf16_be) { + // utf-16be decoder flag is set + // (utf-16 lead byte << 8) + byte. + code_unit = (utf16_lead_byte << 8) + bite; + } else { + // utf-16be decoder flag is unset + // (byte << 8) + utf-16 lead byte. + code_unit = (bite << 8) + utf16_lead_byte; + } + // Then set utf-16 lead byte to null. + utf16_lead_byte = null; + + // 5. If utf-16 lead surrogate is not null, let lead surrogate + // be utf-16 lead surrogate, set utf-16 lead surrogate to null, + // and then run these substeps: + if (utf16_lead_surrogate !== null) { + var lead_surrogate = utf16_lead_surrogate; + utf16_lead_surrogate = null; + + // 1. If code unit is in the range U+DC00 to U+DFFF, + // inclusive, return a code point whose value is 0x10000 + + // ((lead surrogate − 0xD800) << 10) + (code unit − 0xDC00). + if (inRange(code_unit, 0xDC00, 0xDFFF)) { + return 0x10000 + (lead_surrogate - 0xD800) * 0x400 + + (code_unit - 0xDC00); + } + + // 2. Prepend the sequence resulting of converting code unit + // to bytes using utf-16be decoder flag to stream and return + // error. + stream.prepend(convertCodeUnitToBytes(code_unit, utf16_be)); + return decoderError(fatal); + } + + // 6. If code unit is in the range U+D800 to U+DBFF, inclusive, + // set utf-16 lead surrogate to code unit and return continue. + if (inRange(code_unit, 0xD800, 0xDBFF)) { + utf16_lead_surrogate = code_unit; + return null; + } + + // 7. If code unit is in the range U+DC00 to U+DFFF, inclusive, + // return error. + if (inRange(code_unit, 0xDC00, 0xDFFF)) + return decoderError(fatal); + + // 8. Return code point code unit. + return code_unit; + }; + } + + // 15.2.2 shared utf-16 encoder + /** + * @constructor + * @implements {Encoder} + * @param {boolean} utf16_be True if big-endian, false if little-endian. + * @param {{fatal: boolean}} options + */ + function UTF16Encoder(utf16_be, options) { + var fatal = options.fatal; + /** + * @param {Stream} stream Input stream. + * @param {number} code_point Next code point read from the stream. + * @return {(number|!Array.)} Byte(s) to emit. + */ + this.handler = function(stream, code_point) { + // 1. If code point is end-of-stream, return finished. + if (code_point === end_of_stream) + return finished; + + // 2. If code point is in the range U+0000 to U+FFFF, inclusive, + // return the sequence resulting of converting code point to + // bytes using utf-16be encoder flag. + if (inRange(code_point, 0x0000, 0xFFFF)) + return convertCodeUnitToBytes(code_point, utf16_be); + + // 3. Let lead be ((code point − 0x10000) >> 10) + 0xD800, + // converted to bytes using utf-16be encoder flag. + var lead = convertCodeUnitToBytes( + ((code_point - 0x10000) >> 10) + 0xD800, utf16_be); + + // 4. Let trail be ((code point − 0x10000) & 0x3FF) + 0xDC00, + // converted to bytes using utf-16be encoder flag. + var trail = convertCodeUnitToBytes( + ((code_point - 0x10000) & 0x3FF) + 0xDC00, utf16_be); + + // 5. Return a byte sequence of lead followed by trail. + return lead.concat(trail); + }; + } + + // 15.3 utf-16be + // 15.3.1 utf-16be decoder + /** @param {{fatal: boolean}} options */ + encoders['UTF-16BE'] = function(options) { + return new UTF16Encoder(true, options); + }; + // 15.3.2 utf-16be encoder + /** @param {{fatal: boolean}} options */ + decoders['UTF-16BE'] = function(options) { + return new UTF16Decoder(true, options); + }; + + // 15.4 utf-16le + // 15.4.1 utf-16le decoder + /** @param {{fatal: boolean}} options */ + encoders['UTF-16LE'] = function(options) { + return new UTF16Encoder(false, options); + }; + // 15.4.2 utf-16le encoder + /** @param {{fatal: boolean}} options */ + decoders['UTF-16LE'] = function(options) { + return new UTF16Decoder(false, options); + }; + + // 15.5 x-user-defined + + // 15.5.1 x-user-defined decoder + /** + * @constructor + * @implements {Decoder} + * @param {{fatal: boolean}} options + */ + function XUserDefinedDecoder(options) { + var fatal = options.fatal; + /** + * @param {Stream} stream The stream of bytes being decoded. + * @param {number} bite The next byte read from the stream. + * @return {?(number|!Array.)} The next code point(s) + * decoded, or null if not enough data exists in the input + * stream to decode a complete code point. + */ + this.handler = function(stream, bite) { + // 1. If byte is end-of-stream, return finished. + if (bite === end_of_stream) + return finished; + + // 2. If byte is an ASCII byte, return a code point whose value + // is byte. + if (isASCIIByte(bite)) + return bite; + + // 3. Return a code point whose value is 0xF780 + byte − 0x80. + return 0xF780 + bite - 0x80; + }; + } + + // 15.5.2 x-user-defined encoder + /** + * @constructor + * @implements {Encoder} + * @param {{fatal: boolean}} options + */ + function XUserDefinedEncoder(options) { + var fatal = options.fatal; + /** + * @param {Stream} stream Input stream. + * @param {number} code_point Next code point read from the stream. + * @return {(number|!Array.)} Byte(s) to emit. + */ + this.handler = function(stream, code_point) { + // 1.If code point is end-of-stream, return finished. + if (code_point === end_of_stream) + return finished; + + // 2. If code point is an ASCII code point, return a byte whose + // value is code point. + if (isASCIICodePoint(code_point)) + return code_point; + + // 3. If code point is in the range U+F780 to U+F7FF, inclusive, + // return a byte whose value is code point − 0xF780 + 0x80. + if (inRange(code_point, 0xF780, 0xF7FF)) + return code_point - 0xF780 + 0x80; + + // 4. Return error with code point. + return encoderError(code_point); + }; + } + + /** @param {{fatal: boolean}} options */ + encoders['x-user-defined'] = function(options) { + return new XUserDefinedEncoder(options); + }; + /** @param {{fatal: boolean}} options */ + decoders['x-user-defined'] = function(options) { + return new XUserDefinedDecoder(options); + }; + + if (!global['TextEncoder']) + global['TextEncoder'] = TextEncoder; + if (!global['TextDecoder']) + global['TextDecoder'] = TextDecoder; + + if (typeof module !== "undefined" && module.exports) { + module.exports = { + TextEncoder: global['TextEncoder'], + TextDecoder: global['TextDecoder'], + EncodingIndexes: global["encoding-indexes"] + }; + } + +// For strict environments where `this` inside the global scope +// is `undefined`, take a pure object instead +}(this || {})); +},{"./encoding-indexes.js":67}],69:[function(require,module,exports){ +/*! + + diff v3.5.0 + +Software License Agreement (BSD License) + +Copyright (c) 2009-2015, Kevin Decker + +All rights reserved. + +Redistribution and use of this software in source and binary forms, with or without modification, +are permitted provided that the following conditions are met: + +* Redistributions of source code must retain the above + copyright notice, this list of conditions and the + following disclaimer. + +* Redistributions in binary form must reproduce the above + copyright notice, this list of conditions and the + following disclaimer in the documentation and/or other + materials provided with the distribution. + +* Neither the name of Kevin Decker nor the names of its + contributors may be used to endorse or promote products + derived from this software without specific prior + written permission. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR +IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND +FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR +CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL +DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER +IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT +OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +@license +*/ +(function webpackUniversalModuleDefinition(root, factory) { + if(typeof exports === 'object' && typeof module === 'object') + module.exports = factory(); + else if(typeof define === 'function' && define.amd) + define([], factory); + else if(typeof exports === 'object') + exports["JsDiff"] = factory(); + else + root["JsDiff"] = factory(); +})(this, function() { +return /******/ (function(modules) { // webpackBootstrap +/******/ // The module cache +/******/ var installedModules = {}; + +/******/ // The require function +/******/ function __webpack_require__(moduleId) { + +/******/ // Check if module is in cache +/******/ if(installedModules[moduleId]) +/******/ return installedModules[moduleId].exports; + +/******/ // Create a new module (and put it into the cache) +/******/ var module = installedModules[moduleId] = { +/******/ exports: {}, +/******/ id: moduleId, +/******/ loaded: false +/******/ }; + +/******/ // Execute the module function +/******/ modules[moduleId].call(module.exports, module, module.exports, __webpack_require__); + +/******/ // Flag the module as loaded +/******/ module.loaded = true; + +/******/ // Return the exports of the module +/******/ return module.exports; +/******/ } + + +/******/ // expose the modules object (__webpack_modules__) +/******/ __webpack_require__.m = modules; + +/******/ // expose the module cache +/******/ __webpack_require__.c = installedModules; + +/******/ // __webpack_public_path__ +/******/ __webpack_require__.p = ""; + +/******/ // Load entry module and return exports +/******/ return __webpack_require__(0); +/******/ }) +/************************************************************************/ +/******/ ([ +/* 0 */ +/***/ (function(module, exports, __webpack_require__) { + + /*istanbul ignore start*/'use strict'; + + exports.__esModule = true; + exports.canonicalize = exports.convertChangesToXML = exports.convertChangesToDMP = exports.merge = exports.parsePatch = exports.applyPatches = exports.applyPatch = exports.createPatch = exports.createTwoFilesPatch = exports.structuredPatch = exports.diffArrays = exports.diffJson = exports.diffCss = exports.diffSentences = exports.diffTrimmedLines = exports.diffLines = exports.diffWordsWithSpace = exports.diffWords = exports.diffChars = exports.Diff = undefined; + + /*istanbul ignore end*/var /*istanbul ignore start*/_base = __webpack_require__(1) /*istanbul ignore end*/; + + /*istanbul ignore start*/var _base2 = _interopRequireDefault(_base); + + /*istanbul ignore end*/var /*istanbul ignore start*/_character = __webpack_require__(2) /*istanbul ignore end*/; + + var /*istanbul ignore start*/_word = __webpack_require__(3) /*istanbul ignore end*/; + + var /*istanbul ignore start*/_line = __webpack_require__(5) /*istanbul ignore end*/; + + var /*istanbul ignore start*/_sentence = __webpack_require__(6) /*istanbul ignore end*/; + + var /*istanbul ignore start*/_css = __webpack_require__(7) /*istanbul ignore end*/; + + var /*istanbul ignore start*/_json = __webpack_require__(8) /*istanbul ignore end*/; + + var /*istanbul ignore start*/_array = __webpack_require__(9) /*istanbul ignore end*/; + + var /*istanbul ignore start*/_apply = __webpack_require__(10) /*istanbul ignore end*/; + + var /*istanbul ignore start*/_parse = __webpack_require__(11) /*istanbul ignore end*/; + + var /*istanbul ignore start*/_merge = __webpack_require__(13) /*istanbul ignore end*/; + + var /*istanbul ignore start*/_create = __webpack_require__(14) /*istanbul ignore end*/; + + var /*istanbul ignore start*/_dmp = __webpack_require__(16) /*istanbul ignore end*/; + + var /*istanbul ignore start*/_xml = __webpack_require__(17) /*istanbul ignore end*/; + + /*istanbul ignore start*/function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; } + + /* See LICENSE file for terms of use */ + + /* + * Text diff implementation. + * + * This library supports the following APIS: + * JsDiff.diffChars: Character by character diff + * JsDiff.diffWords: Word (as defined by \b regex) diff which ignores whitespace + * JsDiff.diffLines: Line based diff + * + * JsDiff.diffCss: Diff targeted at CSS content + * + * These methods are based on the implementation proposed in + * "An O(ND) Difference Algorithm and its Variations" (Myers, 1986). + * http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.4.6927 + */ + exports. /*istanbul ignore end*/Diff = _base2['default']; + /*istanbul ignore start*/exports. /*istanbul ignore end*/diffChars = _character.diffChars; + /*istanbul ignore start*/exports. /*istanbul ignore end*/diffWords = _word.diffWords; + /*istanbul ignore start*/exports. /*istanbul ignore end*/diffWordsWithSpace = _word.diffWordsWithSpace; + /*istanbul ignore start*/exports. /*istanbul ignore end*/diffLines = _line.diffLines; + /*istanbul ignore start*/exports. /*istanbul ignore end*/diffTrimmedLines = _line.diffTrimmedLines; + /*istanbul ignore start*/exports. /*istanbul ignore end*/diffSentences = _sentence.diffSentences; + /*istanbul ignore start*/exports. /*istanbul ignore end*/diffCss = _css.diffCss; + /*istanbul ignore start*/exports. /*istanbul ignore end*/diffJson = _json.diffJson; + /*istanbul ignore start*/exports. /*istanbul ignore end*/diffArrays = _array.diffArrays; + /*istanbul ignore start*/exports. /*istanbul ignore end*/structuredPatch = _create.structuredPatch; + /*istanbul ignore start*/exports. /*istanbul ignore end*/createTwoFilesPatch = _create.createTwoFilesPatch; + /*istanbul ignore start*/exports. /*istanbul ignore end*/createPatch = _create.createPatch; + /*istanbul ignore start*/exports. /*istanbul ignore end*/applyPatch = _apply.applyPatch; + /*istanbul ignore start*/exports. /*istanbul ignore end*/applyPatches = _apply.applyPatches; + /*istanbul ignore start*/exports. /*istanbul ignore end*/parsePatch = _parse.parsePatch; + /*istanbul ignore start*/exports. /*istanbul ignore end*/merge = _merge.merge; + /*istanbul ignore start*/exports. /*istanbul ignore end*/convertChangesToDMP = _dmp.convertChangesToDMP; + /*istanbul ignore start*/exports. /*istanbul ignore end*/convertChangesToXML = _xml.convertChangesToXML; + /*istanbul ignore start*/exports. /*istanbul ignore end*/canonicalize = _json.canonicalize; + + + +/***/ }), +/* 1 */ +/***/ (function(module, exports) { + + /*istanbul ignore start*/'use strict'; + + exports.__esModule = true; + exports['default'] = /*istanbul ignore end*/Diff; + function Diff() {} + + Diff.prototype = { + /*istanbul ignore start*/ /*istanbul ignore end*/diff: function diff(oldString, newString) { + /*istanbul ignore start*/var /*istanbul ignore end*/options = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {}; + + var callback = options.callback; + if (typeof options === 'function') { + callback = options; + options = {}; + } + this.options = options; + + var self = this; + + function done(value) { + if (callback) { + setTimeout(function () { + callback(undefined, value); + }, 0); + return true; + } else { + return value; + } + } + + // Allow subclasses to massage the input prior to running + oldString = this.castInput(oldString); + newString = this.castInput(newString); + + oldString = this.removeEmpty(this.tokenize(oldString)); + newString = this.removeEmpty(this.tokenize(newString)); + + var newLen = newString.length, + oldLen = oldString.length; + var editLength = 1; + var maxEditLength = newLen + oldLen; + var bestPath = [{ newPos: -1, components: [] }]; + + // Seed editLength = 0, i.e. the content starts with the same values + var oldPos = this.extractCommon(bestPath[0], newString, oldString, 0); + if (bestPath[0].newPos + 1 >= newLen && oldPos + 1 >= oldLen) { + // Identity per the equality and tokenizer + return done([{ value: this.join(newString), count: newString.length }]); + } + + // Main worker method. checks all permutations of a given edit length for acceptance. + function execEditLength() { + for (var diagonalPath = -1 * editLength; diagonalPath <= editLength; diagonalPath += 2) { + var basePath = /*istanbul ignore start*/void 0 /*istanbul ignore end*/; + var addPath = bestPath[diagonalPath - 1], + removePath = bestPath[diagonalPath + 1], + _oldPos = (removePath ? removePath.newPos : 0) - diagonalPath; + if (addPath) { + // No one else is going to attempt to use this value, clear it + bestPath[diagonalPath - 1] = undefined; + } + + var canAdd = addPath && addPath.newPos + 1 < newLen, + canRemove = removePath && 0 <= _oldPos && _oldPos < oldLen; + if (!canAdd && !canRemove) { + // If this path is a terminal then prune + bestPath[diagonalPath] = undefined; + continue; + } + + // Select the diagonal that we want to branch from. We select the prior + // path whose position in the new string is the farthest from the origin + // and does not pass the bounds of the diff graph + if (!canAdd || canRemove && addPath.newPos < removePath.newPos) { + basePath = clonePath(removePath); + self.pushComponent(basePath.components, undefined, true); + } else { + basePath = addPath; // No need to clone, we've pulled it from the list + basePath.newPos++; + self.pushComponent(basePath.components, true, undefined); + } + + _oldPos = self.extractCommon(basePath, newString, oldString, diagonalPath); + + // If we have hit the end of both strings, then we are done + if (basePath.newPos + 1 >= newLen && _oldPos + 1 >= oldLen) { + return done(buildValues(self, basePath.components, newString, oldString, self.useLongestToken)); + } else { + // Otherwise track this path as a potential candidate and continue. + bestPath[diagonalPath] = basePath; + } + } + + editLength++; + } + + // Performs the length of edit iteration. Is a bit fugly as this has to support the + // sync and async mode which is never fun. Loops over execEditLength until a value + // is produced. + if (callback) { + (function exec() { + setTimeout(function () { + // This should not happen, but we want to be safe. + /* istanbul ignore next */ + if (editLength > maxEditLength) { + return callback(); + } + + if (!execEditLength()) { + exec(); + } + }, 0); + })(); + } else { + while (editLength <= maxEditLength) { + var ret = execEditLength(); + if (ret) { + return ret; + } + } + } + }, + /*istanbul ignore start*/ /*istanbul ignore end*/pushComponent: function pushComponent(components, added, removed) { + var last = components[components.length - 1]; + if (last && last.added === added && last.removed === removed) { + // We need to clone here as the component clone operation is just + // as shallow array clone + components[components.length - 1] = { count: last.count + 1, added: added, removed: removed }; + } else { + components.push({ count: 1, added: added, removed: removed }); + } + }, + /*istanbul ignore start*/ /*istanbul ignore end*/extractCommon: function extractCommon(basePath, newString, oldString, diagonalPath) { + var newLen = newString.length, + oldLen = oldString.length, + newPos = basePath.newPos, + oldPos = newPos - diagonalPath, + commonCount = 0; + while (newPos + 1 < newLen && oldPos + 1 < oldLen && this.equals(newString[newPos + 1], oldString[oldPos + 1])) { + newPos++; + oldPos++; + commonCount++; + } + + if (commonCount) { + basePath.components.push({ count: commonCount }); + } + + basePath.newPos = newPos; + return oldPos; + }, + /*istanbul ignore start*/ /*istanbul ignore end*/equals: function equals(left, right) { + if (this.options.comparator) { + return this.options.comparator(left, right); + } else { + return left === right || this.options.ignoreCase && left.toLowerCase() === right.toLowerCase(); + } + }, + /*istanbul ignore start*/ /*istanbul ignore end*/removeEmpty: function removeEmpty(array) { + var ret = []; + for (var i = 0; i < array.length; i++) { + if (array[i]) { + ret.push(array[i]); + } + } + return ret; + }, + /*istanbul ignore start*/ /*istanbul ignore end*/castInput: function castInput(value) { + return value; + }, + /*istanbul ignore start*/ /*istanbul ignore end*/tokenize: function tokenize(value) { + return value.split(''); + }, + /*istanbul ignore start*/ /*istanbul ignore end*/join: function join(chars) { + return chars.join(''); + } + }; + + function buildValues(diff, components, newString, oldString, useLongestToken) { + var componentPos = 0, + componentLen = components.length, + newPos = 0, + oldPos = 0; + + for (; componentPos < componentLen; componentPos++) { + var component = components[componentPos]; + if (!component.removed) { + if (!component.added && useLongestToken) { + var value = newString.slice(newPos, newPos + component.count); + value = value.map(function (value, i) { + var oldValue = oldString[oldPos + i]; + return oldValue.length > value.length ? oldValue : value; + }); + + component.value = diff.join(value); + } else { + component.value = diff.join(newString.slice(newPos, newPos + component.count)); + } + newPos += component.count; + + // Common case + if (!component.added) { + oldPos += component.count; + } + } else { + component.value = diff.join(oldString.slice(oldPos, oldPos + component.count)); + oldPos += component.count; + + // Reverse add and remove so removes are output first to match common convention + // The diffing algorithm is tied to add then remove output and this is the simplest + // route to get the desired output with minimal overhead. + if (componentPos && components[componentPos - 1].added) { + var tmp = components[componentPos - 1]; + components[componentPos - 1] = components[componentPos]; + components[componentPos] = tmp; + } + } + } + + // Special case handle for when one terminal is ignored (i.e. whitespace). + // For this case we merge the terminal into the prior string and drop the change. + // This is only available for string mode. + var lastComponent = components[componentLen - 1]; + if (componentLen > 1 && typeof lastComponent.value === 'string' && (lastComponent.added || lastComponent.removed) && diff.equals('', lastComponent.value)) { + components[componentLen - 2].value += lastComponent.value; + components.pop(); + } + + return components; + } + + function clonePath(path) { + return { newPos: path.newPos, components: path.components.slice(0) }; + } + + + +/***/ }), +/* 2 */ +/***/ (function(module, exports, __webpack_require__) { + + /*istanbul ignore start*/'use strict'; + + exports.__esModule = true; + exports.characterDiff = undefined; + exports. /*istanbul ignore end*/diffChars = diffChars; + + var /*istanbul ignore start*/_base = __webpack_require__(1) /*istanbul ignore end*/; + + /*istanbul ignore start*/var _base2 = _interopRequireDefault(_base); + + function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; } + + /*istanbul ignore end*/var characterDiff = /*istanbul ignore start*/exports. /*istanbul ignore end*/characterDiff = new /*istanbul ignore start*/_base2['default'] /*istanbul ignore end*/(); + function diffChars(oldStr, newStr, options) { + return characterDiff.diff(oldStr, newStr, options); + } + + + +/***/ }), +/* 3 */ +/***/ (function(module, exports, __webpack_require__) { + + /*istanbul ignore start*/'use strict'; + + exports.__esModule = true; + exports.wordDiff = undefined; + exports. /*istanbul ignore end*/diffWords = diffWords; + /*istanbul ignore start*/exports. /*istanbul ignore end*/diffWordsWithSpace = diffWordsWithSpace; + + var /*istanbul ignore start*/_base = __webpack_require__(1) /*istanbul ignore end*/; + + /*istanbul ignore start*/var _base2 = _interopRequireDefault(_base); + + /*istanbul ignore end*/var /*istanbul ignore start*/_params = __webpack_require__(4) /*istanbul ignore end*/; + + /*istanbul ignore start*/function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; } + + /*istanbul ignore end*/ // Based on https://en.wikipedia.org/wiki/Latin_script_in_Unicode + // + // Ranges and exceptions: + // Latin-1 Supplement, 0080–00FF + // - U+00D7 × Multiplication sign + // - U+00F7 ÷ Division sign + // Latin Extended-A, 0100–017F + // Latin Extended-B, 0180–024F + // IPA Extensions, 0250–02AF + // Spacing Modifier Letters, 02B0–02FF + // - U+02C7 ˇ ˇ Caron + // - U+02D8 ˘ ˘ Breve + // - U+02D9 ˙ ˙ Dot Above + // - U+02DA ˚ ˚ Ring Above + // - U+02DB ˛ ˛ Ogonek + // - U+02DC ˜ ˜ Small Tilde + // - U+02DD ˝ ˝ Double Acute Accent + // Latin Extended Additional, 1E00–1EFF + var extendedWordChars = /^[A-Za-z\xC0-\u02C6\u02C8-\u02D7\u02DE-\u02FF\u1E00-\u1EFF]+$/; + + var reWhitespace = /\S/; + + var wordDiff = /*istanbul ignore start*/exports. /*istanbul ignore end*/wordDiff = new /*istanbul ignore start*/_base2['default'] /*istanbul ignore end*/(); + wordDiff.equals = function (left, right) { + if (this.options.ignoreCase) { + left = left.toLowerCase(); + right = right.toLowerCase(); + } + return left === right || this.options.ignoreWhitespace && !reWhitespace.test(left) && !reWhitespace.test(right); + }; + wordDiff.tokenize = function (value) { + var tokens = value.split(/(\s+|\b)/); + + // Join the boundary splits that we do not consider to be boundaries. This is primarily the extended Latin character set. + for (var i = 0; i < tokens.length - 1; i++) { + // If we have an empty string in the next field and we have only word chars before and after, merge + if (!tokens[i + 1] && tokens[i + 2] && extendedWordChars.test(tokens[i]) && extendedWordChars.test(tokens[i + 2])) { + tokens[i] += tokens[i + 2]; + tokens.splice(i + 1, 2); + i--; + } + } + + return tokens; + }; + + function diffWords(oldStr, newStr, options) { + options = /*istanbul ignore start*/(0, _params.generateOptions) /*istanbul ignore end*/(options, { ignoreWhitespace: true }); + return wordDiff.diff(oldStr, newStr, options); + } + + function diffWordsWithSpace(oldStr, newStr, options) { + return wordDiff.diff(oldStr, newStr, options); + } + + + +/***/ }), +/* 4 */ +/***/ (function(module, exports) { + + /*istanbul ignore start*/'use strict'; + + exports.__esModule = true; + exports. /*istanbul ignore end*/generateOptions = generateOptions; + function generateOptions(options, defaults) { + if (typeof options === 'function') { + defaults.callback = options; + } else if (options) { + for (var name in options) { + /* istanbul ignore else */ + if (options.hasOwnProperty(name)) { + defaults[name] = options[name]; + } + } + } + return defaults; + } + + + +/***/ }), +/* 5 */ +/***/ (function(module, exports, __webpack_require__) { + + /*istanbul ignore start*/'use strict'; + + exports.__esModule = true; + exports.lineDiff = undefined; + exports. /*istanbul ignore end*/diffLines = diffLines; + /*istanbul ignore start*/exports. /*istanbul ignore end*/diffTrimmedLines = diffTrimmedLines; + + var /*istanbul ignore start*/_base = __webpack_require__(1) /*istanbul ignore end*/; + + /*istanbul ignore start*/var _base2 = _interopRequireDefault(_base); + + /*istanbul ignore end*/var /*istanbul ignore start*/_params = __webpack_require__(4) /*istanbul ignore end*/; + + /*istanbul ignore start*/function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; } + + /*istanbul ignore end*/var lineDiff = /*istanbul ignore start*/exports. /*istanbul ignore end*/lineDiff = new /*istanbul ignore start*/_base2['default'] /*istanbul ignore end*/(); + lineDiff.tokenize = function (value) { + var retLines = [], + linesAndNewlines = value.split(/(\n|\r\n)/); + + // Ignore the final empty token that occurs if the string ends with a new line + if (!linesAndNewlines[linesAndNewlines.length - 1]) { + linesAndNewlines.pop(); + } + + // Merge the content and line separators into single tokens + for (var i = 0; i < linesAndNewlines.length; i++) { + var line = linesAndNewlines[i]; + + if (i % 2 && !this.options.newlineIsToken) { + retLines[retLines.length - 1] += line; + } else { + if (this.options.ignoreWhitespace) { + line = line.trim(); + } + retLines.push(line); + } + } + + return retLines; + }; + + function diffLines(oldStr, newStr, callback) { + return lineDiff.diff(oldStr, newStr, callback); + } + function diffTrimmedLines(oldStr, newStr, callback) { + var options = /*istanbul ignore start*/(0, _params.generateOptions) /*istanbul ignore end*/(callback, { ignoreWhitespace: true }); + return lineDiff.diff(oldStr, newStr, options); + } + + + +/***/ }), +/* 6 */ +/***/ (function(module, exports, __webpack_require__) { + + /*istanbul ignore start*/'use strict'; + + exports.__esModule = true; + exports.sentenceDiff = undefined; + exports. /*istanbul ignore end*/diffSentences = diffSentences; + + var /*istanbul ignore start*/_base = __webpack_require__(1) /*istanbul ignore end*/; + + /*istanbul ignore start*/var _base2 = _interopRequireDefault(_base); + + function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; } + + /*istanbul ignore end*/var sentenceDiff = /*istanbul ignore start*/exports. /*istanbul ignore end*/sentenceDiff = new /*istanbul ignore start*/_base2['default'] /*istanbul ignore end*/(); + sentenceDiff.tokenize = function (value) { + return value.split(/(\S.+?[.!?])(?=\s+|$)/); + }; + + function diffSentences(oldStr, newStr, callback) { + return sentenceDiff.diff(oldStr, newStr, callback); + } + + + +/***/ }), +/* 7 */ +/***/ (function(module, exports, __webpack_require__) { + + /*istanbul ignore start*/'use strict'; + + exports.__esModule = true; + exports.cssDiff = undefined; + exports. /*istanbul ignore end*/diffCss = diffCss; + + var /*istanbul ignore start*/_base = __webpack_require__(1) /*istanbul ignore end*/; + + /*istanbul ignore start*/var _base2 = _interopRequireDefault(_base); + + function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; } + + /*istanbul ignore end*/var cssDiff = /*istanbul ignore start*/exports. /*istanbul ignore end*/cssDiff = new /*istanbul ignore start*/_base2['default'] /*istanbul ignore end*/(); + cssDiff.tokenize = function (value) { + return value.split(/([{}:;,]|\s+)/); + }; + + function diffCss(oldStr, newStr, callback) { + return cssDiff.diff(oldStr, newStr, callback); + } + + + +/***/ }), +/* 8 */ +/***/ (function(module, exports, __webpack_require__) { + + /*istanbul ignore start*/'use strict'; + + exports.__esModule = true; + exports.jsonDiff = undefined; + + var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; + + exports. /*istanbul ignore end*/diffJson = diffJson; + /*istanbul ignore start*/exports. /*istanbul ignore end*/canonicalize = canonicalize; + + var /*istanbul ignore start*/_base = __webpack_require__(1) /*istanbul ignore end*/; + + /*istanbul ignore start*/var _base2 = _interopRequireDefault(_base); + + /*istanbul ignore end*/var /*istanbul ignore start*/_line = __webpack_require__(5) /*istanbul ignore end*/; + + /*istanbul ignore start*/function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; } + + /*istanbul ignore end*/var objectPrototypeToString = Object.prototype.toString; + + var jsonDiff = /*istanbul ignore start*/exports. /*istanbul ignore end*/jsonDiff = new /*istanbul ignore start*/_base2['default'] /*istanbul ignore end*/(); + // Discriminate between two lines of pretty-printed, serialized JSON where one of them has a + // dangling comma and the other doesn't. Turns out including the dangling comma yields the nicest output: + jsonDiff.useLongestToken = true; + + jsonDiff.tokenize = /*istanbul ignore start*/_line.lineDiff /*istanbul ignore end*/.tokenize; + jsonDiff.castInput = function (value) { + /*istanbul ignore start*/var _options = /*istanbul ignore end*/this.options, + undefinedReplacement = _options.undefinedReplacement, + _options$stringifyRep = _options.stringifyReplacer, + stringifyReplacer = _options$stringifyRep === undefined ? function (k, v) /*istanbul ignore start*/{ + return (/*istanbul ignore end*/typeof v === 'undefined' ? undefinedReplacement : v + ); + } : _options$stringifyRep; + + + return typeof value === 'string' ? value : JSON.stringify(canonicalize(value, null, null, stringifyReplacer), stringifyReplacer, ' '); + }; + jsonDiff.equals = function (left, right) { + return (/*istanbul ignore start*/_base2['default'] /*istanbul ignore end*/.prototype.equals.call(jsonDiff, left.replace(/,([\r\n])/g, '$1'), right.replace(/,([\r\n])/g, '$1')) + ); + }; + + function diffJson(oldObj, newObj, options) { + return jsonDiff.diff(oldObj, newObj, options); + } + + // This function handles the presence of circular references by bailing out when encountering an + // object that is already on the "stack" of items being processed. Accepts an optional replacer + function canonicalize(obj, stack, replacementStack, replacer, key) { + stack = stack || []; + replacementStack = replacementStack || []; + + if (replacer) { + obj = replacer(key, obj); + } + + var i = /*istanbul ignore start*/void 0 /*istanbul ignore end*/; + + for (i = 0; i < stack.length; i += 1) { + if (stack[i] === obj) { + return replacementStack[i]; + } + } + + var canonicalizedObj = /*istanbul ignore start*/void 0 /*istanbul ignore end*/; + + if ('[object Array]' === objectPrototypeToString.call(obj)) { + stack.push(obj); + canonicalizedObj = new Array(obj.length); + replacementStack.push(canonicalizedObj); + for (i = 0; i < obj.length; i += 1) { + canonicalizedObj[i] = canonicalize(obj[i], stack, replacementStack, replacer, key); + } + stack.pop(); + replacementStack.pop(); + return canonicalizedObj; + } + + if (obj && obj.toJSON) { + obj = obj.toJSON(); + } + + if ( /*istanbul ignore start*/(typeof /*istanbul ignore end*/obj === 'undefined' ? 'undefined' : _typeof(obj)) === 'object' && obj !== null) { + stack.push(obj); + canonicalizedObj = {}; + replacementStack.push(canonicalizedObj); + var sortedKeys = [], + _key = /*istanbul ignore start*/void 0 /*istanbul ignore end*/; + for (_key in obj) { + /* istanbul ignore else */ + if (obj.hasOwnProperty(_key)) { + sortedKeys.push(_key); + } + } + sortedKeys.sort(); + for (i = 0; i < sortedKeys.length; i += 1) { + _key = sortedKeys[i]; + canonicalizedObj[_key] = canonicalize(obj[_key], stack, replacementStack, replacer, _key); + } + stack.pop(); + replacementStack.pop(); + } else { + canonicalizedObj = obj; + } + return canonicalizedObj; + } + + + +/***/ }), +/* 9 */ +/***/ (function(module, exports, __webpack_require__) { + + /*istanbul ignore start*/'use strict'; + + exports.__esModule = true; + exports.arrayDiff = undefined; + exports. /*istanbul ignore end*/diffArrays = diffArrays; + + var /*istanbul ignore start*/_base = __webpack_require__(1) /*istanbul ignore end*/; + + /*istanbul ignore start*/var _base2 = _interopRequireDefault(_base); + + function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; } + + /*istanbul ignore end*/var arrayDiff = /*istanbul ignore start*/exports. /*istanbul ignore end*/arrayDiff = new /*istanbul ignore start*/_base2['default'] /*istanbul ignore end*/(); + arrayDiff.tokenize = function (value) { + return value.slice(); + }; + arrayDiff.join = arrayDiff.removeEmpty = function (value) { + return value; + }; + + function diffArrays(oldArr, newArr, callback) { + return arrayDiff.diff(oldArr, newArr, callback); + } + + + +/***/ }), +/* 10 */ +/***/ (function(module, exports, __webpack_require__) { + + /*istanbul ignore start*/'use strict'; + + exports.__esModule = true; + exports. /*istanbul ignore end*/applyPatch = applyPatch; + /*istanbul ignore start*/exports. /*istanbul ignore end*/applyPatches = applyPatches; + + var /*istanbul ignore start*/_parse = __webpack_require__(11) /*istanbul ignore end*/; + + var /*istanbul ignore start*/_distanceIterator = __webpack_require__(12) /*istanbul ignore end*/; + + /*istanbul ignore start*/var _distanceIterator2 = _interopRequireDefault(_distanceIterator); + + function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; } + + /*istanbul ignore end*/function applyPatch(source, uniDiff) { + /*istanbul ignore start*/var /*istanbul ignore end*/options = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {}; + + if (typeof uniDiff === 'string') { + uniDiff = /*istanbul ignore start*/(0, _parse.parsePatch) /*istanbul ignore end*/(uniDiff); + } + + if (Array.isArray(uniDiff)) { + if (uniDiff.length > 1) { + throw new Error('applyPatch only works with a single input.'); + } + + uniDiff = uniDiff[0]; + } + + // Apply the diff to the input + var lines = source.split(/\r\n|[\n\v\f\r\x85]/), + delimiters = source.match(/\r\n|[\n\v\f\r\x85]/g) || [], + hunks = uniDiff.hunks, + compareLine = options.compareLine || function (lineNumber, line, operation, patchContent) /*istanbul ignore start*/{ + return (/*istanbul ignore end*/line === patchContent + ); + }, + errorCount = 0, + fuzzFactor = options.fuzzFactor || 0, + minLine = 0, + offset = 0, + removeEOFNL = /*istanbul ignore start*/void 0 /*istanbul ignore end*/, + addEOFNL = /*istanbul ignore start*/void 0 /*istanbul ignore end*/; + + /** + * Checks if the hunk exactly fits on the provided location + */ + function hunkFits(hunk, toPos) { + for (var j = 0; j < hunk.lines.length; j++) { + var line = hunk.lines[j], + operation = line.length > 0 ? line[0] : ' ', + content = line.length > 0 ? line.substr(1) : line; + + if (operation === ' ' || operation === '-') { + // Context sanity check + if (!compareLine(toPos + 1, lines[toPos], operation, content)) { + errorCount++; + + if (errorCount > fuzzFactor) { + return false; + } + } + toPos++; + } + } + + return true; + } + + // Search best fit offsets for each hunk based on the previous ones + for (var i = 0; i < hunks.length; i++) { + var hunk = hunks[i], + maxLine = lines.length - hunk.oldLines, + localOffset = 0, + toPos = offset + hunk.oldStart - 1; + + var iterator = /*istanbul ignore start*/(0, _distanceIterator2['default']) /*istanbul ignore end*/(toPos, minLine, maxLine); + + for (; localOffset !== undefined; localOffset = iterator()) { + if (hunkFits(hunk, toPos + localOffset)) { + hunk.offset = offset += localOffset; + break; + } + } + + if (localOffset === undefined) { + return false; + } + + // Set lower text limit to end of the current hunk, so next ones don't try + // to fit over already patched text + minLine = hunk.offset + hunk.oldStart + hunk.oldLines; + } + + // Apply patch hunks + var diffOffset = 0; + for (var _i = 0; _i < hunks.length; _i++) { + var _hunk = hunks[_i], + _toPos = _hunk.oldStart + _hunk.offset + diffOffset - 1; + diffOffset += _hunk.newLines - _hunk.oldLines; + + if (_toPos < 0) { + // Creating a new file + _toPos = 0; + } + + for (var j = 0; j < _hunk.lines.length; j++) { + var line = _hunk.lines[j], + operation = line.length > 0 ? line[0] : ' ', + content = line.length > 0 ? line.substr(1) : line, + delimiter = _hunk.linedelimiters[j]; + + if (operation === ' ') { + _toPos++; + } else if (operation === '-') { + lines.splice(_toPos, 1); + delimiters.splice(_toPos, 1); + /* istanbul ignore else */ + } else if (operation === '+') { + lines.splice(_toPos, 0, content); + delimiters.splice(_toPos, 0, delimiter); + _toPos++; + } else if (operation === '\\') { + var previousOperation = _hunk.lines[j - 1] ? _hunk.lines[j - 1][0] : null; + if (previousOperation === '+') { + removeEOFNL = true; + } else if (previousOperation === '-') { + addEOFNL = true; + } + } + } + } + + // Handle EOFNL insertion/removal + if (removeEOFNL) { + while (!lines[lines.length - 1]) { + lines.pop(); + delimiters.pop(); + } + } else if (addEOFNL) { + lines.push(''); + delimiters.push('\n'); + } + for (var _k = 0; _k < lines.length - 1; _k++) { + lines[_k] = lines[_k] + delimiters[_k]; + } + return lines.join(''); + } + + // Wrapper that supports multiple file patches via callbacks. + function applyPatches(uniDiff, options) { + if (typeof uniDiff === 'string') { + uniDiff = /*istanbul ignore start*/(0, _parse.parsePatch) /*istanbul ignore end*/(uniDiff); + } + + var currentIndex = 0; + function processIndex() { + var index = uniDiff[currentIndex++]; + if (!index) { + return options.complete(); + } + + options.loadFile(index, function (err, data) { + if (err) { + return options.complete(err); + } + + var updatedContent = applyPatch(data, index, options); + options.patched(index, updatedContent, function (err) { + if (err) { + return options.complete(err); + } + + processIndex(); + }); + }); + } + processIndex(); + } + + + +/***/ }), +/* 11 */ +/***/ (function(module, exports) { + + /*istanbul ignore start*/'use strict'; + + exports.__esModule = true; + exports. /*istanbul ignore end*/parsePatch = parsePatch; + function parsePatch(uniDiff) { + /*istanbul ignore start*/var /*istanbul ignore end*/options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {}; + + var diffstr = uniDiff.split(/\r\n|[\n\v\f\r\x85]/), + delimiters = uniDiff.match(/\r\n|[\n\v\f\r\x85]/g) || [], + list = [], + i = 0; + + function parseIndex() { + var index = {}; + list.push(index); + + // Parse diff metadata + while (i < diffstr.length) { + var line = diffstr[i]; + + // File header found, end parsing diff metadata + if (/^(\-\-\-|\+\+\+|@@)\s/.test(line)) { + break; + } + + // Diff index + var header = /^(?:Index:|diff(?: -r \w+)+)\s+(.+?)\s*$/.exec(line); + if (header) { + index.index = header[1]; + } + + i++; + } + + // Parse file headers if they are defined. Unified diff requires them, but + // there's no technical issues to have an isolated hunk without file header + parseFileHeader(index); + parseFileHeader(index); + + // Parse hunks + index.hunks = []; + + while (i < diffstr.length) { + var _line = diffstr[i]; + + if (/^(Index:|diff|\-\-\-|\+\+\+)\s/.test(_line)) { + break; + } else if (/^@@/.test(_line)) { + index.hunks.push(parseHunk()); + } else if (_line && options.strict) { + // Ignore unexpected content unless in strict mode + throw new Error('Unknown line ' + (i + 1) + ' ' + JSON.stringify(_line)); + } else { + i++; + } + } + } + + // Parses the --- and +++ headers, if none are found, no lines + // are consumed. + function parseFileHeader(index) { + var fileHeader = /^(---|\+\+\+)\s+(.*)$/.exec(diffstr[i]); + if (fileHeader) { + var keyPrefix = fileHeader[1] === '---' ? 'old' : 'new'; + var data = fileHeader[2].split('\t', 2); + var fileName = data[0].replace(/\\\\/g, '\\'); + if (/^".*"$/.test(fileName)) { + fileName = fileName.substr(1, fileName.length - 2); + } + index[keyPrefix + 'FileName'] = fileName; + index[keyPrefix + 'Header'] = (data[1] || '').trim(); + + i++; + } + } + + // Parses a hunk + // This assumes that we are at the start of a hunk. + function parseHunk() { + var chunkHeaderIndex = i, + chunkHeaderLine = diffstr[i++], + chunkHeader = chunkHeaderLine.split(/@@ -(\d+)(?:,(\d+))? \+(\d+)(?:,(\d+))? @@/); + + var hunk = { + oldStart: +chunkHeader[1], + oldLines: +chunkHeader[2] || 1, + newStart: +chunkHeader[3], + newLines: +chunkHeader[4] || 1, + lines: [], + linedelimiters: [] + }; + + var addCount = 0, + removeCount = 0; + for (; i < diffstr.length; i++) { + // Lines starting with '---' could be mistaken for the "remove line" operation + // But they could be the header for the next file. Therefore prune such cases out. + if (diffstr[i].indexOf('--- ') === 0 && i + 2 < diffstr.length && diffstr[i + 1].indexOf('+++ ') === 0 && diffstr[i + 2].indexOf('@@') === 0) { + break; + } + var operation = diffstr[i].length == 0 && i != diffstr.length - 1 ? ' ' : diffstr[i][0]; + + if (operation === '+' || operation === '-' || operation === ' ' || operation === '\\') { + hunk.lines.push(diffstr[i]); + hunk.linedelimiters.push(delimiters[i] || '\n'); + + if (operation === '+') { + addCount++; + } else if (operation === '-') { + removeCount++; + } else if (operation === ' ') { + addCount++; + removeCount++; + } + } else { + break; + } + } + + // Handle the empty block count case + if (!addCount && hunk.newLines === 1) { + hunk.newLines = 0; + } + if (!removeCount && hunk.oldLines === 1) { + hunk.oldLines = 0; + } + + // Perform optional sanity checking + if (options.strict) { + if (addCount !== hunk.newLines) { + throw new Error('Added line count did not match for hunk at line ' + (chunkHeaderIndex + 1)); + } + if (removeCount !== hunk.oldLines) { + throw new Error('Removed line count did not match for hunk at line ' + (chunkHeaderIndex + 1)); + } + } + + return hunk; + } + + while (i < diffstr.length) { + parseIndex(); + } + + return list; + } + + + +/***/ }), +/* 12 */ +/***/ (function(module, exports) { + + /*istanbul ignore start*/"use strict"; + + exports.__esModule = true; + + exports["default"] = /*istanbul ignore end*/function (start, minLine, maxLine) { + var wantForward = true, + backwardExhausted = false, + forwardExhausted = false, + localOffset = 1; + + return function iterator() { + if (wantForward && !forwardExhausted) { + if (backwardExhausted) { + localOffset++; + } else { + wantForward = false; + } + + // Check if trying to fit beyond text length, and if not, check it fits + // after offset location (or desired location on first iteration) + if (start + localOffset <= maxLine) { + return localOffset; + } + + forwardExhausted = true; + } + + if (!backwardExhausted) { + if (!forwardExhausted) { + wantForward = true; + } + + // Check if trying to fit before text beginning, and if not, check it fits + // before offset location + if (minLine <= start - localOffset) { + return -localOffset++; + } + + backwardExhausted = true; + return iterator(); + } + + // We tried to fit hunk before text beginning and beyond text length, then + // hunk can't fit on the text. Return undefined + }; + }; + + + +/***/ }), +/* 13 */ +/***/ (function(module, exports, __webpack_require__) { + + /*istanbul ignore start*/'use strict'; + + exports.__esModule = true; + exports. /*istanbul ignore end*/calcLineCount = calcLineCount; + /*istanbul ignore start*/exports. /*istanbul ignore end*/merge = merge; + + var /*istanbul ignore start*/_create = __webpack_require__(14) /*istanbul ignore end*/; + + var /*istanbul ignore start*/_parse = __webpack_require__(11) /*istanbul ignore end*/; + + var /*istanbul ignore start*/_array = __webpack_require__(15) /*istanbul ignore end*/; + + /*istanbul ignore start*/function _toConsumableArray(arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) { arr2[i] = arr[i]; } return arr2; } else { return Array.from(arr); } } + + /*istanbul ignore end*/function calcLineCount(hunk) { + /*istanbul ignore start*/var _calcOldNewLineCount = /*istanbul ignore end*/calcOldNewLineCount(hunk.lines), + oldLines = _calcOldNewLineCount.oldLines, + newLines = _calcOldNewLineCount.newLines; + + if (oldLines !== undefined) { + hunk.oldLines = oldLines; + } else { + delete hunk.oldLines; + } + + if (newLines !== undefined) { + hunk.newLines = newLines; + } else { + delete hunk.newLines; + } + } + + function merge(mine, theirs, base) { + mine = loadPatch(mine, base); + theirs = loadPatch(theirs, base); + + var ret = {}; + + // For index we just let it pass through as it doesn't have any necessary meaning. + // Leaving sanity checks on this to the API consumer that may know more about the + // meaning in their own context. + if (mine.index || theirs.index) { + ret.index = mine.index || theirs.index; + } + + if (mine.newFileName || theirs.newFileName) { + if (!fileNameChanged(mine)) { + // No header or no change in ours, use theirs (and ours if theirs does not exist) + ret.oldFileName = theirs.oldFileName || mine.oldFileName; + ret.newFileName = theirs.newFileName || mine.newFileName; + ret.oldHeader = theirs.oldHeader || mine.oldHeader; + ret.newHeader = theirs.newHeader || mine.newHeader; + } else if (!fileNameChanged(theirs)) { + // No header or no change in theirs, use ours + ret.oldFileName = mine.oldFileName; + ret.newFileName = mine.newFileName; + ret.oldHeader = mine.oldHeader; + ret.newHeader = mine.newHeader; + } else { + // Both changed... figure it out + ret.oldFileName = selectField(ret, mine.oldFileName, theirs.oldFileName); + ret.newFileName = selectField(ret, mine.newFileName, theirs.newFileName); + ret.oldHeader = selectField(ret, mine.oldHeader, theirs.oldHeader); + ret.newHeader = selectField(ret, mine.newHeader, theirs.newHeader); + } + } + + ret.hunks = []; + + var mineIndex = 0, + theirsIndex = 0, + mineOffset = 0, + theirsOffset = 0; + + while (mineIndex < mine.hunks.length || theirsIndex < theirs.hunks.length) { + var mineCurrent = mine.hunks[mineIndex] || { oldStart: Infinity }, + theirsCurrent = theirs.hunks[theirsIndex] || { oldStart: Infinity }; + + if (hunkBefore(mineCurrent, theirsCurrent)) { + // This patch does not overlap with any of the others, yay. + ret.hunks.push(cloneHunk(mineCurrent, mineOffset)); + mineIndex++; + theirsOffset += mineCurrent.newLines - mineCurrent.oldLines; + } else if (hunkBefore(theirsCurrent, mineCurrent)) { + // This patch does not overlap with any of the others, yay. + ret.hunks.push(cloneHunk(theirsCurrent, theirsOffset)); + theirsIndex++; + mineOffset += theirsCurrent.newLines - theirsCurrent.oldLines; + } else { + // Overlap, merge as best we can + var mergedHunk = { + oldStart: Math.min(mineCurrent.oldStart, theirsCurrent.oldStart), + oldLines: 0, + newStart: Math.min(mineCurrent.newStart + mineOffset, theirsCurrent.oldStart + theirsOffset), + newLines: 0, + lines: [] + }; + mergeLines(mergedHunk, mineCurrent.oldStart, mineCurrent.lines, theirsCurrent.oldStart, theirsCurrent.lines); + theirsIndex++; + mineIndex++; + + ret.hunks.push(mergedHunk); + } + } + + return ret; + } + + function loadPatch(param, base) { + if (typeof param === 'string') { + if (/^@@/m.test(param) || /^Index:/m.test(param)) { + return (/*istanbul ignore start*/(0, _parse.parsePatch) /*istanbul ignore end*/(param)[0] + ); + } + + if (!base) { + throw new Error('Must provide a base reference or pass in a patch'); + } + return (/*istanbul ignore start*/(0, _create.structuredPatch) /*istanbul ignore end*/(undefined, undefined, base, param) + ); + } + + return param; + } + + function fileNameChanged(patch) { + return patch.newFileName && patch.newFileName !== patch.oldFileName; + } + + function selectField(index, mine, theirs) { + if (mine === theirs) { + return mine; + } else { + index.conflict = true; + return { mine: mine, theirs: theirs }; + } + } + + function hunkBefore(test, check) { + return test.oldStart < check.oldStart && test.oldStart + test.oldLines < check.oldStart; + } + + function cloneHunk(hunk, offset) { + return { + oldStart: hunk.oldStart, oldLines: hunk.oldLines, + newStart: hunk.newStart + offset, newLines: hunk.newLines, + lines: hunk.lines + }; + } + + function mergeLines(hunk, mineOffset, mineLines, theirOffset, theirLines) { + // This will generally result in a conflicted hunk, but there are cases where the context + // is the only overlap where we can successfully merge the content here. + var mine = { offset: mineOffset, lines: mineLines, index: 0 }, + their = { offset: theirOffset, lines: theirLines, index: 0 }; + + // Handle any leading content + insertLeading(hunk, mine, their); + insertLeading(hunk, their, mine); + + // Now in the overlap content. Scan through and select the best changes from each. + while (mine.index < mine.lines.length && their.index < their.lines.length) { + var mineCurrent = mine.lines[mine.index], + theirCurrent = their.lines[their.index]; + + if ((mineCurrent[0] === '-' || mineCurrent[0] === '+') && (theirCurrent[0] === '-' || theirCurrent[0] === '+')) { + // Both modified ... + mutualChange(hunk, mine, their); + } else if (mineCurrent[0] === '+' && theirCurrent[0] === ' ') { + /*istanbul ignore start*/var _hunk$lines; + + /*istanbul ignore end*/ // Mine inserted + /*istanbul ignore start*/(_hunk$lines = /*istanbul ignore end*/hunk.lines).push. /*istanbul ignore start*/apply /*istanbul ignore end*/( /*istanbul ignore start*/_hunk$lines /*istanbul ignore end*/, /*istanbul ignore start*/_toConsumableArray( /*istanbul ignore end*/collectChange(mine))); + } else if (theirCurrent[0] === '+' && mineCurrent[0] === ' ') { + /*istanbul ignore start*/var _hunk$lines2; + + /*istanbul ignore end*/ // Theirs inserted + /*istanbul ignore start*/(_hunk$lines2 = /*istanbul ignore end*/hunk.lines).push. /*istanbul ignore start*/apply /*istanbul ignore end*/( /*istanbul ignore start*/_hunk$lines2 /*istanbul ignore end*/, /*istanbul ignore start*/_toConsumableArray( /*istanbul ignore end*/collectChange(their))); + } else if (mineCurrent[0] === '-' && theirCurrent[0] === ' ') { + // Mine removed or edited + removal(hunk, mine, their); + } else if (theirCurrent[0] === '-' && mineCurrent[0] === ' ') { + // Their removed or edited + removal(hunk, their, mine, true); + } else if (mineCurrent === theirCurrent) { + // Context identity + hunk.lines.push(mineCurrent); + mine.index++; + their.index++; + } else { + // Context mismatch + conflict(hunk, collectChange(mine), collectChange(their)); + } + } + + // Now push anything that may be remaining + insertTrailing(hunk, mine); + insertTrailing(hunk, their); + + calcLineCount(hunk); + } + + function mutualChange(hunk, mine, their) { + var myChanges = collectChange(mine), + theirChanges = collectChange(their); + + if (allRemoves(myChanges) && allRemoves(theirChanges)) { + // Special case for remove changes that are supersets of one another + if ( /*istanbul ignore start*/(0, _array.arrayStartsWith) /*istanbul ignore end*/(myChanges, theirChanges) && skipRemoveSuperset(their, myChanges, myChanges.length - theirChanges.length)) { + /*istanbul ignore start*/var _hunk$lines3; + + /*istanbul ignore end*/ /*istanbul ignore start*/(_hunk$lines3 = /*istanbul ignore end*/hunk.lines).push. /*istanbul ignore start*/apply /*istanbul ignore end*/( /*istanbul ignore start*/_hunk$lines3 /*istanbul ignore end*/, /*istanbul ignore start*/_toConsumableArray( /*istanbul ignore end*/myChanges)); + return; + } else if ( /*istanbul ignore start*/(0, _array.arrayStartsWith) /*istanbul ignore end*/(theirChanges, myChanges) && skipRemoveSuperset(mine, theirChanges, theirChanges.length - myChanges.length)) { + /*istanbul ignore start*/var _hunk$lines4; + + /*istanbul ignore end*/ /*istanbul ignore start*/(_hunk$lines4 = /*istanbul ignore end*/hunk.lines).push. /*istanbul ignore start*/apply /*istanbul ignore end*/( /*istanbul ignore start*/_hunk$lines4 /*istanbul ignore end*/, /*istanbul ignore start*/_toConsumableArray( /*istanbul ignore end*/theirChanges)); + return; + } + } else if ( /*istanbul ignore start*/(0, _array.arrayEqual) /*istanbul ignore end*/(myChanges, theirChanges)) { + /*istanbul ignore start*/var _hunk$lines5; + + /*istanbul ignore end*/ /*istanbul ignore start*/(_hunk$lines5 = /*istanbul ignore end*/hunk.lines).push. /*istanbul ignore start*/apply /*istanbul ignore end*/( /*istanbul ignore start*/_hunk$lines5 /*istanbul ignore end*/, /*istanbul ignore start*/_toConsumableArray( /*istanbul ignore end*/myChanges)); + return; + } + + conflict(hunk, myChanges, theirChanges); + } + + function removal(hunk, mine, their, swap) { + var myChanges = collectChange(mine), + theirChanges = collectContext(their, myChanges); + if (theirChanges.merged) { + /*istanbul ignore start*/var _hunk$lines6; + + /*istanbul ignore end*/ /*istanbul ignore start*/(_hunk$lines6 = /*istanbul ignore end*/hunk.lines).push. /*istanbul ignore start*/apply /*istanbul ignore end*/( /*istanbul ignore start*/_hunk$lines6 /*istanbul ignore end*/, /*istanbul ignore start*/_toConsumableArray( /*istanbul ignore end*/theirChanges.merged)); + } else { + conflict(hunk, swap ? theirChanges : myChanges, swap ? myChanges : theirChanges); + } + } + + function conflict(hunk, mine, their) { + hunk.conflict = true; + hunk.lines.push({ + conflict: true, + mine: mine, + theirs: their + }); + } + + function insertLeading(hunk, insert, their) { + while (insert.offset < their.offset && insert.index < insert.lines.length) { + var line = insert.lines[insert.index++]; + hunk.lines.push(line); + insert.offset++; + } + } + function insertTrailing(hunk, insert) { + while (insert.index < insert.lines.length) { + var line = insert.lines[insert.index++]; + hunk.lines.push(line); + } + } + + function collectChange(state) { + var ret = [], + operation = state.lines[state.index][0]; + while (state.index < state.lines.length) { + var line = state.lines[state.index]; + + // Group additions that are immediately after subtractions and treat them as one "atomic" modify change. + if (operation === '-' && line[0] === '+') { + operation = '+'; + } + + if (operation === line[0]) { + ret.push(line); + state.index++; + } else { + break; + } + } + + return ret; + } + function collectContext(state, matchChanges) { + var changes = [], + merged = [], + matchIndex = 0, + contextChanges = false, + conflicted = false; + while (matchIndex < matchChanges.length && state.index < state.lines.length) { + var change = state.lines[state.index], + match = matchChanges[matchIndex]; + + // Once we've hit our add, then we are done + if (match[0] === '+') { + break; + } + + contextChanges = contextChanges || change[0] !== ' '; + + merged.push(match); + matchIndex++; + + // Consume any additions in the other block as a conflict to attempt + // to pull in the remaining context after this + if (change[0] === '+') { + conflicted = true; + + while (change[0] === '+') { + changes.push(change); + change = state.lines[++state.index]; + } + } + + if (match.substr(1) === change.substr(1)) { + changes.push(change); + state.index++; + } else { + conflicted = true; + } + } + + if ((matchChanges[matchIndex] || '')[0] === '+' && contextChanges) { + conflicted = true; + } + + if (conflicted) { + return changes; + } + + while (matchIndex < matchChanges.length) { + merged.push(matchChanges[matchIndex++]); + } + + return { + merged: merged, + changes: changes + }; + } + + function allRemoves(changes) { + return changes.reduce(function (prev, change) { + return prev && change[0] === '-'; + }, true); + } + function skipRemoveSuperset(state, removeChanges, delta) { + for (var i = 0; i < delta; i++) { + var changeContent = removeChanges[removeChanges.length - delta + i].substr(1); + if (state.lines[state.index + i] !== ' ' + changeContent) { + return false; + } + } + + state.index += delta; + return true; + } + + function calcOldNewLineCount(lines) { + var oldLines = 0; + var newLines = 0; + + lines.forEach(function (line) { + if (typeof line !== 'string') { + var myCount = calcOldNewLineCount(line.mine); + var theirCount = calcOldNewLineCount(line.theirs); + + if (oldLines !== undefined) { + if (myCount.oldLines === theirCount.oldLines) { + oldLines += myCount.oldLines; + } else { + oldLines = undefined; + } + } + + if (newLines !== undefined) { + if (myCount.newLines === theirCount.newLines) { + newLines += myCount.newLines; + } else { + newLines = undefined; + } + } + } else { + if (newLines !== undefined && (line[0] === '+' || line[0] === ' ')) { + newLines++; + } + if (oldLines !== undefined && (line[0] === '-' || line[0] === ' ')) { + oldLines++; + } + } + }); + + return { oldLines: oldLines, newLines: newLines }; + } + + + +/***/ }), +/* 14 */ +/***/ (function(module, exports, __webpack_require__) { + + /*istanbul ignore start*/'use strict'; + + exports.__esModule = true; + exports. /*istanbul ignore end*/structuredPatch = structuredPatch; + /*istanbul ignore start*/exports. /*istanbul ignore end*/createTwoFilesPatch = createTwoFilesPatch; + /*istanbul ignore start*/exports. /*istanbul ignore end*/createPatch = createPatch; + + var /*istanbul ignore start*/_line = __webpack_require__(5) /*istanbul ignore end*/; + + /*istanbul ignore start*/function _toConsumableArray(arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) { arr2[i] = arr[i]; } return arr2; } else { return Array.from(arr); } } + + /*istanbul ignore end*/function structuredPatch(oldFileName, newFileName, oldStr, newStr, oldHeader, newHeader, options) { + if (!options) { + options = {}; + } + if (typeof options.context === 'undefined') { + options.context = 4; + } + + var diff = /*istanbul ignore start*/(0, _line.diffLines) /*istanbul ignore end*/(oldStr, newStr, options); + diff.push({ value: '', lines: [] }); // Append an empty value to make cleanup easier + + function contextLines(lines) { + return lines.map(function (entry) { + return ' ' + entry; + }); + } + + var hunks = []; + var oldRangeStart = 0, + newRangeStart = 0, + curRange = [], + oldLine = 1, + newLine = 1; + + /*istanbul ignore start*/var _loop = function _loop( /*istanbul ignore end*/i) { + var current = diff[i], + lines = current.lines || current.value.replace(/\n$/, '').split('\n'); + current.lines = lines; + + if (current.added || current.removed) { + /*istanbul ignore start*/var _curRange; + + /*istanbul ignore end*/ // If we have previous context, start with that + if (!oldRangeStart) { + var prev = diff[i - 1]; + oldRangeStart = oldLine; + newRangeStart = newLine; + + if (prev) { + curRange = options.context > 0 ? contextLines(prev.lines.slice(-options.context)) : []; + oldRangeStart -= curRange.length; + newRangeStart -= curRange.length; + } + } + + // Output our changes + /*istanbul ignore start*/(_curRange = /*istanbul ignore end*/curRange).push. /*istanbul ignore start*/apply /*istanbul ignore end*/( /*istanbul ignore start*/_curRange /*istanbul ignore end*/, /*istanbul ignore start*/_toConsumableArray( /*istanbul ignore end*/lines.map(function (entry) { + return (current.added ? '+' : '-') + entry; + }))); + + // Track the updated file position + if (current.added) { + newLine += lines.length; + } else { + oldLine += lines.length; + } + } else { + // Identical context lines. Track line changes + if (oldRangeStart) { + // Close out any changes that have been output (or join overlapping) + if (lines.length <= options.context * 2 && i < diff.length - 2) { + /*istanbul ignore start*/var _curRange2; + + /*istanbul ignore end*/ // Overlapping + /*istanbul ignore start*/(_curRange2 = /*istanbul ignore end*/curRange).push. /*istanbul ignore start*/apply /*istanbul ignore end*/( /*istanbul ignore start*/_curRange2 /*istanbul ignore end*/, /*istanbul ignore start*/_toConsumableArray( /*istanbul ignore end*/contextLines(lines))); + } else { + /*istanbul ignore start*/var _curRange3; + + /*istanbul ignore end*/ // end the range and output + var contextSize = Math.min(lines.length, options.context); + /*istanbul ignore start*/(_curRange3 = /*istanbul ignore end*/curRange).push. /*istanbul ignore start*/apply /*istanbul ignore end*/( /*istanbul ignore start*/_curRange3 /*istanbul ignore end*/, /*istanbul ignore start*/_toConsumableArray( /*istanbul ignore end*/contextLines(lines.slice(0, contextSize)))); + + var hunk = { + oldStart: oldRangeStart, + oldLines: oldLine - oldRangeStart + contextSize, + newStart: newRangeStart, + newLines: newLine - newRangeStart + contextSize, + lines: curRange + }; + if (i >= diff.length - 2 && lines.length <= options.context) { + // EOF is inside this hunk + var oldEOFNewline = /\n$/.test(oldStr); + var newEOFNewline = /\n$/.test(newStr); + if (lines.length == 0 && !oldEOFNewline) { + // special case: old has no eol and no trailing context; no-nl can end up before adds + curRange.splice(hunk.oldLines, 0, '\\ No newline at end of file'); + } else if (!oldEOFNewline || !newEOFNewline) { + curRange.push('\\ No newline at end of file'); + } + } + hunks.push(hunk); + + oldRangeStart = 0; + newRangeStart = 0; + curRange = []; + } + } + oldLine += lines.length; + newLine += lines.length; + } + }; + + for (var i = 0; i < diff.length; i++) { + /*istanbul ignore start*/_loop( /*istanbul ignore end*/i); + } + + return { + oldFileName: oldFileName, newFileName: newFileName, + oldHeader: oldHeader, newHeader: newHeader, + hunks: hunks + }; + } + + function createTwoFilesPatch(oldFileName, newFileName, oldStr, newStr, oldHeader, newHeader, options) { + var diff = structuredPatch(oldFileName, newFileName, oldStr, newStr, oldHeader, newHeader, options); + + var ret = []; + if (oldFileName == newFileName) { + ret.push('Index: ' + oldFileName); + } + ret.push('==================================================================='); + ret.push('--- ' + diff.oldFileName + (typeof diff.oldHeader === 'undefined' ? '' : '\t' + diff.oldHeader)); + ret.push('+++ ' + diff.newFileName + (typeof diff.newHeader === 'undefined' ? '' : '\t' + diff.newHeader)); + + for (var i = 0; i < diff.hunks.length; i++) { + var hunk = diff.hunks[i]; + ret.push('@@ -' + hunk.oldStart + ',' + hunk.oldLines + ' +' + hunk.newStart + ',' + hunk.newLines + ' @@'); + ret.push.apply(ret, hunk.lines); + } + + return ret.join('\n') + '\n'; + } + + function createPatch(fileName, oldStr, newStr, oldHeader, newHeader, options) { + return createTwoFilesPatch(fileName, fileName, oldStr, newStr, oldHeader, newHeader, options); + } + + + +/***/ }), +/* 15 */ +/***/ (function(module, exports) { + + /*istanbul ignore start*/"use strict"; + + exports.__esModule = true; + exports. /*istanbul ignore end*/arrayEqual = arrayEqual; + /*istanbul ignore start*/exports. /*istanbul ignore end*/arrayStartsWith = arrayStartsWith; + function arrayEqual(a, b) { + if (a.length !== b.length) { + return false; + } + + return arrayStartsWith(a, b); + } + + function arrayStartsWith(array, start) { + if (start.length > array.length) { + return false; + } + + for (var i = 0; i < start.length; i++) { + if (start[i] !== array[i]) { + return false; + } + } + + return true; + } + + + +/***/ }), +/* 16 */ +/***/ (function(module, exports) { + + /*istanbul ignore start*/"use strict"; + + exports.__esModule = true; + exports. /*istanbul ignore end*/convertChangesToDMP = convertChangesToDMP; + // See: http://code.google.com/p/google-diff-match-patch/wiki/API + function convertChangesToDMP(changes) { + var ret = [], + change = /*istanbul ignore start*/void 0 /*istanbul ignore end*/, + operation = /*istanbul ignore start*/void 0 /*istanbul ignore end*/; + for (var i = 0; i < changes.length; i++) { + change = changes[i]; + if (change.added) { + operation = 1; + } else if (change.removed) { + operation = -1; + } else { + operation = 0; + } + + ret.push([operation, change.value]); + } + return ret; + } + + + +/***/ }), +/* 17 */ +/***/ (function(module, exports) { + + /*istanbul ignore start*/'use strict'; + + exports.__esModule = true; + exports. /*istanbul ignore end*/convertChangesToXML = convertChangesToXML; + function convertChangesToXML(changes) { + var ret = []; + for (var i = 0; i < changes.length; i++) { + var change = changes[i]; + if (change.added) { + ret.push(''); + } else if (change.removed) { + ret.push(''); + } + + ret.push(escapeHTML(change.value)); + + if (change.added) { + ret.push(''); + } else if (change.removed) { + ret.push(''); + } + } + return ret.join(''); + } + + function escapeHTML(s) { + var n = s; + n = n.replace(/&/g, '&'); + n = n.replace(//g, '>'); + n = n.replace(/"/g, '"'); + + return n; + } + + + +/***/ }) +/******/ ]) +}); +; +},{}],70:[function(require,module,exports){ +module.exports = Array.isArray || function (arr) { + return Object.prototype.toString.call(arr) == '[object Array]'; +}; + +},{}],71:[function(require,module,exports){ +module.exports = extend; + +/* + var obj = {a: 3, b: 5}; + extend(obj, {a: 4, c: 8}); // {a: 4, b: 5, c: 8} + obj; // {a: 4, b: 5, c: 8} + + var obj = {a: 3, b: 5}; + extend({}, obj, {a: 4, c: 8}); // {a: 4, b: 5, c: 8} + obj; // {a: 3, b: 5} + + var arr = [1, 2, 3]; + var obj = {a: 3, b: 5}; + extend(obj, {c: arr}); // {a: 3, b: 5, c: [1, 2, 3]} + arr.push(4); + obj; // {a: 3, b: 5, c: [1, 2, 3, 4]} + + var arr = [1, 2, 3]; + var obj = {a: 3, b: 5}; + extend(true, obj, {c: arr}); // {a: 3, b: 5, c: [1, 2, 3]} + arr.push(4); + obj; // {a: 3, b: 5, c: [1, 2, 3]} + + extend({a: 4, b: 5}); // {a: 4, b: 5} + extend({a: 4, b: 5}, 3); {a: 4, b: 5} + extend({a: 4, b: 5}, true); {a: 4, b: 5} + extend('hello', {a: 4, b: 5}); // throws + extend(3, {a: 4, b: 5}); // throws +*/ + +function extend(/* [deep], obj1, obj2, [objn] */) { + var args = [].slice.call(arguments); + var deep = false; + if (typeof args[0] == 'boolean') { + deep = args.shift(); + } + var result = args[0]; + if (!result || (typeof result != 'object' && typeof result != 'function')) { + throw new Error('extendee must be an object'); + } + var extenders = args.slice(1); + var len = extenders.length; + for (var i = 0; i < len; i++) { + var extender = extenders[i]; + for (var key in extender) { + if (extender.hasOwnProperty(key)) { + var value = extender[key]; + if (deep && isCloneable(value)) { + var base = Array.isArray(value) ? [] : {}; + result[key] = extend(true, result.hasOwnProperty(key) ? result[key] : base, value); + } else { + result[key] = value; + } + } + } + } + return result; +} + +function isCloneable(obj) { + return Array.isArray(obj) || {}.toString.call(obj) == '[object Object]'; +} + +},{}],72:[function(require,module,exports){ +(function (global){ +/** + * @license + * Lodash + * Copyright JS Foundation and other contributors + * Released under MIT license + * Based on Underscore.js 1.8.3 + * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors + */ +;(function() { + + /** Used as a safe reference for `undefined` in pre-ES5 environments. */ + var undefined; + + /** Used as the semantic version number. */ + var VERSION = '4.17.11'; + + /** Used as the size to enable large array optimizations. */ + var LARGE_ARRAY_SIZE = 200; + + /** Error message constants. */ + var CORE_ERROR_TEXT = 'Unsupported core-js use. Try https://npms.io/search?q=ponyfill.', + FUNC_ERROR_TEXT = 'Expected a function'; + + /** Used to stand-in for `undefined` hash values. */ + var HASH_UNDEFINED = '__lodash_hash_undefined__'; + + /** Used as the maximum memoize cache size. */ + var MAX_MEMOIZE_SIZE = 500; + + /** Used as the internal argument placeholder. */ + var PLACEHOLDER = '__lodash_placeholder__'; + + /** Used to compose bitmasks for cloning. */ + var CLONE_DEEP_FLAG = 1, + CLONE_FLAT_FLAG = 2, + CLONE_SYMBOLS_FLAG = 4; + + /** Used to compose bitmasks for value comparisons. */ + var COMPARE_PARTIAL_FLAG = 1, + COMPARE_UNORDERED_FLAG = 2; + + /** Used to compose bitmasks for function metadata. */ + var WRAP_BIND_FLAG = 1, + WRAP_BIND_KEY_FLAG = 2, + WRAP_CURRY_BOUND_FLAG = 4, + WRAP_CURRY_FLAG = 8, + WRAP_CURRY_RIGHT_FLAG = 16, + WRAP_PARTIAL_FLAG = 32, + WRAP_PARTIAL_RIGHT_FLAG = 64, + WRAP_ARY_FLAG = 128, + WRAP_REARG_FLAG = 256, + WRAP_FLIP_FLAG = 512; + + /** Used as default options for `_.truncate`. */ + var DEFAULT_TRUNC_LENGTH = 30, + DEFAULT_TRUNC_OMISSION = '...'; + + /** Used to detect hot functions by number of calls within a span of milliseconds. */ + var HOT_COUNT = 800, + HOT_SPAN = 16; + + /** Used to indicate the type of lazy iteratees. */ + var LAZY_FILTER_FLAG = 1, + LAZY_MAP_FLAG = 2, + LAZY_WHILE_FLAG = 3; + + /** Used as references for various `Number` constants. */ + var INFINITY = 1 / 0, + MAX_SAFE_INTEGER = 9007199254740991, + MAX_INTEGER = 1.7976931348623157e+308, + NAN = 0 / 0; + + /** Used as references for the maximum length and index of an array. */ + var MAX_ARRAY_LENGTH = 4294967295, + MAX_ARRAY_INDEX = MAX_ARRAY_LENGTH - 1, + HALF_MAX_ARRAY_LENGTH = MAX_ARRAY_LENGTH >>> 1; + + /** Used to associate wrap methods with their bit flags. */ + var wrapFlags = [ + ['ary', WRAP_ARY_FLAG], + ['bind', WRAP_BIND_FLAG], + ['bindKey', WRAP_BIND_KEY_FLAG], + ['curry', WRAP_CURRY_FLAG], + ['curryRight', WRAP_CURRY_RIGHT_FLAG], + ['flip', WRAP_FLIP_FLAG], + ['partial', WRAP_PARTIAL_FLAG], + ['partialRight', WRAP_PARTIAL_RIGHT_FLAG], + ['rearg', WRAP_REARG_FLAG] + ]; + + /** `Object#toString` result references. */ + var argsTag = '[object Arguments]', + arrayTag = '[object Array]', + asyncTag = '[object AsyncFunction]', + boolTag = '[object Boolean]', + dateTag = '[object Date]', + domExcTag = '[object DOMException]', + errorTag = '[object Error]', + funcTag = '[object Function]', + genTag = '[object GeneratorFunction]', + mapTag = '[object Map]', + numberTag = '[object Number]', + nullTag = '[object Null]', + objectTag = '[object Object]', + promiseTag = '[object Promise]', + proxyTag = '[object Proxy]', + regexpTag = '[object RegExp]', + setTag = '[object Set]', + stringTag = '[object String]', + symbolTag = '[object Symbol]', + undefinedTag = '[object Undefined]', + weakMapTag = '[object WeakMap]', + weakSetTag = '[object WeakSet]'; + + var arrayBufferTag = '[object ArrayBuffer]', + dataViewTag = '[object DataView]', + float32Tag = '[object Float32Array]', + float64Tag = '[object Float64Array]', + int8Tag = '[object Int8Array]', + int16Tag = '[object Int16Array]', + int32Tag = '[object Int32Array]', + uint8Tag = '[object Uint8Array]', + uint8ClampedTag = '[object Uint8ClampedArray]', + uint16Tag = '[object Uint16Array]', + uint32Tag = '[object Uint32Array]'; + + /** Used to match empty string literals in compiled template source. */ + var reEmptyStringLeading = /\b__p \+= '';/g, + reEmptyStringMiddle = /\b(__p \+=) '' \+/g, + reEmptyStringTrailing = /(__e\(.*?\)|\b__t\)) \+\n'';/g; + + /** Used to match HTML entities and HTML characters. */ + var reEscapedHtml = /&(?:amp|lt|gt|quot|#39);/g, + reUnescapedHtml = /[&<>"']/g, + reHasEscapedHtml = RegExp(reEscapedHtml.source), + reHasUnescapedHtml = RegExp(reUnescapedHtml.source); + + /** Used to match template delimiters. */ + var reEscape = /<%-([\s\S]+?)%>/g, + reEvaluate = /<%([\s\S]+?)%>/g, + reInterpolate = /<%=([\s\S]+?)%>/g; + + /** Used to match property names within property paths. */ + var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/, + reIsPlainProp = /^\w*$/, + rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(?:\.|\[\])(?:\.|\[\]|$))/g; + + /** + * Used to match `RegExp` + * [syntax characters](http://ecma-international.org/ecma-262/7.0/#sec-patterns). + */ + var reRegExpChar = /[\\^$.*+?()[\]{}|]/g, + reHasRegExpChar = RegExp(reRegExpChar.source); + + /** Used to match leading and trailing whitespace. */ + var reTrim = /^\s+|\s+$/g, + reTrimStart = /^\s+/, + reTrimEnd = /\s+$/; + + /** Used to match wrap detail comments. */ + var reWrapComment = /\{(?:\n\/\* \[wrapped with .+\] \*\/)?\n?/, + reWrapDetails = /\{\n\/\* \[wrapped with (.+)\] \*/, + reSplitDetails = /,? & /; + + /** Used to match words composed of alphanumeric characters. */ + var reAsciiWord = /[^\x00-\x2f\x3a-\x40\x5b-\x60\x7b-\x7f]+/g; + + /** Used to match backslashes in property paths. */ + var reEscapeChar = /\\(\\)?/g; + + /** + * Used to match + * [ES template delimiters](http://ecma-international.org/ecma-262/7.0/#sec-template-literal-lexical-components). + */ + var reEsTemplate = /\$\{([^\\}]*(?:\\.[^\\}]*)*)\}/g; + + /** Used to match `RegExp` flags from their coerced string values. */ + var reFlags = /\w*$/; + + /** Used to detect bad signed hexadecimal string values. */ + var reIsBadHex = /^[-+]0x[0-9a-f]+$/i; + + /** Used to detect binary string values. */ + var reIsBinary = /^0b[01]+$/i; + + /** Used to detect host constructors (Safari). */ + var reIsHostCtor = /^\[object .+?Constructor\]$/; + + /** Used to detect octal string values. */ + var reIsOctal = /^0o[0-7]+$/i; + + /** Used to detect unsigned integer values. */ + var reIsUint = /^(?:0|[1-9]\d*)$/; + + /** Used to match Latin Unicode letters (excluding mathematical operators). */ + var reLatin = /[\xc0-\xd6\xd8-\xf6\xf8-\xff\u0100-\u017f]/g; + + /** Used to ensure capturing order of template delimiters. */ + var reNoMatch = /($^)/; + + /** Used to match unescaped characters in compiled string literals. */ + var reUnescapedString = /['\n\r\u2028\u2029\\]/g; + + /** Used to compose unicode character classes. */ + var rsAstralRange = '\\ud800-\\udfff', + rsComboMarksRange = '\\u0300-\\u036f', + reComboHalfMarksRange = '\\ufe20-\\ufe2f', + rsComboSymbolsRange = '\\u20d0-\\u20ff', + rsComboRange = rsComboMarksRange + reComboHalfMarksRange + rsComboSymbolsRange, + rsDingbatRange = '\\u2700-\\u27bf', + rsLowerRange = 'a-z\\xdf-\\xf6\\xf8-\\xff', + rsMathOpRange = '\\xac\\xb1\\xd7\\xf7', + rsNonCharRange = '\\x00-\\x2f\\x3a-\\x40\\x5b-\\x60\\x7b-\\xbf', + rsPunctuationRange = '\\u2000-\\u206f', + rsSpaceRange = ' \\t\\x0b\\f\\xa0\\ufeff\\n\\r\\u2028\\u2029\\u1680\\u180e\\u2000\\u2001\\u2002\\u2003\\u2004\\u2005\\u2006\\u2007\\u2008\\u2009\\u200a\\u202f\\u205f\\u3000', + rsUpperRange = 'A-Z\\xc0-\\xd6\\xd8-\\xde', + rsVarRange = '\\ufe0e\\ufe0f', + rsBreakRange = rsMathOpRange + rsNonCharRange + rsPunctuationRange + rsSpaceRange; + + /** Used to compose unicode capture groups. */ + var rsApos = "['\u2019]", + rsAstral = '[' + rsAstralRange + ']', + rsBreak = '[' + rsBreakRange + ']', + rsCombo = '[' + rsComboRange + ']', + rsDigits = '\\d+', + rsDingbat = '[' + rsDingbatRange + ']', + rsLower = '[' + rsLowerRange + ']', + rsMisc = '[^' + rsAstralRange + rsBreakRange + rsDigits + rsDingbatRange + rsLowerRange + rsUpperRange + ']', + rsFitz = '\\ud83c[\\udffb-\\udfff]', + rsModifier = '(?:' + rsCombo + '|' + rsFitz + ')', + rsNonAstral = '[^' + rsAstralRange + ']', + rsRegional = '(?:\\ud83c[\\udde6-\\uddff]){2}', + rsSurrPair = '[\\ud800-\\udbff][\\udc00-\\udfff]', + rsUpper = '[' + rsUpperRange + ']', + rsZWJ = '\\u200d'; + + /** Used to compose unicode regexes. */ + var rsMiscLower = '(?:' + rsLower + '|' + rsMisc + ')', + rsMiscUpper = '(?:' + rsUpper + '|' + rsMisc + ')', + rsOptContrLower = '(?:' + rsApos + '(?:d|ll|m|re|s|t|ve))?', + rsOptContrUpper = '(?:' + rsApos + '(?:D|LL|M|RE|S|T|VE))?', + reOptMod = rsModifier + '?', + rsOptVar = '[' + rsVarRange + ']?', + rsOptJoin = '(?:' + rsZWJ + '(?:' + [rsNonAstral, rsRegional, rsSurrPair].join('|') + ')' + rsOptVar + reOptMod + ')*', + rsOrdLower = '\\d*(?:1st|2nd|3rd|(?![123])\\dth)(?=\\b|[A-Z_])', + rsOrdUpper = '\\d*(?:1ST|2ND|3RD|(?![123])\\dTH)(?=\\b|[a-z_])', + rsSeq = rsOptVar + reOptMod + rsOptJoin, + rsEmoji = '(?:' + [rsDingbat, rsRegional, rsSurrPair].join('|') + ')' + rsSeq, + rsSymbol = '(?:' + [rsNonAstral + rsCombo + '?', rsCombo, rsRegional, rsSurrPair, rsAstral].join('|') + ')'; + + /** Used to match apostrophes. */ + var reApos = RegExp(rsApos, 'g'); + + /** + * Used to match [combining diacritical marks](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks) and + * [combining diacritical marks for symbols](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks_for_Symbols). + */ + var reComboMark = RegExp(rsCombo, 'g'); + + /** Used to match [string symbols](https://mathiasbynens.be/notes/javascript-unicode). */ + var reUnicode = RegExp(rsFitz + '(?=' + rsFitz + ')|' + rsSymbol + rsSeq, 'g'); + + /** Used to match complex or compound words. */ + var reUnicodeWord = RegExp([ + rsUpper + '?' + rsLower + '+' + rsOptContrLower + '(?=' + [rsBreak, rsUpper, '$'].join('|') + ')', + rsMiscUpper + '+' + rsOptContrUpper + '(?=' + [rsBreak, rsUpper + rsMiscLower, '$'].join('|') + ')', + rsUpper + '?' + rsMiscLower + '+' + rsOptContrLower, + rsUpper + '+' + rsOptContrUpper, + rsOrdUpper, + rsOrdLower, + rsDigits, + rsEmoji + ].join('|'), 'g'); + + /** Used to detect strings with [zero-width joiners or code points from the astral planes](http://eev.ee/blog/2015/09/12/dark-corners-of-unicode/). */ + var reHasUnicode = RegExp('[' + rsZWJ + rsAstralRange + rsComboRange + rsVarRange + ']'); + + /** Used to detect strings that need a more robust regexp to match words. */ + var reHasUnicodeWord = /[a-z][A-Z]|[A-Z]{2}[a-z]|[0-9][a-zA-Z]|[a-zA-Z][0-9]|[^a-zA-Z0-9 ]/; + + /** Used to assign default `context` object properties. */ + var contextProps = [ + 'Array', 'Buffer', 'DataView', 'Date', 'Error', 'Float32Array', 'Float64Array', + 'Function', 'Int8Array', 'Int16Array', 'Int32Array', 'Map', 'Math', 'Object', + 'Promise', 'RegExp', 'Set', 'String', 'Symbol', 'TypeError', 'Uint8Array', + 'Uint8ClampedArray', 'Uint16Array', 'Uint32Array', 'WeakMap', + '_', 'clearTimeout', 'isFinite', 'parseInt', 'setTimeout' + ]; + + /** Used to make template sourceURLs easier to identify. */ + var templateCounter = -1; + + /** Used to identify `toStringTag` values of typed arrays. */ + var typedArrayTags = {}; + typedArrayTags[float32Tag] = typedArrayTags[float64Tag] = + typedArrayTags[int8Tag] = typedArrayTags[int16Tag] = + typedArrayTags[int32Tag] = typedArrayTags[uint8Tag] = + typedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] = + typedArrayTags[uint32Tag] = true; + typedArrayTags[argsTag] = typedArrayTags[arrayTag] = + typedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] = + typedArrayTags[dataViewTag] = typedArrayTags[dateTag] = + typedArrayTags[errorTag] = typedArrayTags[funcTag] = + typedArrayTags[mapTag] = typedArrayTags[numberTag] = + typedArrayTags[objectTag] = typedArrayTags[regexpTag] = + typedArrayTags[setTag] = typedArrayTags[stringTag] = + typedArrayTags[weakMapTag] = false; + + /** Used to identify `toStringTag` values supported by `_.clone`. */ + var cloneableTags = {}; + cloneableTags[argsTag] = cloneableTags[arrayTag] = + cloneableTags[arrayBufferTag] = cloneableTags[dataViewTag] = + cloneableTags[boolTag] = cloneableTags[dateTag] = + cloneableTags[float32Tag] = cloneableTags[float64Tag] = + cloneableTags[int8Tag] = cloneableTags[int16Tag] = + cloneableTags[int32Tag] = cloneableTags[mapTag] = + cloneableTags[numberTag] = cloneableTags[objectTag] = + cloneableTags[regexpTag] = cloneableTags[setTag] = + cloneableTags[stringTag] = cloneableTags[symbolTag] = + cloneableTags[uint8Tag] = cloneableTags[uint8ClampedTag] = + cloneableTags[uint16Tag] = cloneableTags[uint32Tag] = true; + cloneableTags[errorTag] = cloneableTags[funcTag] = + cloneableTags[weakMapTag] = false; + + /** Used to map Latin Unicode letters to basic Latin letters. */ + var deburredLetters = { + // Latin-1 Supplement block. + '\xc0': 'A', '\xc1': 'A', '\xc2': 'A', '\xc3': 'A', '\xc4': 'A', '\xc5': 'A', + '\xe0': 'a', '\xe1': 'a', '\xe2': 'a', '\xe3': 'a', '\xe4': 'a', '\xe5': 'a', + '\xc7': 'C', '\xe7': 'c', + '\xd0': 'D', '\xf0': 'd', + '\xc8': 'E', '\xc9': 'E', '\xca': 'E', '\xcb': 'E', + '\xe8': 'e', '\xe9': 'e', '\xea': 'e', '\xeb': 'e', + '\xcc': 'I', '\xcd': 'I', '\xce': 'I', '\xcf': 'I', + '\xec': 'i', '\xed': 'i', '\xee': 'i', '\xef': 'i', + '\xd1': 'N', '\xf1': 'n', + '\xd2': 'O', '\xd3': 'O', '\xd4': 'O', '\xd5': 'O', '\xd6': 'O', '\xd8': 'O', + '\xf2': 'o', '\xf3': 'o', '\xf4': 'o', '\xf5': 'o', '\xf6': 'o', '\xf8': 'o', + '\xd9': 'U', '\xda': 'U', '\xdb': 'U', '\xdc': 'U', + '\xf9': 'u', '\xfa': 'u', '\xfb': 'u', '\xfc': 'u', + '\xdd': 'Y', '\xfd': 'y', '\xff': 'y', + '\xc6': 'Ae', '\xe6': 'ae', + '\xde': 'Th', '\xfe': 'th', + '\xdf': 'ss', + // Latin Extended-A block. + '\u0100': 'A', '\u0102': 'A', '\u0104': 'A', + '\u0101': 'a', '\u0103': 'a', '\u0105': 'a', + '\u0106': 'C', '\u0108': 'C', '\u010a': 'C', '\u010c': 'C', + '\u0107': 'c', '\u0109': 'c', '\u010b': 'c', '\u010d': 'c', + '\u010e': 'D', '\u0110': 'D', '\u010f': 'd', '\u0111': 'd', + '\u0112': 'E', '\u0114': 'E', '\u0116': 'E', '\u0118': 'E', '\u011a': 'E', + '\u0113': 'e', '\u0115': 'e', '\u0117': 'e', '\u0119': 'e', '\u011b': 'e', + '\u011c': 'G', '\u011e': 'G', '\u0120': 'G', '\u0122': 'G', + '\u011d': 'g', '\u011f': 'g', '\u0121': 'g', '\u0123': 'g', + '\u0124': 'H', '\u0126': 'H', '\u0125': 'h', '\u0127': 'h', + '\u0128': 'I', '\u012a': 'I', '\u012c': 'I', '\u012e': 'I', '\u0130': 'I', + '\u0129': 'i', '\u012b': 'i', '\u012d': 'i', '\u012f': 'i', '\u0131': 'i', + '\u0134': 'J', '\u0135': 'j', + '\u0136': 'K', '\u0137': 'k', '\u0138': 'k', + '\u0139': 'L', '\u013b': 'L', '\u013d': 'L', '\u013f': 'L', '\u0141': 'L', + '\u013a': 'l', '\u013c': 'l', '\u013e': 'l', '\u0140': 'l', '\u0142': 'l', + '\u0143': 'N', '\u0145': 'N', '\u0147': 'N', '\u014a': 'N', + '\u0144': 'n', '\u0146': 'n', '\u0148': 'n', '\u014b': 'n', + '\u014c': 'O', '\u014e': 'O', '\u0150': 'O', + '\u014d': 'o', '\u014f': 'o', '\u0151': 'o', + '\u0154': 'R', '\u0156': 'R', '\u0158': 'R', + '\u0155': 'r', '\u0157': 'r', '\u0159': 'r', + '\u015a': 'S', '\u015c': 'S', '\u015e': 'S', '\u0160': 'S', + '\u015b': 's', '\u015d': 's', '\u015f': 's', '\u0161': 's', + '\u0162': 'T', '\u0164': 'T', '\u0166': 'T', + '\u0163': 't', '\u0165': 't', '\u0167': 't', + '\u0168': 'U', '\u016a': 'U', '\u016c': 'U', '\u016e': 'U', '\u0170': 'U', '\u0172': 'U', + '\u0169': 'u', '\u016b': 'u', '\u016d': 'u', '\u016f': 'u', '\u0171': 'u', '\u0173': 'u', + '\u0174': 'W', '\u0175': 'w', + '\u0176': 'Y', '\u0177': 'y', '\u0178': 'Y', + '\u0179': 'Z', '\u017b': 'Z', '\u017d': 'Z', + '\u017a': 'z', '\u017c': 'z', '\u017e': 'z', + '\u0132': 'IJ', '\u0133': 'ij', + '\u0152': 'Oe', '\u0153': 'oe', + '\u0149': "'n", '\u017f': 's' + }; + + /** Used to map characters to HTML entities. */ + var htmlEscapes = { + '&': '&', + '<': '<', + '>': '>', + '"': '"', + "'": ''' + }; + + /** Used to map HTML entities to characters. */ + var htmlUnescapes = { + '&': '&', + '<': '<', + '>': '>', + '"': '"', + ''': "'" + }; + + /** Used to escape characters for inclusion in compiled string literals. */ + var stringEscapes = { + '\\': '\\', + "'": "'", + '\n': 'n', + '\r': 'r', + '\u2028': 'u2028', + '\u2029': 'u2029' + }; + + /** Built-in method references without a dependency on `root`. */ + var freeParseFloat = parseFloat, + freeParseInt = parseInt; + + /** Detect free variable `global` from Node.js. */ + var freeGlobal = typeof global == 'object' && global && global.Object === Object && global; + + /** Detect free variable `self`. */ + var freeSelf = typeof self == 'object' && self && self.Object === Object && self; + + /** Used as a reference to the global object. */ + var root = freeGlobal || freeSelf || Function('return this')(); + + /** Detect free variable `exports`. */ + var freeExports = typeof exports == 'object' && exports && !exports.nodeType && exports; + + /** Detect free variable `module`. */ + var freeModule = freeExports && typeof module == 'object' && module && !module.nodeType && module; + + /** Detect the popular CommonJS extension `module.exports`. */ + var moduleExports = freeModule && freeModule.exports === freeExports; + + /** Detect free variable `process` from Node.js. */ + var freeProcess = moduleExports && freeGlobal.process; + + /** Used to access faster Node.js helpers. */ + var nodeUtil = (function() { + try { + // Use `util.types` for Node.js 10+. + var types = freeModule && freeModule.require && freeModule.require('util').types; + + if (types) { + return types; + } + + // Legacy `process.binding('util')` for Node.js < 10. + return freeProcess && freeProcess.binding && freeProcess.binding('util'); + } catch (e) {} + }()); + + /* Node.js helper references. */ + var nodeIsArrayBuffer = nodeUtil && nodeUtil.isArrayBuffer, + nodeIsDate = nodeUtil && nodeUtil.isDate, + nodeIsMap = nodeUtil && nodeUtil.isMap, + nodeIsRegExp = nodeUtil && nodeUtil.isRegExp, + nodeIsSet = nodeUtil && nodeUtil.isSet, + nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray; + + /*--------------------------------------------------------------------------*/ + + /** + * A faster alternative to `Function#apply`, this function invokes `func` + * with the `this` binding of `thisArg` and the arguments of `args`. + * + * @private + * @param {Function} func The function to invoke. + * @param {*} thisArg The `this` binding of `func`. + * @param {Array} args The arguments to invoke `func` with. + * @returns {*} Returns the result of `func`. + */ + function apply(func, thisArg, args) { + switch (args.length) { + case 0: return func.call(thisArg); + case 1: return func.call(thisArg, args[0]); + case 2: return func.call(thisArg, args[0], args[1]); + case 3: return func.call(thisArg, args[0], args[1], args[2]); + } + return func.apply(thisArg, args); + } + + /** + * A specialized version of `baseAggregator` for arrays. + * + * @private + * @param {Array} [array] The array to iterate over. + * @param {Function} setter The function to set `accumulator` values. + * @param {Function} iteratee The iteratee to transform keys. + * @param {Object} accumulator The initial aggregated object. + * @returns {Function} Returns `accumulator`. + */ + function arrayAggregator(array, setter, iteratee, accumulator) { + var index = -1, + length = array == null ? 0 : array.length; + + while (++index < length) { + var value = array[index]; + setter(accumulator, value, iteratee(value), array); + } + return accumulator; + } + + /** + * A specialized version of `_.forEach` for arrays without support for + * iteratee shorthands. + * + * @private + * @param {Array} [array] The array to iterate over. + * @param {Function} iteratee The function invoked per iteration. + * @returns {Array} Returns `array`. + */ + function arrayEach(array, iteratee) { + var index = -1, + length = array == null ? 0 : array.length; + + while (++index < length) { + if (iteratee(array[index], index, array) === false) { + break; + } + } + return array; + } + + /** + * A specialized version of `_.forEachRight` for arrays without support for + * iteratee shorthands. + * + * @private + * @param {Array} [array] The array to iterate over. + * @param {Function} iteratee The function invoked per iteration. + * @returns {Array} Returns `array`. + */ + function arrayEachRight(array, iteratee) { + var length = array == null ? 0 : array.length; + + while (length--) { + if (iteratee(array[length], length, array) === false) { + break; + } + } + return array; + } + + /** + * A specialized version of `_.every` for arrays without support for + * iteratee shorthands. + * + * @private + * @param {Array} [array] The array to iterate over. + * @param {Function} predicate The function invoked per iteration. + * @returns {boolean} Returns `true` if all elements pass the predicate check, + * else `false`. + */ + function arrayEvery(array, predicate) { + var index = -1, + length = array == null ? 0 : array.length; + + while (++index < length) { + if (!predicate(array[index], index, array)) { + return false; + } + } + return true; + } + + /** + * A specialized version of `_.filter` for arrays without support for + * iteratee shorthands. + * + * @private + * @param {Array} [array] The array to iterate over. + * @param {Function} predicate The function invoked per iteration. + * @returns {Array} Returns the new filtered array. + */ + function arrayFilter(array, predicate) { + var index = -1, + length = array == null ? 0 : array.length, + resIndex = 0, + result = []; + + while (++index < length) { + var value = array[index]; + if (predicate(value, index, array)) { + result[resIndex++] = value; + } + } + return result; + } + + /** + * A specialized version of `_.includes` for arrays without support for + * specifying an index to search from. + * + * @private + * @param {Array} [array] The array to inspect. + * @param {*} target The value to search for. + * @returns {boolean} Returns `true` if `target` is found, else `false`. + */ + function arrayIncludes(array, value) { + var length = array == null ? 0 : array.length; + return !!length && baseIndexOf(array, value, 0) > -1; + } + + /** + * This function is like `arrayIncludes` except that it accepts a comparator. + * + * @private + * @param {Array} [array] The array to inspect. + * @param {*} target The value to search for. + * @param {Function} comparator The comparator invoked per element. + * @returns {boolean} Returns `true` if `target` is found, else `false`. + */ + function arrayIncludesWith(array, value, comparator) { + var index = -1, + length = array == null ? 0 : array.length; + + while (++index < length) { + if (comparator(value, array[index])) { + return true; + } + } + return false; + } + + /** + * A specialized version of `_.map` for arrays without support for iteratee + * shorthands. + * + * @private + * @param {Array} [array] The array to iterate over. + * @param {Function} iteratee The function invoked per iteration. + * @returns {Array} Returns the new mapped array. + */ + function arrayMap(array, iteratee) { + var index = -1, + length = array == null ? 0 : array.length, + result = Array(length); + + while (++index < length) { + result[index] = iteratee(array[index], index, array); + } + return result; + } + + /** + * Appends the elements of `values` to `array`. + * + * @private + * @param {Array} array The array to modify. + * @param {Array} values The values to append. + * @returns {Array} Returns `array`. + */ + function arrayPush(array, values) { + var index = -1, + length = values.length, + offset = array.length; + + while (++index < length) { + array[offset + index] = values[index]; + } + return array; + } + + /** + * A specialized version of `_.reduce` for arrays without support for + * iteratee shorthands. + * + * @private + * @param {Array} [array] The array to iterate over. + * @param {Function} iteratee The function invoked per iteration. + * @param {*} [accumulator] The initial value. + * @param {boolean} [initAccum] Specify using the first element of `array` as + * the initial value. + * @returns {*} Returns the accumulated value. + */ + function arrayReduce(array, iteratee, accumulator, initAccum) { + var index = -1, + length = array == null ? 0 : array.length; + + if (initAccum && length) { + accumulator = array[++index]; + } + while (++index < length) { + accumulator = iteratee(accumulator, array[index], index, array); + } + return accumulator; + } + + /** + * A specialized version of `_.reduceRight` for arrays without support for + * iteratee shorthands. + * + * @private + * @param {Array} [array] The array to iterate over. + * @param {Function} iteratee The function invoked per iteration. + * @param {*} [accumulator] The initial value. + * @param {boolean} [initAccum] Specify using the last element of `array` as + * the initial value. + * @returns {*} Returns the accumulated value. + */ + function arrayReduceRight(array, iteratee, accumulator, initAccum) { + var length = array == null ? 0 : array.length; + if (initAccum && length) { + accumulator = array[--length]; + } + while (length--) { + accumulator = iteratee(accumulator, array[length], length, array); + } + return accumulator; + } + + /** + * A specialized version of `_.some` for arrays without support for iteratee + * shorthands. + * + * @private + * @param {Array} [array] The array to iterate over. + * @param {Function} predicate The function invoked per iteration. + * @returns {boolean} Returns `true` if any element passes the predicate check, + * else `false`. + */ + function arraySome(array, predicate) { + var index = -1, + length = array == null ? 0 : array.length; + + while (++index < length) { + if (predicate(array[index], index, array)) { + return true; + } + } + return false; + } + + /** + * Gets the size of an ASCII `string`. + * + * @private + * @param {string} string The string inspect. + * @returns {number} Returns the string size. + */ + var asciiSize = baseProperty('length'); + + /** + * Converts an ASCII `string` to an array. + * + * @private + * @param {string} string The string to convert. + * @returns {Array} Returns the converted array. + */ + function asciiToArray(string) { + return string.split(''); + } + + /** + * Splits an ASCII `string` into an array of its words. + * + * @private + * @param {string} The string to inspect. + * @returns {Array} Returns the words of `string`. + */ + function asciiWords(string) { + return string.match(reAsciiWord) || []; + } + + /** + * The base implementation of methods like `_.findKey` and `_.findLastKey`, + * without support for iteratee shorthands, which iterates over `collection` + * using `eachFunc`. + * + * @private + * @param {Array|Object} collection The collection to inspect. + * @param {Function} predicate The function invoked per iteration. + * @param {Function} eachFunc The function to iterate over `collection`. + * @returns {*} Returns the found element or its key, else `undefined`. + */ + function baseFindKey(collection, predicate, eachFunc) { + var result; + eachFunc(collection, function(value, key, collection) { + if (predicate(value, key, collection)) { + result = key; + return false; + } + }); + return result; + } + + /** + * The base implementation of `_.findIndex` and `_.findLastIndex` without + * support for iteratee shorthands. + * + * @private + * @param {Array} array The array to inspect. + * @param {Function} predicate The function invoked per iteration. + * @param {number} fromIndex The index to search from. + * @param {boolean} [fromRight] Specify iterating from right to left. + * @returns {number} Returns the index of the matched value, else `-1`. + */ + function baseFindIndex(array, predicate, fromIndex, fromRight) { + var length = array.length, + index = fromIndex + (fromRight ? 1 : -1); + + while ((fromRight ? index-- : ++index < length)) { + if (predicate(array[index], index, array)) { + return index; + } + } + return -1; + } + + /** + * The base implementation of `_.indexOf` without `fromIndex` bounds checks. + * + * @private + * @param {Array} array The array to inspect. + * @param {*} value The value to search for. + * @param {number} fromIndex The index to search from. + * @returns {number} Returns the index of the matched value, else `-1`. + */ + function baseIndexOf(array, value, fromIndex) { + return value === value + ? strictIndexOf(array, value, fromIndex) + : baseFindIndex(array, baseIsNaN, fromIndex); + } + + /** + * This function is like `baseIndexOf` except that it accepts a comparator. + * + * @private + * @param {Array} array The array to inspect. + * @param {*} value The value to search for. + * @param {number} fromIndex The index to search from. + * @param {Function} comparator The comparator invoked per element. + * @returns {number} Returns the index of the matched value, else `-1`. + */ + function baseIndexOfWith(array, value, fromIndex, comparator) { + var index = fromIndex - 1, + length = array.length; + + while (++index < length) { + if (comparator(array[index], value)) { + return index; + } + } + return -1; + } + + /** + * The base implementation of `_.isNaN` without support for number objects. + * + * @private + * @param {*} value The value to check. + * @returns {boolean} Returns `true` if `value` is `NaN`, else `false`. + */ + function baseIsNaN(value) { + return value !== value; + } + + /** + * The base implementation of `_.mean` and `_.meanBy` without support for + * iteratee shorthands. + * + * @private + * @param {Array} array The array to iterate over. + * @param {Function} iteratee The function invoked per iteration. + * @returns {number} Returns the mean. + */ + function baseMean(array, iteratee) { + var length = array == null ? 0 : array.length; + return length ? (baseSum(array, iteratee) / length) : NAN; + } + + /** + * The base implementation of `_.property` without support for deep paths. + * + * @private + * @param {string} key The key of the property to get. + * @returns {Function} Returns the new accessor function. + */ + function baseProperty(key) { + return function(object) { + return object == null ? undefined : object[key]; + }; + } + + /** + * The base implementation of `_.propertyOf` without support for deep paths. + * + * @private + * @param {Object} object The object to query. + * @returns {Function} Returns the new accessor function. + */ + function basePropertyOf(object) { + return function(key) { + return object == null ? undefined : object[key]; + }; + } + + /** + * The base implementation of `_.reduce` and `_.reduceRight`, without support + * for iteratee shorthands, which iterates over `collection` using `eachFunc`. + * + * @private + * @param {Array|Object} collection The collection to iterate over. + * @param {Function} iteratee The function invoked per iteration. + * @param {*} accumulator The initial value. + * @param {boolean} initAccum Specify using the first or last element of + * `collection` as the initial value. + * @param {Function} eachFunc The function to iterate over `collection`. + * @returns {*} Returns the accumulated value. + */ + function baseReduce(collection, iteratee, accumulator, initAccum, eachFunc) { + eachFunc(collection, function(value, index, collection) { + accumulator = initAccum + ? (initAccum = false, value) + : iteratee(accumulator, value, index, collection); + }); + return accumulator; + } + + /** + * The base implementation of `_.sortBy` which uses `comparer` to define the + * sort order of `array` and replaces criteria objects with their corresponding + * values. + * + * @private + * @param {Array} array The array to sort. + * @param {Function} comparer The function to define sort order. + * @returns {Array} Returns `array`. + */ + function baseSortBy(array, comparer) { + var length = array.length; + + array.sort(comparer); + while (length--) { + array[length] = array[length].value; + } + return array; + } + + /** + * The base implementation of `_.sum` and `_.sumBy` without support for + * iteratee shorthands. + * + * @private + * @param {Array} array The array to iterate over. + * @param {Function} iteratee The function invoked per iteration. + * @returns {number} Returns the sum. + */ + function baseSum(array, iteratee) { + var result, + index = -1, + length = array.length; + + while (++index < length) { + var current = iteratee(array[index]); + if (current !== undefined) { + result = result === undefined ? current : (result + current); + } + } + return result; + } + + /** + * The base implementation of `_.times` without support for iteratee shorthands + * or max array length checks. + * + * @private + * @param {number} n The number of times to invoke `iteratee`. + * @param {Function} iteratee The function invoked per iteration. + * @returns {Array} Returns the array of results. + */ + function baseTimes(n, iteratee) { + var index = -1, + result = Array(n); + + while (++index < n) { + result[index] = iteratee(index); + } + return result; + } + + /** + * The base implementation of `_.toPairs` and `_.toPairsIn` which creates an array + * of key-value pairs for `object` corresponding to the property names of `props`. + * + * @private + * @param {Object} object The object to query. + * @param {Array} props The property names to get values for. + * @returns {Object} Returns the key-value pairs. + */ + function baseToPairs(object, props) { + return arrayMap(props, function(key) { + return [key, object[key]]; + }); + } + + /** + * The base implementation of `_.unary` without support for storing metadata. + * + * @private + * @param {Function} func The function to cap arguments for. + * @returns {Function} Returns the new capped function. + */ + function baseUnary(func) { + return function(value) { + return func(value); + }; + } + + /** + * The base implementation of `_.values` and `_.valuesIn` which creates an + * array of `object` property values corresponding to the property names + * of `props`. + * + * @private + * @param {Object} object The object to query. + * @param {Array} props The property names to get values for. + * @returns {Object} Returns the array of property values. + */ + function baseValues(object, props) { + return arrayMap(props, function(key) { + return object[key]; + }); + } + + /** + * Checks if a `cache` value for `key` exists. + * + * @private + * @param {Object} cache The cache to query. + * @param {string} key The key of the entry to check. + * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`. + */ + function cacheHas(cache, key) { + return cache.has(key); + } + + /** + * Used by `_.trim` and `_.trimStart` to get the index of the first string symbol + * that is not found in the character symbols. + * + * @private + * @param {Array} strSymbols The string symbols to inspect. + * @param {Array} chrSymbols The character symbols to find. + * @returns {number} Returns the index of the first unmatched string symbol. + */ + function charsStartIndex(strSymbols, chrSymbols) { + var index = -1, + length = strSymbols.length; + + while (++index < length && baseIndexOf(chrSymbols, strSymbols[index], 0) > -1) {} + return index; + } + + /** + * Used by `_.trim` and `_.trimEnd` to get the index of the last string symbol + * that is not found in the character symbols. + * + * @private + * @param {Array} strSymbols The string symbols to inspect. + * @param {Array} chrSymbols The character symbols to find. + * @returns {number} Returns the index of the last unmatched string symbol. + */ + function charsEndIndex(strSymbols, chrSymbols) { + var index = strSymbols.length; + + while (index-- && baseIndexOf(chrSymbols, strSymbols[index], 0) > -1) {} + return index; + } + + /** + * Gets the number of `placeholder` occurrences in `array`. + * + * @private + * @param {Array} array The array to inspect. + * @param {*} placeholder The placeholder to search for. + * @returns {number} Returns the placeholder count. + */ + function countHolders(array, placeholder) { + var length = array.length, + result = 0; + + while (length--) { + if (array[length] === placeholder) { + ++result; + } + } + return result; + } + + /** + * Used by `_.deburr` to convert Latin-1 Supplement and Latin Extended-A + * letters to basic Latin letters. + * + * @private + * @param {string} letter The matched letter to deburr. + * @returns {string} Returns the deburred letter. + */ + var deburrLetter = basePropertyOf(deburredLetters); + + /** + * Used by `_.escape` to convert characters to HTML entities. + * + * @private + * @param {string} chr The matched character to escape. + * @returns {string} Returns the escaped character. + */ + var escapeHtmlChar = basePropertyOf(htmlEscapes); + + /** + * Used by `_.template` to escape characters for inclusion in compiled string literals. + * + * @private + * @param {string} chr The matched character to escape. + * @returns {string} Returns the escaped character. + */ + function escapeStringChar(chr) { + return '\\' + stringEscapes[chr]; + } + + /** + * Gets the value at `key` of `object`. + * + * @private + * @param {Object} [object] The object to query. + * @param {string} key The key of the property to get. + * @returns {*} Returns the property value. + */ + function getValue(object, key) { + return object == null ? undefined : object[key]; + } + + /** + * Checks if `string` contains Unicode symbols. + * + * @private + * @param {string} string The string to inspect. + * @returns {boolean} Returns `true` if a symbol is found, else `false`. + */ + function hasUnicode(string) { + return reHasUnicode.test(string); + } + + /** + * Checks if `string` contains a word composed of Unicode symbols. + * + * @private + * @param {string} string The string to inspect. + * @returns {boolean} Returns `true` if a word is found, else `false`. + */ + function hasUnicodeWord(string) { + return reHasUnicodeWord.test(string); + } + + /** + * Converts `iterator` to an array. + * + * @private + * @param {Object} iterator The iterator to convert. + * @returns {Array} Returns the converted array. + */ + function iteratorToArray(iterator) { + var data, + result = []; + + while (!(data = iterator.next()).done) { + result.push(data.value); + } + return result; + } + + /** + * Converts `map` to its key-value pairs. + * + * @private + * @param {Object} map The map to convert. + * @returns {Array} Returns the key-value pairs. + */ + function mapToArray(map) { + var index = -1, + result = Array(map.size); + + map.forEach(function(value, key) { + result[++index] = [key, value]; + }); + return result; + } + + /** + * Creates a unary function that invokes `func` with its argument transformed. + * + * @private + * @param {Function} func The function to wrap. + * @param {Function} transform The argument transform. + * @returns {Function} Returns the new function. + */ + function overArg(func, transform) { + return function(arg) { + return func(transform(arg)); + }; + } + + /** + * Replaces all `placeholder` elements in `array` with an internal placeholder + * and returns an array of their indexes. + * + * @private + * @param {Array} array The array to modify. + * @param {*} placeholder The placeholder to replace. + * @returns {Array} Returns the new array of placeholder indexes. + */ + function replaceHolders(array, placeholder) { + var index = -1, + length = array.length, + resIndex = 0, + result = []; + + while (++index < length) { + var value = array[index]; + if (value === placeholder || value === PLACEHOLDER) { + array[index] = PLACEHOLDER; + result[resIndex++] = index; + } + } + return result; + } + + /** + * Converts `set` to an array of its values. + * + * @private + * @param {Object} set The set to convert. + * @returns {Array} Returns the values. + */ + function setToArray(set) { + var index = -1, + result = Array(set.size); + + set.forEach(function(value) { + result[++index] = value; + }); + return result; + } + + /** + * Converts `set` to its value-value pairs. + * + * @private + * @param {Object} set The set to convert. + * @returns {Array} Returns the value-value pairs. + */ + function setToPairs(set) { + var index = -1, + result = Array(set.size); + + set.forEach(function(value) { + result[++index] = [value, value]; + }); + return result; + } + + /** + * A specialized version of `_.indexOf` which performs strict equality + * comparisons of values, i.e. `===`. + * + * @private + * @param {Array} array The array to inspect. + * @param {*} value The value to search for. + * @param {number} fromIndex The index to search from. + * @returns {number} Returns the index of the matched value, else `-1`. + */ + function strictIndexOf(array, value, fromIndex) { + var index = fromIndex - 1, + length = array.length; + + while (++index < length) { + if (array[index] === value) { + return index; + } + } + return -1; + } + + /** + * A specialized version of `_.lastIndexOf` which performs strict equality + * comparisons of values, i.e. `===`. + * + * @private + * @param {Array} array The array to inspect. + * @param {*} value The value to search for. + * @param {number} fromIndex The index to search from. + * @returns {number} Returns the index of the matched value, else `-1`. + */ + function strictLastIndexOf(array, value, fromIndex) { + var index = fromIndex + 1; + while (index--) { + if (array[index] === value) { + return index; + } + } + return index; + } + + /** + * Gets the number of symbols in `string`. + * + * @private + * @param {string} string The string to inspect. + * @returns {number} Returns the string size. + */ + function stringSize(string) { + return hasUnicode(string) + ? unicodeSize(string) + : asciiSize(string); + } + + /** + * Converts `string` to an array. + * + * @private + * @param {string} string The string to convert. + * @returns {Array} Returns the converted array. + */ + function stringToArray(string) { + return hasUnicode(string) + ? unicodeToArray(string) + : asciiToArray(string); + } + + /** + * Used by `_.unescape` to convert HTML entities to characters. + * + * @private + * @param {string} chr The matched character to unescape. + * @returns {string} Returns the unescaped character. + */ + var unescapeHtmlChar = basePropertyOf(htmlUnescapes); + + /** + * Gets the size of a Unicode `string`. + * + * @private + * @param {string} string The string inspect. + * @returns {number} Returns the string size. + */ + function unicodeSize(string) { + var result = reUnicode.lastIndex = 0; + while (reUnicode.test(string)) { + ++result; + } + return result; + } + + /** + * Converts a Unicode `string` to an array. + * + * @private + * @param {string} string The string to convert. + * @returns {Array} Returns the converted array. + */ + function unicodeToArray(string) { + return string.match(reUnicode) || []; + } + + /** + * Splits a Unicode `string` into an array of its words. + * + * @private + * @param {string} The string to inspect. + * @returns {Array} Returns the words of `string`. + */ + function unicodeWords(string) { + return string.match(reUnicodeWord) || []; + } + + /*--------------------------------------------------------------------------*/ + + /** + * Create a new pristine `lodash` function using the `context` object. + * + * @static + * @memberOf _ + * @since 1.1.0 + * @category Util + * @param {Object} [context=root] The context object. + * @returns {Function} Returns a new `lodash` function. + * @example + * + * _.mixin({ 'foo': _.constant('foo') }); + * + * var lodash = _.runInContext(); + * lodash.mixin({ 'bar': lodash.constant('bar') }); + * + * _.isFunction(_.foo); + * // => true + * _.isFunction(_.bar); + * // => false + * + * lodash.isFunction(lodash.foo); + * // => false + * lodash.isFunction(lodash.bar); + * // => true + * + * // Create a suped-up `defer` in Node.js. + * var defer = _.runInContext({ 'setTimeout': setImmediate }).defer; + */ + var runInContext = (function runInContext(context) { + context = context == null ? root : _.defaults(root.Object(), context, _.pick(root, contextProps)); + + /** Built-in constructor references. */ + var Array = context.Array, + Date = context.Date, + Error = context.Error, + Function = context.Function, + Math = context.Math, + Object = context.Object, + RegExp = context.RegExp, + String = context.String, + TypeError = context.TypeError; + + /** Used for built-in method references. */ + var arrayProto = Array.prototype, + funcProto = Function.prototype, + objectProto = Object.prototype; + + /** Used to detect overreaching core-js shims. */ + var coreJsData = context['__core-js_shared__']; + + /** Used to resolve the decompiled source of functions. */ + var funcToString = funcProto.toString; + + /** Used to check objects for own properties. */ + var hasOwnProperty = objectProto.hasOwnProperty; + + /** Used to generate unique IDs. */ + var idCounter = 0; + + /** Used to detect methods masquerading as native. */ + var maskSrcKey = (function() { + var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || ''); + return uid ? ('Symbol(src)_1.' + uid) : ''; + }()); + + /** + * Used to resolve the + * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring) + * of values. + */ + var nativeObjectToString = objectProto.toString; + + /** Used to infer the `Object` constructor. */ + var objectCtorString = funcToString.call(Object); + + /** Used to restore the original `_` reference in `_.noConflict`. */ + var oldDash = root._; + + /** Used to detect if a method is native. */ + var reIsNative = RegExp('^' + + funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&') + .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$' + ); + + /** Built-in value references. */ + var Buffer = moduleExports ? context.Buffer : undefined, + Symbol = context.Symbol, + Uint8Array = context.Uint8Array, + allocUnsafe = Buffer ? Buffer.allocUnsafe : undefined, + getPrototype = overArg(Object.getPrototypeOf, Object), + objectCreate = Object.create, + propertyIsEnumerable = objectProto.propertyIsEnumerable, + splice = arrayProto.splice, + spreadableSymbol = Symbol ? Symbol.isConcatSpreadable : undefined, + symIterator = Symbol ? Symbol.iterator : undefined, + symToStringTag = Symbol ? Symbol.toStringTag : undefined; + + var defineProperty = (function() { + try { + var func = getNative(Object, 'defineProperty'); + func({}, '', {}); + return func; + } catch (e) {} + }()); + + /** Mocked built-ins. */ + var ctxClearTimeout = context.clearTimeout !== root.clearTimeout && context.clearTimeout, + ctxNow = Date && Date.now !== root.Date.now && Date.now, + ctxSetTimeout = context.setTimeout !== root.setTimeout && context.setTimeout; + + /* Built-in method references for those with the same name as other `lodash` methods. */ + var nativeCeil = Math.ceil, + nativeFloor = Math.floor, + nativeGetSymbols = Object.getOwnPropertySymbols, + nativeIsBuffer = Buffer ? Buffer.isBuffer : undefined, + nativeIsFinite = context.isFinite, + nativeJoin = arrayProto.join, + nativeKeys = overArg(Object.keys, Object), + nativeMax = Math.max, + nativeMin = Math.min, + nativeNow = Date.now, + nativeParseInt = context.parseInt, + nativeRandom = Math.random, + nativeReverse = arrayProto.reverse; + + /* Built-in method references that are verified to be native. */ + var DataView = getNative(context, 'DataView'), + Map = getNative(context, 'Map'), + Promise = getNative(context, 'Promise'), + Set = getNative(context, 'Set'), + WeakMap = getNative(context, 'WeakMap'), + nativeCreate = getNative(Object, 'create'); + + /** Used to store function metadata. */ + var metaMap = WeakMap && new WeakMap; + + /** Used to lookup unminified function names. */ + var realNames = {}; + + /** Used to detect maps, sets, and weakmaps. */ + var dataViewCtorString = toSource(DataView), + mapCtorString = toSource(Map), + promiseCtorString = toSource(Promise), + setCtorString = toSource(Set), + weakMapCtorString = toSource(WeakMap); + + /** Used to convert symbols to primitives and strings. */ + var symbolProto = Symbol ? Symbol.prototype : undefined, + symbolValueOf = symbolProto ? symbolProto.valueOf : undefined, + symbolToString = symbolProto ? symbolProto.toString : undefined; + + /*------------------------------------------------------------------------*/ + + /** + * Creates a `lodash` object which wraps `value` to enable implicit method + * chain sequences. Methods that operate on and return arrays, collections, + * and functions can be chained together. Methods that retrieve a single value + * or may return a primitive value will automatically end the chain sequence + * and return the unwrapped value. Otherwise, the value must be unwrapped + * with `_#value`. + * + * Explicit chain sequences, which must be unwrapped with `_#value`, may be + * enabled using `_.chain`. + * + * The execution of chained methods is lazy, that is, it's deferred until + * `_#value` is implicitly or explicitly called. + * + * Lazy evaluation allows several methods to support shortcut fusion. + * Shortcut fusion is an optimization to merge iteratee calls; this avoids + * the creation of intermediate arrays and can greatly reduce the number of + * iteratee executions. Sections of a chain sequence qualify for shortcut + * fusion if the section is applied to an array and iteratees accept only + * one argument. The heuristic for whether a section qualifies for shortcut + * fusion is subject to change. + * + * Chaining is supported in custom builds as long as the `_#value` method is + * directly or indirectly included in the build. + * + * In addition to lodash methods, wrappers have `Array` and `String` methods. + * + * The wrapper `Array` methods are: + * `concat`, `join`, `pop`, `push`, `shift`, `sort`, `splice`, and `unshift` + * + * The wrapper `String` methods are: + * `replace` and `split` + * + * The wrapper methods that support shortcut fusion are: + * `at`, `compact`, `drop`, `dropRight`, `dropWhile`, `filter`, `find`, + * `findLast`, `head`, `initial`, `last`, `map`, `reject`, `reverse`, `slice`, + * `tail`, `take`, `takeRight`, `takeRightWhile`, `takeWhile`, and `toArray` + * + * The chainable wrapper methods are: + * `after`, `ary`, `assign`, `assignIn`, `assignInWith`, `assignWith`, `at`, + * `before`, `bind`, `bindAll`, `bindKey`, `castArray`, `chain`, `chunk`, + * `commit`, `compact`, `concat`, `conforms`, `constant`, `countBy`, `create`, + * `curry`, `debounce`, `defaults`, `defaultsDeep`, `defer`, `delay`, + * `difference`, `differenceBy`, `differenceWith`, `drop`, `dropRight`, + * `dropRightWhile`, `dropWhile`, `extend`, `extendWith`, `fill`, `filter`, + * `flatMap`, `flatMapDeep`, `flatMapDepth`, `flatten`, `flattenDeep`, + * `flattenDepth`, `flip`, `flow`, `flowRight`, `fromPairs`, `functions`, + * `functionsIn`, `groupBy`, `initial`, `intersection`, `intersectionBy`, + * `intersectionWith`, `invert`, `invertBy`, `invokeMap`, `iteratee`, `keyBy`, + * `keys`, `keysIn`, `map`, `mapKeys`, `mapValues`, `matches`, `matchesProperty`, + * `memoize`, `merge`, `mergeWith`, `method`, `methodOf`, `mixin`, `negate`, + * `nthArg`, `omit`, `omitBy`, `once`, `orderBy`, `over`, `overArgs`, + * `overEvery`, `overSome`, `partial`, `partialRight`, `partition`, `pick`, + * `pickBy`, `plant`, `property`, `propertyOf`, `pull`, `pullAll`, `pullAllBy`, + * `pullAllWith`, `pullAt`, `push`, `range`, `rangeRight`, `rearg`, `reject`, + * `remove`, `rest`, `reverse`, `sampleSize`, `set`, `setWith`, `shuffle`, + * `slice`, `sort`, `sortBy`, `splice`, `spread`, `tail`, `take`, `takeRight`, + * `takeRightWhile`, `takeWhile`, `tap`, `throttle`, `thru`, `toArray`, + * `toPairs`, `toPairsIn`, `toPath`, `toPlainObject`, `transform`, `unary`, + * `union`, `unionBy`, `unionWith`, `uniq`, `uniqBy`, `uniqWith`, `unset`, + * `unshift`, `unzip`, `unzipWith`, `update`, `updateWith`, `values`, + * `valuesIn`, `without`, `wrap`, `xor`, `xorBy`, `xorWith`, `zip`, + * `zipObject`, `zipObjectDeep`, and `zipWith` + * + * The wrapper methods that are **not** chainable by default are: + * `add`, `attempt`, `camelCase`, `capitalize`, `ceil`, `clamp`, `clone`, + * `cloneDeep`, `cloneDeepWith`, `cloneWith`, `conformsTo`, `deburr`, + * `defaultTo`, `divide`, `each`, `eachRight`, `endsWith`, `eq`, `escape`, + * `escapeRegExp`, `every`, `find`, `findIndex`, `findKey`, `findLast`, + * `findLastIndex`, `findLastKey`, `first`, `floor`, `forEach`, `forEachRight`, + * `forIn`, `forInRight`, `forOwn`, `forOwnRight`, `get`, `gt`, `gte`, `has`, + * `hasIn`, `head`, `identity`, `includes`, `indexOf`, `inRange`, `invoke`, + * `isArguments`, `isArray`, `isArrayBuffer`, `isArrayLike`, `isArrayLikeObject`, + * `isBoolean`, `isBuffer`, `isDate`, `isElement`, `isEmpty`, `isEqual`, + * `isEqualWith`, `isError`, `isFinite`, `isFunction`, `isInteger`, `isLength`, + * `isMap`, `isMatch`, `isMatchWith`, `isNaN`, `isNative`, `isNil`, `isNull`, + * `isNumber`, `isObject`, `isObjectLike`, `isPlainObject`, `isRegExp`, + * `isSafeInteger`, `isSet`, `isString`, `isUndefined`, `isTypedArray`, + * `isWeakMap`, `isWeakSet`, `join`, `kebabCase`, `last`, `lastIndexOf`, + * `lowerCase`, `lowerFirst`, `lt`, `lte`, `max`, `maxBy`, `mean`, `meanBy`, + * `min`, `minBy`, `multiply`, `noConflict`, `noop`, `now`, `nth`, `pad`, + * `padEnd`, `padStart`, `parseInt`, `pop`, `random`, `reduce`, `reduceRight`, + * `repeat`, `result`, `round`, `runInContext`, `sample`, `shift`, `size`, + * `snakeCase`, `some`, `sortedIndex`, `sortedIndexBy`, `sortedLastIndex`, + * `sortedLastIndexBy`, `startCase`, `startsWith`, `stubArray`, `stubFalse`, + * `stubObject`, `stubString`, `stubTrue`, `subtract`, `sum`, `sumBy`, + * `template`, `times`, `toFinite`, `toInteger`, `toJSON`, `toLength`, + * `toLower`, `toNumber`, `toSafeInteger`, `toString`, `toUpper`, `trim`, + * `trimEnd`, `trimStart`, `truncate`, `unescape`, `uniqueId`, `upperCase`, + * `upperFirst`, `value`, and `words` + * + * @name _ + * @constructor + * @category Seq + * @param {*} value The value to wrap in a `lodash` instance. + * @returns {Object} Returns the new `lodash` wrapper instance. + * @example + * + * function square(n) { + * return n * n; + * } + * + * var wrapped = _([1, 2, 3]); + * + * // Returns an unwrapped value. + * wrapped.reduce(_.add); + * // => 6 + * + * // Returns a wrapped value. + * var squares = wrapped.map(square); + * + * _.isArray(squares); + * // => false + * + * _.isArray(squares.value()); + * // => true + */ + function lodash(value) { + if (isObjectLike(value) && !isArray(value) && !(value instanceof LazyWrapper)) { + if (value instanceof LodashWrapper) { + return value; + } + if (hasOwnProperty.call(value, '__wrapped__')) { + return wrapperClone(value); + } + } + return new LodashWrapper(value); + } + + /** + * The base implementation of `_.create` without support for assigning + * properties to the created object. + * + * @private + * @param {Object} proto The object to inherit from. + * @returns {Object} Returns the new object. + */ + var baseCreate = (function() { + function object() {} + return function(proto) { + if (!isObject(proto)) { + return {}; + } + if (objectCreate) { + return objectCreate(proto); + } + object.prototype = proto; + var result = new object; + object.prototype = undefined; + return result; + }; + }()); + + /** + * The function whose prototype chain sequence wrappers inherit from. + * + * @private + */ + function baseLodash() { + // No operation performed. + } + + /** + * The base constructor for creating `lodash` wrapper objects. + * + * @private + * @param {*} value The value to wrap. + * @param {boolean} [chainAll] Enable explicit method chain sequences. + */ + function LodashWrapper(value, chainAll) { + this.__wrapped__ = value; + this.__actions__ = []; + this.__chain__ = !!chainAll; + this.__index__ = 0; + this.__values__ = undefined; + } + + /** + * By default, the template delimiters used by lodash are like those in + * embedded Ruby (ERB) as well as ES2015 template strings. Change the + * following template settings to use alternative delimiters. + * + * @static + * @memberOf _ + * @type {Object} + */ + lodash.templateSettings = { + + /** + * Used to detect `data` property values to be HTML-escaped. + * + * @memberOf _.templateSettings + * @type {RegExp} + */ + 'escape': reEscape, + + /** + * Used to detect code to be evaluated. + * + * @memberOf _.templateSettings + * @type {RegExp} + */ + 'evaluate': reEvaluate, + + /** + * Used to detect `data` property values to inject. + * + * @memberOf _.templateSettings + * @type {RegExp} + */ + 'interpolate': reInterpolate, + + /** + * Used to reference the data object in the template text. + * + * @memberOf _.templateSettings + * @type {string} + */ + 'variable': '', + + /** + * Used to import variables into the compiled template. + * + * @memberOf _.templateSettings + * @type {Object} + */ + 'imports': { + + /** + * A reference to the `lodash` function. + * + * @memberOf _.templateSettings.imports + * @type {Function} + */ + '_': lodash + } + }; + + // Ensure wrappers are instances of `baseLodash`. + lodash.prototype = baseLodash.prototype; + lodash.prototype.constructor = lodash; + + LodashWrapper.prototype = baseCreate(baseLodash.prototype); + LodashWrapper.prototype.constructor = LodashWrapper; + + /*------------------------------------------------------------------------*/ + + /** + * Creates a lazy wrapper object which wraps `value` to enable lazy evaluation. + * + * @private + * @constructor + * @param {*} value The value to wrap. + */ + function LazyWrapper(value) { + this.__wrapped__ = value; + this.__actions__ = []; + this.__dir__ = 1; + this.__filtered__ = false; + this.__iteratees__ = []; + this.__takeCount__ = MAX_ARRAY_LENGTH; + this.__views__ = []; + } + + /** + * Creates a clone of the lazy wrapper object. + * + * @private + * @name clone + * @memberOf LazyWrapper + * @returns {Object} Returns the cloned `LazyWrapper` object. + */ + function lazyClone() { + var result = new LazyWrapper(this.__wrapped__); + result.__actions__ = copyArray(this.__actions__); + result.__dir__ = this.__dir__; + result.__filtered__ = this.__filtered__; + result.__iteratees__ = copyArray(this.__iteratees__); + result.__takeCount__ = this.__takeCount__; + result.__views__ = copyArray(this.__views__); + return result; + } + + /** + * Reverses the direction of lazy iteration. + * + * @private + * @name reverse + * @memberOf LazyWrapper + * @returns {Object} Returns the new reversed `LazyWrapper` object. + */ + function lazyReverse() { + if (this.__filtered__) { + var result = new LazyWrapper(this); + result.__dir__ = -1; + result.__filtered__ = true; + } else { + result = this.clone(); + result.__dir__ *= -1; + } + return result; + } + + /** + * Extracts the unwrapped value from its lazy wrapper. + * + * @private + * @name value + * @memberOf LazyWrapper + * @returns {*} Returns the unwrapped value. + */ + function lazyValue() { + var array = this.__wrapped__.value(), + dir = this.__dir__, + isArr = isArray(array), + isRight = dir < 0, + arrLength = isArr ? array.length : 0, + view = getView(0, arrLength, this.__views__), + start = view.start, + end = view.end, + length = end - start, + index = isRight ? end : (start - 1), + iteratees = this.__iteratees__, + iterLength = iteratees.length, + resIndex = 0, + takeCount = nativeMin(length, this.__takeCount__); + + if (!isArr || (!isRight && arrLength == length && takeCount == length)) { + return baseWrapperValue(array, this.__actions__); + } + var result = []; + + outer: + while (length-- && resIndex < takeCount) { + index += dir; + + var iterIndex = -1, + value = array[index]; + + while (++iterIndex < iterLength) { + var data = iteratees[iterIndex], + iteratee = data.iteratee, + type = data.type, + computed = iteratee(value); + + if (type == LAZY_MAP_FLAG) { + value = computed; + } else if (!computed) { + if (type == LAZY_FILTER_FLAG) { + continue outer; + } else { + break outer; + } + } + } + result[resIndex++] = value; + } + return result; + } + + // Ensure `LazyWrapper` is an instance of `baseLodash`. + LazyWrapper.prototype = baseCreate(baseLodash.prototype); + LazyWrapper.prototype.constructor = LazyWrapper; + + /*------------------------------------------------------------------------*/ + + /** + * Creates a hash object. + * + * @private + * @constructor + * @param {Array} [entries] The key-value pairs to cache. + */ + function Hash(entries) { + var index = -1, + length = entries == null ? 0 : entries.length; + + this.clear(); + while (++index < length) { + var entry = entries[index]; + this.set(entry[0], entry[1]); + } + } + + /** + * Removes all key-value entries from the hash. + * + * @private + * @name clear + * @memberOf Hash + */ + function hashClear() { + this.__data__ = nativeCreate ? nativeCreate(null) : {}; + this.size = 0; + } + + /** + * Removes `key` and its value from the hash. + * + * @private + * @name delete + * @memberOf Hash + * @param {Object} hash The hash to modify. + * @param {string} key The key of the value to remove. + * @returns {boolean} Returns `true` if the entry was removed, else `false`. + */ + function hashDelete(key) { + var result = this.has(key) && delete this.__data__[key]; + this.size -= result ? 1 : 0; + return result; + } + + /** + * Gets the hash value for `key`. + * + * @private + * @name get + * @memberOf Hash + * @param {string} key The key of the value to get. + * @returns {*} Returns the entry value. + */ + function hashGet(key) { + var data = this.__data__; + if (nativeCreate) { + var result = data[key]; + return result === HASH_UNDEFINED ? undefined : result; + } + return hasOwnProperty.call(data, key) ? data[key] : undefined; + } + + /** + * Checks if a hash value for `key` exists. + * + * @private + * @name has + * @memberOf Hash + * @param {string} key The key of the entry to check. + * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`. + */ + function hashHas(key) { + var data = this.__data__; + return nativeCreate ? (data[key] !== undefined) : hasOwnProperty.call(data, key); + } + + /** + * Sets the hash `key` to `value`. + * + * @private + * @name set + * @memberOf Hash + * @param {string} key The key of the value to set. + * @param {*} value The value to set. + * @returns {Object} Returns the hash instance. + */ + function hashSet(key, value) { + var data = this.__data__; + this.size += this.has(key) ? 0 : 1; + data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value; + return this; + } + + // Add methods to `Hash`. + Hash.prototype.clear = hashClear; + Hash.prototype['delete'] = hashDelete; + Hash.prototype.get = hashGet; + Hash.prototype.has = hashHas; + Hash.prototype.set = hashSet; + + /*------------------------------------------------------------------------*/ + + /** + * Creates an list cache object. + * + * @private + * @constructor + * @param {Array} [entries] The key-value pairs to cache. + */ + function ListCache(entries) { + var index = -1, + length = entries == null ? 0 : entries.length; + + this.clear(); + while (++index < length) { + var entry = entries[index]; + this.set(entry[0], entry[1]); + } + } + + /** + * Removes all key-value entries from the list cache. + * + * @private + * @name clear + * @memberOf ListCache + */ + function listCacheClear() { + this.__data__ = []; + this.size = 0; + } + + /** + * Removes `key` and its value from the list cache. + * + * @private + * @name delete + * @memberOf ListCache + * @param {string} key The key of the value to remove. + * @returns {boolean} Returns `true` if the entry was removed, else `false`. + */ + function listCacheDelete(key) { + var data = this.__data__, + index = assocIndexOf(data, key); + + if (index < 0) { + return false; + } + var lastIndex = data.length - 1; + if (index == lastIndex) { + data.pop(); + } else { + splice.call(data, index, 1); + } + --this.size; + return true; + } + + /** + * Gets the list cache value for `key`. + * + * @private + * @name get + * @memberOf ListCache + * @param {string} key The key of the value to get. + * @returns {*} Returns the entry value. + */ + function listCacheGet(key) { + var data = this.__data__, + index = assocIndexOf(data, key); + + return index < 0 ? undefined : data[index][1]; + } + + /** + * Checks if a list cache value for `key` exists. + * + * @private + * @name has + * @memberOf ListCache + * @param {string} key The key of the entry to check. + * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`. + */ + function listCacheHas(key) { + return assocIndexOf(this.__data__, key) > -1; + } + + /** + * Sets the list cache `key` to `value`. + * + * @private + * @name set + * @memberOf ListCache + * @param {string} key The key of the value to set. + * @param {*} value The value to set. + * @returns {Object} Returns the list cache instance. + */ + function listCacheSet(key, value) { + var data = this.__data__, + index = assocIndexOf(data, key); + + if (index < 0) { + ++this.size; + data.push([key, value]); + } else { + data[index][1] = value; + } + return this; + } + + // Add methods to `ListCache`. + ListCache.prototype.clear = listCacheClear; + ListCache.prototype['delete'] = listCacheDelete; + ListCache.prototype.get = listCacheGet; + ListCache.prototype.has = listCacheHas; + ListCache.prototype.set = listCacheSet; + + /*------------------------------------------------------------------------*/ + + /** + * Creates a map cache object to store key-value pairs. + * + * @private + * @constructor + * @param {Array} [entries] The key-value pairs to cache. + */ + function MapCache(entries) { + var index = -1, + length = entries == null ? 0 : entries.length; + + this.clear(); + while (++index < length) { + var entry = entries[index]; + this.set(entry[0], entry[1]); + } + } + + /** + * Removes all key-value entries from the map. + * + * @private + * @name clear + * @memberOf MapCache + */ + function mapCacheClear() { + this.size = 0; + this.__data__ = { + 'hash': new Hash, + 'map': new (Map || ListCache), + 'string': new Hash + }; + } + + /** + * Removes `key` and its value from the map. + * + * @private + * @name delete + * @memberOf MapCache + * @param {string} key The key of the value to remove. + * @returns {boolean} Returns `true` if the entry was removed, else `false`. + */ + function mapCacheDelete(key) { + var result = getMapData(this, key)['delete'](key); + this.size -= result ? 1 : 0; + return result; + } + + /** + * Gets the map value for `key`. + * + * @private + * @name get + * @memberOf MapCache + * @param {string} key The key of the value to get. + * @returns {*} Returns the entry value. + */ + function mapCacheGet(key) { + return getMapData(this, key).get(key); + } + + /** + * Checks if a map value for `key` exists. + * + * @private + * @name has + * @memberOf MapCache + * @param {string} key The key of the entry to check. + * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`. + */ + function mapCacheHas(key) { + return getMapData(this, key).has(key); + } + + /** + * Sets the map `key` to `value`. + * + * @private + * @name set + * @memberOf MapCache + * @param {string} key The key of the value to set. + * @param {*} value The value to set. + * @returns {Object} Returns the map cache instance. + */ + function mapCacheSet(key, value) { + var data = getMapData(this, key), + size = data.size; + + data.set(key, value); + this.size += data.size == size ? 0 : 1; + return this; + } + + // Add methods to `MapCache`. + MapCache.prototype.clear = mapCacheClear; + MapCache.prototype['delete'] = mapCacheDelete; + MapCache.prototype.get = mapCacheGet; + MapCache.prototype.has = mapCacheHas; + MapCache.prototype.set = mapCacheSet; + + /*------------------------------------------------------------------------*/ + + /** + * + * Creates an array cache object to store unique values. + * + * @private + * @constructor + * @param {Array} [values] The values to cache. + */ + function SetCache(values) { + var index = -1, + length = values == null ? 0 : values.length; + + this.__data__ = new MapCache; + while (++index < length) { + this.add(values[index]); + } + } + + /** + * Adds `value` to the array cache. + * + * @private + * @name add + * @memberOf SetCache + * @alias push + * @param {*} value The value to cache. + * @returns {Object} Returns the cache instance. + */ + function setCacheAdd(value) { + this.__data__.set(value, HASH_UNDEFINED); + return this; + } + + /** + * Checks if `value` is in the array cache. + * + * @private + * @name has + * @memberOf SetCache + * @param {*} value The value to search for. + * @returns {number} Returns `true` if `value` is found, else `false`. + */ + function setCacheHas(value) { + return this.__data__.has(value); + } + + // Add methods to `SetCache`. + SetCache.prototype.add = SetCache.prototype.push = setCacheAdd; + SetCache.prototype.has = setCacheHas; + + /*------------------------------------------------------------------------*/ + + /** + * Creates a stack cache object to store key-value pairs. + * + * @private + * @constructor + * @param {Array} [entries] The key-value pairs to cache. + */ + function Stack(entries) { + var data = this.__data__ = new ListCache(entries); + this.size = data.size; + } + + /** + * Removes all key-value entries from the stack. + * + * @private + * @name clear + * @memberOf Stack + */ + function stackClear() { + this.__data__ = new ListCache; + this.size = 0; + } + + /** + * Removes `key` and its value from the stack. + * + * @private + * @name delete + * @memberOf Stack + * @param {string} key The key of the value to remove. + * @returns {boolean} Returns `true` if the entry was removed, else `false`. + */ + function stackDelete(key) { + var data = this.__data__, + result = data['delete'](key); + + this.size = data.size; + return result; + } + + /** + * Gets the stack value for `key`. + * + * @private + * @name get + * @memberOf Stack + * @param {string} key The key of the value to get. + * @returns {*} Returns the entry value. + */ + function stackGet(key) { + return this.__data__.get(key); + } + + /** + * Checks if a stack value for `key` exists. + * + * @private + * @name has + * @memberOf Stack + * @param {string} key The key of the entry to check. + * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`. + */ + function stackHas(key) { + return this.__data__.has(key); + } + + /** + * Sets the stack `key` to `value`. + * + * @private + * @name set + * @memberOf Stack + * @param {string} key The key of the value to set. + * @param {*} value The value to set. + * @returns {Object} Returns the stack cache instance. + */ + function stackSet(key, value) { + var data = this.__data__; + if (data instanceof ListCache) { + var pairs = data.__data__; + if (!Map || (pairs.length < LARGE_ARRAY_SIZE - 1)) { + pairs.push([key, value]); + this.size = ++data.size; + return this; + } + data = this.__data__ = new MapCache(pairs); + } + data.set(key, value); + this.size = data.size; + return this; + } + + // Add methods to `Stack`. + Stack.prototype.clear = stackClear; + Stack.prototype['delete'] = stackDelete; + Stack.prototype.get = stackGet; + Stack.prototype.has = stackHas; + Stack.prototype.set = stackSet; + + /*------------------------------------------------------------------------*/ + + /** + * Creates an array of the enumerable property names of the array-like `value`. + * + * @private + * @param {*} value The value to query. + * @param {boolean} inherited Specify returning inherited property names. + * @returns {Array} Returns the array of property names. + */ + function arrayLikeKeys(value, inherited) { + var isArr = isArray(value), + isArg = !isArr && isArguments(value), + isBuff = !isArr && !isArg && isBuffer(value), + isType = !isArr && !isArg && !isBuff && isTypedArray(value), + skipIndexes = isArr || isArg || isBuff || isType, + result = skipIndexes ? baseTimes(value.length, String) : [], + length = result.length; + + for (var key in value) { + if ((inherited || hasOwnProperty.call(value, key)) && + !(skipIndexes && ( + // Safari 9 has enumerable `arguments.length` in strict mode. + key == 'length' || + // Node.js 0.10 has enumerable non-index properties on buffers. + (isBuff && (key == 'offset' || key == 'parent')) || + // PhantomJS 2 has enumerable non-index properties on typed arrays. + (isType && (key == 'buffer' || key == 'byteLength' || key == 'byteOffset')) || + // Skip index properties. + isIndex(key, length) + ))) { + result.push(key); + } + } + return result; + } + + /** + * A specialized version of `_.sample` for arrays. + * + * @private + * @param {Array} array The array to sample. + * @returns {*} Returns the random element. + */ + function arraySample(array) { + var length = array.length; + return length ? array[baseRandom(0, length - 1)] : undefined; + } + + /** + * A specialized version of `_.sampleSize` for arrays. + * + * @private + * @param {Array} array The array to sample. + * @param {number} n The number of elements to sample. + * @returns {Array} Returns the random elements. + */ + function arraySampleSize(array, n) { + return shuffleSelf(copyArray(array), baseClamp(n, 0, array.length)); + } + + /** + * A specialized version of `_.shuffle` for arrays. + * + * @private + * @param {Array} array The array to shuffle. + * @returns {Array} Returns the new shuffled array. + */ + function arrayShuffle(array) { + return shuffleSelf(copyArray(array)); + } + + /** + * This function is like `assignValue` except that it doesn't assign + * `undefined` values. + * + * @private + * @param {Object} object The object to modify. + * @param {string} key The key of the property to assign. + * @param {*} value The value to assign. + */ + function assignMergeValue(object, key, value) { + if ((value !== undefined && !eq(object[key], value)) || + (value === undefined && !(key in object))) { + baseAssignValue(object, key, value); + } + } + + /** + * Assigns `value` to `key` of `object` if the existing value is not equivalent + * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero) + * for equality comparisons. + * + * @private + * @param {Object} object The object to modify. + * @param {string} key The key of the property to assign. + * @param {*} value The value to assign. + */ + function assignValue(object, key, value) { + var objValue = object[key]; + if (!(hasOwnProperty.call(object, key) && eq(objValue, value)) || + (value === undefined && !(key in object))) { + baseAssignValue(object, key, value); + } + } + + /** + * Gets the index at which the `key` is found in `array` of key-value pairs. + * + * @private + * @param {Array} array The array to inspect. + * @param {*} key The key to search for. + * @returns {number} Returns the index of the matched value, else `-1`. + */ + function assocIndexOf(array, key) { + var length = array.length; + while (length--) { + if (eq(array[length][0], key)) { + return length; + } + } + return -1; + } + + /** + * Aggregates elements of `collection` on `accumulator` with keys transformed + * by `iteratee` and values set by `setter`. + * + * @private + * @param {Array|Object} collection The collection to iterate over. + * @param {Function} setter The function to set `accumulator` values. + * @param {Function} iteratee The iteratee to transform keys. + * @param {Object} accumulator The initial aggregated object. + * @returns {Function} Returns `accumulator`. + */ + function baseAggregator(collection, setter, iteratee, accumulator) { + baseEach(collection, function(value, key, collection) { + setter(accumulator, value, iteratee(value), collection); + }); + return accumulator; + } + + /** + * The base implementation of `_.assign` without support for multiple sources + * or `customizer` functions. + * + * @private + * @param {Object} object The destination object. + * @param {Object} source The source object. + * @returns {Object} Returns `object`. + */ + function baseAssign(object, source) { + return object && copyObject(source, keys(source), object); + } + + /** + * The base implementation of `_.assignIn` without support for multiple sources + * or `customizer` functions. + * + * @private + * @param {Object} object The destination object. + * @param {Object} source The source object. + * @returns {Object} Returns `object`. + */ + function baseAssignIn(object, source) { + return object && copyObject(source, keysIn(source), object); + } + + /** + * The base implementation of `assignValue` and `assignMergeValue` without + * value checks. + * + * @private + * @param {Object} object The object to modify. + * @param {string} key The key of the property to assign. + * @param {*} value The value to assign. + */ + function baseAssignValue(object, key, value) { + if (key == '__proto__' && defineProperty) { + defineProperty(object, key, { + 'configurable': true, + 'enumerable': true, + 'value': value, + 'writable': true + }); + } else { + object[key] = value; + } + } + + /** + * The base implementation of `_.at` without support for individual paths. + * + * @private + * @param {Object} object The object to iterate over. + * @param {string[]} paths The property paths to pick. + * @returns {Array} Returns the picked elements. + */ + function baseAt(object, paths) { + var index = -1, + length = paths.length, + result = Array(length), + skip = object == null; + + while (++index < length) { + result[index] = skip ? undefined : get(object, paths[index]); + } + return result; + } + + /** + * The base implementation of `_.clamp` which doesn't coerce arguments. + * + * @private + * @param {number} number The number to clamp. + * @param {number} [lower] The lower bound. + * @param {number} upper The upper bound. + * @returns {number} Returns the clamped number. + */ + function baseClamp(number, lower, upper) { + if (number === number) { + if (upper !== undefined) { + number = number <= upper ? number : upper; + } + if (lower !== undefined) { + number = number >= lower ? number : lower; + } + } + return number; + } + + /** + * The base implementation of `_.clone` and `_.cloneDeep` which tracks + * traversed objects. + * + * @private + * @param {*} value The value to clone. + * @param {boolean} bitmask The bitmask flags. + * 1 - Deep clone + * 2 - Flatten inherited properties + * 4 - Clone symbols + * @param {Function} [customizer] The function to customize cloning. + * @param {string} [key] The key of `value`. + * @param {Object} [object] The parent object of `value`. + * @param {Object} [stack] Tracks traversed objects and their clone counterparts. + * @returns {*} Returns the cloned value. + */ + function baseClone(value, bitmask, customizer, key, object, stack) { + var result, + isDeep = bitmask & CLONE_DEEP_FLAG, + isFlat = bitmask & CLONE_FLAT_FLAG, + isFull = bitmask & CLONE_SYMBOLS_FLAG; + + if (customizer) { + result = object ? customizer(value, key, object, stack) : customizer(value); + } + if (result !== undefined) { + return result; + } + if (!isObject(value)) { + return value; + } + var isArr = isArray(value); + if (isArr) { + result = initCloneArray(value); + if (!isDeep) { + return copyArray(value, result); + } + } else { + var tag = getTag(value), + isFunc = tag == funcTag || tag == genTag; + + if (isBuffer(value)) { + return cloneBuffer(value, isDeep); + } + if (tag == objectTag || tag == argsTag || (isFunc && !object)) { + result = (isFlat || isFunc) ? {} : initCloneObject(value); + if (!isDeep) { + return isFlat + ? copySymbolsIn(value, baseAssignIn(result, value)) + : copySymbols(value, baseAssign(result, value)); + } + } else { + if (!cloneableTags[tag]) { + return object ? value : {}; + } + result = initCloneByTag(value, tag, isDeep); + } + } + // Check for circular references and return its corresponding clone. + stack || (stack = new Stack); + var stacked = stack.get(value); + if (stacked) { + return stacked; + } + stack.set(value, result); + + if (isSet(value)) { + value.forEach(function(subValue) { + result.add(baseClone(subValue, bitmask, customizer, subValue, value, stack)); + }); + + return result; + } + + if (isMap(value)) { + value.forEach(function(subValue, key) { + result.set(key, baseClone(subValue, bitmask, customizer, key, value, stack)); + }); + + return result; + } + + var keysFunc = isFull + ? (isFlat ? getAllKeysIn : getAllKeys) + : (isFlat ? keysIn : keys); + + var props = isArr ? undefined : keysFunc(value); + arrayEach(props || value, function(subValue, key) { + if (props) { + key = subValue; + subValue = value[key]; + } + // Recursively populate clone (susceptible to call stack limits). + assignValue(result, key, baseClone(subValue, bitmask, customizer, key, value, stack)); + }); + return result; + } + + /** + * The base implementation of `_.conforms` which doesn't clone `source`. + * + * @private + * @param {Object} source The object of property predicates to conform to. + * @returns {Function} Returns the new spec function. + */ + function baseConforms(source) { + var props = keys(source); + return function(object) { + return baseConformsTo(object, source, props); + }; + } + + /** + * The base implementation of `_.conformsTo` which accepts `props` to check. + * + * @private + * @param {Object} object The object to inspect. + * @param {Object} source The object of property predicates to conform to. + * @returns {boolean} Returns `true` if `object` conforms, else `false`. + */ + function baseConformsTo(object, source, props) { + var length = props.length; + if (object == null) { + return !length; + } + object = Object(object); + while (length--) { + var key = props[length], + predicate = source[key], + value = object[key]; + + if ((value === undefined && !(key in object)) || !predicate(value)) { + return false; + } + } + return true; + } + + /** + * The base implementation of `_.delay` and `_.defer` which accepts `args` + * to provide to `func`. + * + * @private + * @param {Function} func The function to delay. + * @param {number} wait The number of milliseconds to delay invocation. + * @param {Array} args The arguments to provide to `func`. + * @returns {number|Object} Returns the timer id or timeout object. + */ + function baseDelay(func, wait, args) { + if (typeof func != 'function') { + throw new TypeError(FUNC_ERROR_TEXT); + } + return setTimeout(function() { func.apply(undefined, args); }, wait); + } + + /** + * The base implementation of methods like `_.difference` without support + * for excluding multiple arrays or iteratee shorthands. + * + * @private + * @param {Array} array The array to inspect. + * @param {Array} values The values to exclude. + * @param {Function} [iteratee] The iteratee invoked per element. + * @param {Function} [comparator] The comparator invoked per element. + * @returns {Array} Returns the new array of filtered values. + */ + function baseDifference(array, values, iteratee, comparator) { + var index = -1, + includes = arrayIncludes, + isCommon = true, + length = array.length, + result = [], + valuesLength = values.length; + + if (!length) { + return result; + } + if (iteratee) { + values = arrayMap(values, baseUnary(iteratee)); + } + if (comparator) { + includes = arrayIncludesWith; + isCommon = false; + } + else if (values.length >= LARGE_ARRAY_SIZE) { + includes = cacheHas; + isCommon = false; + values = new SetCache(values); + } + outer: + while (++index < length) { + var value = array[index], + computed = iteratee == null ? value : iteratee(value); + + value = (comparator || value !== 0) ? value : 0; + if (isCommon && computed === computed) { + var valuesIndex = valuesLength; + while (valuesIndex--) { + if (values[valuesIndex] === computed) { + continue outer; + } + } + result.push(value); + } + else if (!includes(values, computed, comparator)) { + result.push(value); + } + } + return result; + } + + /** + * The base implementation of `_.forEach` without support for iteratee shorthands. + * + * @private + * @param {Array|Object} collection The collection to iterate over. + * @param {Function} iteratee The function invoked per iteration. + * @returns {Array|Object} Returns `collection`. + */ + var baseEach = createBaseEach(baseForOwn); + + /** + * The base implementation of `_.forEachRight` without support for iteratee shorthands. + * + * @private + * @param {Array|Object} collection The collection to iterate over. + * @param {Function} iteratee The function invoked per iteration. + * @returns {Array|Object} Returns `collection`. + */ + var baseEachRight = createBaseEach(baseForOwnRight, true); + + /** + * The base implementation of `_.every` without support for iteratee shorthands. + * + * @private + * @param {Array|Object} collection The collection to iterate over. + * @param {Function} predicate The function invoked per iteration. + * @returns {boolean} Returns `true` if all elements pass the predicate check, + * else `false` + */ + function baseEvery(collection, predicate) { + var result = true; + baseEach(collection, function(value, index, collection) { + result = !!predicate(value, index, collection); + return result; + }); + return result; + } + + /** + * The base implementation of methods like `_.max` and `_.min` which accepts a + * `comparator` to determine the extremum value. + * + * @private + * @param {Array} array The array to iterate over. + * @param {Function} iteratee The iteratee invoked per iteration. + * @param {Function} comparator The comparator used to compare values. + * @returns {*} Returns the extremum value. + */ + function baseExtremum(array, iteratee, comparator) { + var index = -1, + length = array.length; + + while (++index < length) { + var value = array[index], + current = iteratee(value); + + if (current != null && (computed === undefined + ? (current === current && !isSymbol(current)) + : comparator(current, computed) + )) { + var computed = current, + result = value; + } + } + return result; + } + + /** + * The base implementation of `_.fill` without an iteratee call guard. + * + * @private + * @param {Array} array The array to fill. + * @param {*} value The value to fill `array` with. + * @param {number} [start=0] The start position. + * @param {number} [end=array.length] The end position. + * @returns {Array} Returns `array`. + */ + function baseFill(array, value, start, end) { + var length = array.length; + + start = toInteger(start); + if (start < 0) { + start = -start > length ? 0 : (length + start); + } + end = (end === undefined || end > length) ? length : toInteger(end); + if (end < 0) { + end += length; + } + end = start > end ? 0 : toLength(end); + while (start < end) { + array[start++] = value; + } + return array; + } + + /** + * The base implementation of `_.filter` without support for iteratee shorthands. + * + * @private + * @param {Array|Object} collection The collection to iterate over. + * @param {Function} predicate The function invoked per iteration. + * @returns {Array} Returns the new filtered array. + */ + function baseFilter(collection, predicate) { + var result = []; + baseEach(collection, function(value, index, collection) { + if (predicate(value, index, collection)) { + result.push(value); + } + }); + return result; + } + + /** + * The base implementation of `_.flatten` with support for restricting flattening. + * + * @private + * @param {Array} array The array to flatten. + * @param {number} depth The maximum recursion depth. + * @param {boolean} [predicate=isFlattenable] The function invoked per iteration. + * @param {boolean} [isStrict] Restrict to values that pass `predicate` checks. + * @param {Array} [result=[]] The initial result value. + * @returns {Array} Returns the new flattened array. + */ + function baseFlatten(array, depth, predicate, isStrict, result) { + var index = -1, + length = array.length; + + predicate || (predicate = isFlattenable); + result || (result = []); + + while (++index < length) { + var value = array[index]; + if (depth > 0 && predicate(value)) { + if (depth > 1) { + // Recursively flatten arrays (susceptible to call stack limits). + baseFlatten(value, depth - 1, predicate, isStrict, result); + } else { + arrayPush(result, value); + } + } else if (!isStrict) { + result[result.length] = value; + } + } + return result; + } + + /** + * The base implementation of `baseForOwn` which iterates over `object` + * properties returned by `keysFunc` and invokes `iteratee` for each property. + * Iteratee functions may exit iteration early by explicitly returning `false`. + * + * @private + * @param {Object} object The object to iterate over. + * @param {Function} iteratee The function invoked per iteration. + * @param {Function} keysFunc The function to get the keys of `object`. + * @returns {Object} Returns `object`. + */ + var baseFor = createBaseFor(); + + /** + * This function is like `baseFor` except that it iterates over properties + * in the opposite order. + * + * @private + * @param {Object} object The object to iterate over. + * @param {Function} iteratee The function invoked per iteration. + * @param {Function} keysFunc The function to get the keys of `object`. + * @returns {Object} Returns `object`. + */ + var baseForRight = createBaseFor(true); + + /** + * The base implementation of `_.forOwn` without support for iteratee shorthands. + * + * @private + * @param {Object} object The object to iterate over. + * @param {Function} iteratee The function invoked per iteration. + * @returns {Object} Returns `object`. + */ + function baseForOwn(object, iteratee) { + return object && baseFor(object, iteratee, keys); + } + + /** + * The base implementation of `_.forOwnRight` without support for iteratee shorthands. + * + * @private + * @param {Object} object The object to iterate over. + * @param {Function} iteratee The function invoked per iteration. + * @returns {Object} Returns `object`. + */ + function baseForOwnRight(object, iteratee) { + return object && baseForRight(object, iteratee, keys); + } + + /** + * The base implementation of `_.functions` which creates an array of + * `object` function property names filtered from `props`. + * + * @private + * @param {Object} object The object to inspect. + * @param {Array} props The property names to filter. + * @returns {Array} Returns the function names. + */ + function baseFunctions(object, props) { + return arrayFilter(props, function(key) { + return isFunction(object[key]); + }); + } + + /** + * The base implementation of `_.get` without support for default values. + * + * @private + * @param {Object} object The object to query. + * @param {Array|string} path The path of the property to get. + * @returns {*} Returns the resolved value. + */ + function baseGet(object, path) { + path = castPath(path, object); + + var index = 0, + length = path.length; + + while (object != null && index < length) { + object = object[toKey(path[index++])]; + } + return (index && index == length) ? object : undefined; + } + + /** + * The base implementation of `getAllKeys` and `getAllKeysIn` which uses + * `keysFunc` and `symbolsFunc` to get the enumerable property names and + * symbols of `object`. + * + * @private + * @param {Object} object The object to query. + * @param {Function} keysFunc The function to get the keys of `object`. + * @param {Function} symbolsFunc The function to get the symbols of `object`. + * @returns {Array} Returns the array of property names and symbols. + */ + function baseGetAllKeys(object, keysFunc, symbolsFunc) { + var result = keysFunc(object); + return isArray(object) ? result : arrayPush(result, symbolsFunc(object)); + } + + /** + * The base implementation of `getTag` without fallbacks for buggy environments. + * + * @private + * @param {*} value The value to query. + * @returns {string} Returns the `toStringTag`. + */ + function baseGetTag(value) { + if (value == null) { + return value === undefined ? undefinedTag : nullTag; + } + return (symToStringTag && symToStringTag in Object(value)) + ? getRawTag(value) + : objectToString(value); + } + + /** + * The base implementation of `_.gt` which doesn't coerce arguments. + * + * @private + * @param {*} value The value to compare. + * @param {*} other The other value to compare. + * @returns {boolean} Returns `true` if `value` is greater than `other`, + * else `false`. + */ + function baseGt(value, other) { + return value > other; + } + + /** + * The base implementation of `_.has` without support for deep paths. + * + * @private + * @param {Object} [object] The object to query. + * @param {Array|string} key The key to check. + * @returns {boolean} Returns `true` if `key` exists, else `false`. + */ + function baseHas(object, key) { + return object != null && hasOwnProperty.call(object, key); + } + + /** + * The base implementation of `_.hasIn` without support for deep paths. + * + * @private + * @param {Object} [object] The object to query. + * @param {Array|string} key The key to check. + * @returns {boolean} Returns `true` if `key` exists, else `false`. + */ + function baseHasIn(object, key) { + return object != null && key in Object(object); + } + + /** + * The base implementation of `_.inRange` which doesn't coerce arguments. + * + * @private + * @param {number} number The number to check. + * @param {number} start The start of the range. + * @param {number} end The end of the range. + * @returns {boolean} Returns `true` if `number` is in the range, else `false`. + */ + function baseInRange(number, start, end) { + return number >= nativeMin(start, end) && number < nativeMax(start, end); + } + + /** + * The base implementation of methods like `_.intersection`, without support + * for iteratee shorthands, that accepts an array of arrays to inspect. + * + * @private + * @param {Array} arrays The arrays to inspect. + * @param {Function} [iteratee] The iteratee invoked per element. + * @param {Function} [comparator] The comparator invoked per element. + * @returns {Array} Returns the new array of shared values. + */ + function baseIntersection(arrays, iteratee, comparator) { + var includes = comparator ? arrayIncludesWith : arrayIncludes, + length = arrays[0].length, + othLength = arrays.length, + othIndex = othLength, + caches = Array(othLength), + maxLength = Infinity, + result = []; + + while (othIndex--) { + var array = arrays[othIndex]; + if (othIndex && iteratee) { + array = arrayMap(array, baseUnary(iteratee)); + } + maxLength = nativeMin(array.length, maxLength); + caches[othIndex] = !comparator && (iteratee || (length >= 120 && array.length >= 120)) + ? new SetCache(othIndex && array) + : undefined; + } + array = arrays[0]; + + var index = -1, + seen = caches[0]; + + outer: + while (++index < length && result.length < maxLength) { + var value = array[index], + computed = iteratee ? iteratee(value) : value; + + value = (comparator || value !== 0) ? value : 0; + if (!(seen + ? cacheHas(seen, computed) + : includes(result, computed, comparator) + )) { + othIndex = othLength; + while (--othIndex) { + var cache = caches[othIndex]; + if (!(cache + ? cacheHas(cache, computed) + : includes(arrays[othIndex], computed, comparator)) + ) { + continue outer; + } + } + if (seen) { + seen.push(computed); + } + result.push(value); + } + } + return result; + } + + /** + * The base implementation of `_.invert` and `_.invertBy` which inverts + * `object` with values transformed by `iteratee` and set by `setter`. + * + * @private + * @param {Object} object The object to iterate over. + * @param {Function} setter The function to set `accumulator` values. + * @param {Function} iteratee The iteratee to transform values. + * @param {Object} accumulator The initial inverted object. + * @returns {Function} Returns `accumulator`. + */ + function baseInverter(object, setter, iteratee, accumulator) { + baseForOwn(object, function(value, key, object) { + setter(accumulator, iteratee(value), key, object); + }); + return accumulator; + } + + /** + * The base implementation of `_.invoke` without support for individual + * method arguments. + * + * @private + * @param {Object} object The object to query. + * @param {Array|string} path The path of the method to invoke. + * @param {Array} args The arguments to invoke the method with. + * @returns {*} Returns the result of the invoked method. + */ + function baseInvoke(object, path, args) { + path = castPath(path, object); + object = parent(object, path); + var func = object == null ? object : object[toKey(last(path))]; + return func == null ? undefined : apply(func, object, args); + } + + /** + * The base implementation of `_.isArguments`. + * + * @private + * @param {*} value The value to check. + * @returns {boolean} Returns `true` if `value` is an `arguments` object, + */ + function baseIsArguments(value) { + return isObjectLike(value) && baseGetTag(value) == argsTag; + } + + /** + * The base implementation of `_.isArrayBuffer` without Node.js optimizations. + * + * @private + * @param {*} value The value to check. + * @returns {boolean} Returns `true` if `value` is an array buffer, else `false`. + */ + function baseIsArrayBuffer(value) { + return isObjectLike(value) && baseGetTag(value) == arrayBufferTag; + } + + /** + * The base implementation of `_.isDate` without Node.js optimizations. + * + * @private + * @param {*} value The value to check. + * @returns {boolean} Returns `true` if `value` is a date object, else `false`. + */ + function baseIsDate(value) { + return isObjectLike(value) && baseGetTag(value) == dateTag; + } + + /** + * The base implementation of `_.isEqual` which supports partial comparisons + * and tracks traversed objects. + * + * @private + * @param {*} value The value to compare. + * @param {*} other The other value to compare. + * @param {boolean} bitmask The bitmask flags. + * 1 - Unordered comparison + * 2 - Partial comparison + * @param {Function} [customizer] The function to customize comparisons. + * @param {Object} [stack] Tracks traversed `value` and `other` objects. + * @returns {boolean} Returns `true` if the values are equivalent, else `false`. + */ + function baseIsEqual(value, other, bitmask, customizer, stack) { + if (value === other) { + return true; + } + if (value == null || other == null || (!isObjectLike(value) && !isObjectLike(other))) { + return value !== value && other !== other; + } + return baseIsEqualDeep(value, other, bitmask, customizer, baseIsEqual, stack); + } + + /** + * A specialized version of `baseIsEqual` for arrays and objects which performs + * deep comparisons and tracks traversed objects enabling objects with circular + * references to be compared. + * + * @private + * @param {Object} object The object to compare. + * @param {Object} other The other object to compare. + * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details. + * @param {Function} customizer The function to customize comparisons. + * @param {Function} equalFunc The function to determine equivalents of values. + * @param {Object} [stack] Tracks traversed `object` and `other` objects. + * @returns {boolean} Returns `true` if the objects are equivalent, else `false`. + */ + function baseIsEqualDeep(object, other, bitmask, customizer, equalFunc, stack) { + var objIsArr = isArray(object), + othIsArr = isArray(other), + objTag = objIsArr ? arrayTag : getTag(object), + othTag = othIsArr ? arrayTag : getTag(other); + + objTag = objTag == argsTag ? objectTag : objTag; + othTag = othTag == argsTag ? objectTag : othTag; + + var objIsObj = objTag == objectTag, + othIsObj = othTag == objectTag, + isSameTag = objTag == othTag; + + if (isSameTag && isBuffer(object)) { + if (!isBuffer(other)) { + return false; + } + objIsArr = true; + objIsObj = false; + } + if (isSameTag && !objIsObj) { + stack || (stack = new Stack); + return (objIsArr || isTypedArray(object)) + ? equalArrays(object, other, bitmask, customizer, equalFunc, stack) + : equalByTag(object, other, objTag, bitmask, customizer, equalFunc, stack); + } + if (!(bitmask & COMPARE_PARTIAL_FLAG)) { + var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'), + othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__'); + + if (objIsWrapped || othIsWrapped) { + var objUnwrapped = objIsWrapped ? object.value() : object, + othUnwrapped = othIsWrapped ? other.value() : other; + + stack || (stack = new Stack); + return equalFunc(objUnwrapped, othUnwrapped, bitmask, customizer, stack); + } + } + if (!isSameTag) { + return false; + } + stack || (stack = new Stack); + return equalObjects(object, other, bitmask, customizer, equalFunc, stack); + } + + /** + * The base implementation of `_.isMap` without Node.js optimizations. + * + * @private + * @param {*} value The value to check. + * @returns {boolean} Returns `true` if `value` is a map, else `false`. + */ + function baseIsMap(value) { + return isObjectLike(value) && getTag(value) == mapTag; + } + + /** + * The base implementation of `_.isMatch` without support for iteratee shorthands. + * + * @private + * @param {Object} object The object to inspect. + * @param {Object} source The object of property values to match. + * @param {Array} matchData The property names, values, and compare flags to match. + * @param {Function} [customizer] The function to customize comparisons. + * @returns {boolean} Returns `true` if `object` is a match, else `false`. + */ + function baseIsMatch(object, source, matchData, customizer) { + var index = matchData.length, + length = index, + noCustomizer = !customizer; + + if (object == null) { + return !length; + } + object = Object(object); + while (index--) { + var data = matchData[index]; + if ((noCustomizer && data[2]) + ? data[1] !== object[data[0]] + : !(data[0] in object) + ) { + return false; + } + } + while (++index < length) { + data = matchData[index]; + var key = data[0], + objValue = object[key], + srcValue = data[1]; + + if (noCustomizer && data[2]) { + if (objValue === undefined && !(key in object)) { + return false; + } + } else { + var stack = new Stack; + if (customizer) { + var result = customizer(objValue, srcValue, key, object, source, stack); + } + if (!(result === undefined + ? baseIsEqual(srcValue, objValue, COMPARE_PARTIAL_FLAG | COMPARE_UNORDERED_FLAG, customizer, stack) + : result + )) { + return false; + } + } + } + return true; + } + + /** + * The base implementation of `_.isNative` without bad shim checks. + * + * @private + * @param {*} value The value to check. + * @returns {boolean} Returns `true` if `value` is a native function, + * else `false`. + */ + function baseIsNative(value) { + if (!isObject(value) || isMasked(value)) { + return false; + } + var pattern = isFunction(value) ? reIsNative : reIsHostCtor; + return pattern.test(toSource(value)); + } + + /** + * The base implementation of `_.isRegExp` without Node.js optimizations. + * + * @private + * @param {*} value The value to check. + * @returns {boolean} Returns `true` if `value` is a regexp, else `false`. + */ + function baseIsRegExp(value) { + return isObjectLike(value) && baseGetTag(value) == regexpTag; + } + + /** + * The base implementation of `_.isSet` without Node.js optimizations. + * + * @private + * @param {*} value The value to check. + * @returns {boolean} Returns `true` if `value` is a set, else `false`. + */ + function baseIsSet(value) { + return isObjectLike(value) && getTag(value) == setTag; + } + + /** + * The base implementation of `_.isTypedArray` without Node.js optimizations. + * + * @private + * @param {*} value The value to check. + * @returns {boolean} Returns `true` if `value` is a typed array, else `false`. + */ + function baseIsTypedArray(value) { + return isObjectLike(value) && + isLength(value.length) && !!typedArrayTags[baseGetTag(value)]; + } + + /** + * The base implementation of `_.iteratee`. + * + * @private + * @param {*} [value=_.identity] The value to convert to an iteratee. + * @returns {Function} Returns the iteratee. + */ + function baseIteratee(value) { + // Don't store the `typeof` result in a variable to avoid a JIT bug in Safari 9. + // See https://bugs.webkit.org/show_bug.cgi?id=156034 for more details. + if (typeof value == 'function') { + return value; + } + if (value == null) { + return identity; + } + if (typeof value == 'object') { + return isArray(value) + ? baseMatchesProperty(value[0], value[1]) + : baseMatches(value); + } + return property(value); + } + + /** + * The base implementation of `_.keys` which doesn't treat sparse arrays as dense. + * + * @private + * @param {Object} object The object to query. + * @returns {Array} Returns the array of property names. + */ + function baseKeys(object) { + if (!isPrototype(object)) { + return nativeKeys(object); + } + var result = []; + for (var key in Object(object)) { + if (hasOwnProperty.call(object, key) && key != 'constructor') { + result.push(key); + } + } + return result; + } + + /** + * The base implementation of `_.keysIn` which doesn't treat sparse arrays as dense. + * + * @private + * @param {Object} object The object to query. + * @returns {Array} Returns the array of property names. + */ + function baseKeysIn(object) { + if (!isObject(object)) { + return nativeKeysIn(object); + } + var isProto = isPrototype(object), + result = []; + + for (var key in object) { + if (!(key == 'constructor' && (isProto || !hasOwnProperty.call(object, key)))) { + result.push(key); + } + } + return result; + } + + /** + * The base implementation of `_.lt` which doesn't coerce arguments. + * + * @private + * @param {*} value The value to compare. + * @param {*} other The other value to compare. + * @returns {boolean} Returns `true` if `value` is less than `other`, + * else `false`. + */ + function baseLt(value, other) { + return value < other; + } + + /** + * The base implementation of `_.map` without support for iteratee shorthands. + * + * @private + * @param {Array|Object} collection The collection to iterate over. + * @param {Function} iteratee The function invoked per iteration. + * @returns {Array} Returns the new mapped array. + */ + function baseMap(collection, iteratee) { + var index = -1, + result = isArrayLike(collection) ? Array(collection.length) : []; + + baseEach(collection, function(value, key, collection) { + result[++index] = iteratee(value, key, collection); + }); + return result; + } + + /** + * The base implementation of `_.matches` which doesn't clone `source`. + * + * @private + * @param {Object} source The object of property values to match. + * @returns {Function} Returns the new spec function. + */ + function baseMatches(source) { + var matchData = getMatchData(source); + if (matchData.length == 1 && matchData[0][2]) { + return matchesStrictComparable(matchData[0][0], matchData[0][1]); + } + return function(object) { + return object === source || baseIsMatch(object, source, matchData); + }; + } + + /** + * The base implementation of `_.matchesProperty` which doesn't clone `srcValue`. + * + * @private + * @param {string} path The path of the property to get. + * @param {*} srcValue The value to match. + * @returns {Function} Returns the new spec function. + */ + function baseMatchesProperty(path, srcValue) { + if (isKey(path) && isStrictComparable(srcValue)) { + return matchesStrictComparable(toKey(path), srcValue); + } + return function(object) { + var objValue = get(object, path); + return (objValue === undefined && objValue === srcValue) + ? hasIn(object, path) + : baseIsEqual(srcValue, objValue, COMPARE_PARTIAL_FLAG | COMPARE_UNORDERED_FLAG); + }; + } + + /** + * The base implementation of `_.merge` without support for multiple sources. + * + * @private + * @param {Object} object The destination object. + * @param {Object} source The source object. + * @param {number} srcIndex The index of `source`. + * @param {Function} [customizer] The function to customize merged values. + * @param {Object} [stack] Tracks traversed source values and their merged + * counterparts. + */ + function baseMerge(object, source, srcIndex, customizer, stack) { + if (object === source) { + return; + } + baseFor(source, function(srcValue, key) { + if (isObject(srcValue)) { + stack || (stack = new Stack); + baseMergeDeep(object, source, key, srcIndex, baseMerge, customizer, stack); + } + else { + var newValue = customizer + ? customizer(safeGet(object, key), srcValue, (key + ''), object, source, stack) + : undefined; + + if (newValue === undefined) { + newValue = srcValue; + } + assignMergeValue(object, key, newValue); + } + }, keysIn); + } + + /** + * A specialized version of `baseMerge` for arrays and objects which performs + * deep merges and tracks traversed objects enabling objects with circular + * references to be merged. + * + * @private + * @param {Object} object The destination object. + * @param {Object} source The source object. + * @param {string} key The key of the value to merge. + * @param {number} srcIndex The index of `source`. + * @param {Function} mergeFunc The function to merge values. + * @param {Function} [customizer] The function to customize assigned values. + * @param {Object} [stack] Tracks traversed source values and their merged + * counterparts. + */ + function baseMergeDeep(object, source, key, srcIndex, mergeFunc, customizer, stack) { + var objValue = safeGet(object, key), + srcValue = safeGet(source, key), + stacked = stack.get(srcValue); + + if (stacked) { + assignMergeValue(object, key, stacked); + return; + } + var newValue = customizer + ? customizer(objValue, srcValue, (key + ''), object, source, stack) + : undefined; + + var isCommon = newValue === undefined; + + if (isCommon) { + var isArr = isArray(srcValue), + isBuff = !isArr && isBuffer(srcValue), + isTyped = !isArr && !isBuff && isTypedArray(srcValue); + + newValue = srcValue; + if (isArr || isBuff || isTyped) { + if (isArray(objValue)) { + newValue = objValue; + } + else if (isArrayLikeObject(objValue)) { + newValue = copyArray(objValue); + } + else if (isBuff) { + isCommon = false; + newValue = cloneBuffer(srcValue, true); + } + else if (isTyped) { + isCommon = false; + newValue = cloneTypedArray(srcValue, true); + } + else { + newValue = []; + } + } + else if (isPlainObject(srcValue) || isArguments(srcValue)) { + newValue = objValue; + if (isArguments(objValue)) { + newValue = toPlainObject(objValue); + } + else if (!isObject(objValue) || isFunction(objValue)) { + newValue = initCloneObject(srcValue); + } + } + else { + isCommon = false; + } + } + if (isCommon) { + // Recursively merge objects and arrays (susceptible to call stack limits). + stack.set(srcValue, newValue); + mergeFunc(newValue, srcValue, srcIndex, customizer, stack); + stack['delete'](srcValue); + } + assignMergeValue(object, key, newValue); + } + + /** + * The base implementation of `_.nth` which doesn't coerce arguments. + * + * @private + * @param {Array} array The array to query. + * @param {number} n The index of the element to return. + * @returns {*} Returns the nth element of `array`. + */ + function baseNth(array, n) { + var length = array.length; + if (!length) { + return; + } + n += n < 0 ? length : 0; + return isIndex(n, length) ? array[n] : undefined; + } + + /** + * The base implementation of `_.orderBy` without param guards. + * + * @private + * @param {Array|Object} collection The collection to iterate over. + * @param {Function[]|Object[]|string[]} iteratees The iteratees to sort by. + * @param {string[]} orders The sort orders of `iteratees`. + * @returns {Array} Returns the new sorted array. + */ + function baseOrderBy(collection, iteratees, orders) { + var index = -1; + iteratees = arrayMap(iteratees.length ? iteratees : [identity], baseUnary(getIteratee())); + + var result = baseMap(collection, function(value, key, collection) { + var criteria = arrayMap(iteratees, function(iteratee) { + return iteratee(value); + }); + return { 'criteria': criteria, 'index': ++index, 'value': value }; + }); + + return baseSortBy(result, function(object, other) { + return compareMultiple(object, other, orders); + }); + } + + /** + * The base implementation of `_.pick` without support for individual + * property identifiers. + * + * @private + * @param {Object} object The source object. + * @param {string[]} paths The property paths to pick. + * @returns {Object} Returns the new object. + */ + function basePick(object, paths) { + return basePickBy(object, paths, function(value, path) { + return hasIn(object, path); + }); + } + + /** + * The base implementation of `_.pickBy` without support for iteratee shorthands. + * + * @private + * @param {Object} object The source object. + * @param {string[]} paths The property paths to pick. + * @param {Function} predicate The function invoked per property. + * @returns {Object} Returns the new object. + */ + function basePickBy(object, paths, predicate) { + var index = -1, + length = paths.length, + result = {}; + + while (++index < length) { + var path = paths[index], + value = baseGet(object, path); + + if (predicate(value, path)) { + baseSet(result, castPath(path, object), value); + } + } + return result; + } + + /** + * A specialized version of `baseProperty` which supports deep paths. + * + * @private + * @param {Array|string} path The path of the property to get. + * @returns {Function} Returns the new accessor function. + */ + function basePropertyDeep(path) { + return function(object) { + return baseGet(object, path); + }; + } + + /** + * The base implementation of `_.pullAllBy` without support for iteratee + * shorthands. + * + * @private + * @param {Array} array The array to modify. + * @param {Array} values The values to remove. + * @param {Function} [iteratee] The iteratee invoked per element. + * @param {Function} [comparator] The comparator invoked per element. + * @returns {Array} Returns `array`. + */ + function basePullAll(array, values, iteratee, comparator) { + var indexOf = comparator ? baseIndexOfWith : baseIndexOf, + index = -1, + length = values.length, + seen = array; + + if (array === values) { + values = copyArray(values); + } + if (iteratee) { + seen = arrayMap(array, baseUnary(iteratee)); + } + while (++index < length) { + var fromIndex = 0, + value = values[index], + computed = iteratee ? iteratee(value) : value; + + while ((fromIndex = indexOf(seen, computed, fromIndex, comparator)) > -1) { + if (seen !== array) { + splice.call(seen, fromIndex, 1); + } + splice.call(array, fromIndex, 1); + } + } + return array; + } + + /** + * The base implementation of `_.pullAt` without support for individual + * indexes or capturing the removed elements. + * + * @private + * @param {Array} array The array to modify. + * @param {number[]} indexes The indexes of elements to remove. + * @returns {Array} Returns `array`. + */ + function basePullAt(array, indexes) { + var length = array ? indexes.length : 0, + lastIndex = length - 1; + + while (length--) { + var index = indexes[length]; + if (length == lastIndex || index !== previous) { + var previous = index; + if (isIndex(index)) { + splice.call(array, index, 1); + } else { + baseUnset(array, index); + } + } + } + return array; + } + + /** + * The base implementation of `_.random` without support for returning + * floating-point numbers. + * + * @private + * @param {number} lower The lower bound. + * @param {number} upper The upper bound. + * @returns {number} Returns the random number. + */ + function baseRandom(lower, upper) { + return lower + nativeFloor(nativeRandom() * (upper - lower + 1)); + } + + /** + * The base implementation of `_.range` and `_.rangeRight` which doesn't + * coerce arguments. + * + * @private + * @param {number} start The start of the range. + * @param {number} end The end of the range. + * @param {number} step The value to increment or decrement by. + * @param {boolean} [fromRight] Specify iterating from right to left. + * @returns {Array} Returns the range of numbers. + */ + function baseRange(start, end, step, fromRight) { + var index = -1, + length = nativeMax(nativeCeil((end - start) / (step || 1)), 0), + result = Array(length); + + while (length--) { + result[fromRight ? length : ++index] = start; + start += step; + } + return result; + } + + /** + * The base implementation of `_.repeat` which doesn't coerce arguments. + * + * @private + * @param {string} string The string to repeat. + * @param {number} n The number of times to repeat the string. + * @returns {string} Returns the repeated string. + */ + function baseRepeat(string, n) { + var result = ''; + if (!string || n < 1 || n > MAX_SAFE_INTEGER) { + return result; + } + // Leverage the exponentiation by squaring algorithm for a faster repeat. + // See https://en.wikipedia.org/wiki/Exponentiation_by_squaring for more details. + do { + if (n % 2) { + result += string; + } + n = nativeFloor(n / 2); + if (n) { + string += string; + } + } while (n); + + return result; + } + + /** + * The base implementation of `_.rest` which doesn't validate or coerce arguments. + * + * @private + * @param {Function} func The function to apply a rest parameter to. + * @param {number} [start=func.length-1] The start position of the rest parameter. + * @returns {Function} Returns the new function. + */ + function baseRest(func, start) { + return setToString(overRest(func, start, identity), func + ''); + } + + /** + * The base implementation of `_.sample`. + * + * @private + * @param {Array|Object} collection The collection to sample. + * @returns {*} Returns the random element. + */ + function baseSample(collection) { + return arraySample(values(collection)); + } + + /** + * The base implementation of `_.sampleSize` without param guards. + * + * @private + * @param {Array|Object} collection The collection to sample. + * @param {number} n The number of elements to sample. + * @returns {Array} Returns the random elements. + */ + function baseSampleSize(collection, n) { + var array = values(collection); + return shuffleSelf(array, baseClamp(n, 0, array.length)); + } + + /** + * The base implementation of `_.set`. + * + * @private + * @param {Object} object The object to modify. + * @param {Array|string} path The path of the property to set. + * @param {*} value The value to set. + * @param {Function} [customizer] The function to customize path creation. + * @returns {Object} Returns `object`. + */ + function baseSet(object, path, value, customizer) { + if (!isObject(object)) { + return object; + } + path = castPath(path, object); + + var index = -1, + length = path.length, + lastIndex = length - 1, + nested = object; + + while (nested != null && ++index < length) { + var key = toKey(path[index]), + newValue = value; + + if (index != lastIndex) { + var objValue = nested[key]; + newValue = customizer ? customizer(objValue, key, nested) : undefined; + if (newValue === undefined) { + newValue = isObject(objValue) + ? objValue + : (isIndex(path[index + 1]) ? [] : {}); + } + } + assignValue(nested, key, newValue); + nested = nested[key]; + } + return object; + } + + /** + * The base implementation of `setData` without support for hot loop shorting. + * + * @private + * @param {Function} func The function to associate metadata with. + * @param {*} data The metadata. + * @returns {Function} Returns `func`. + */ + var baseSetData = !metaMap ? identity : function(func, data) { + metaMap.set(func, data); + return func; + }; + + /** + * The base implementation of `setToString` without support for hot loop shorting. + * + * @private + * @param {Function} func The function to modify. + * @param {Function} string The `toString` result. + * @returns {Function} Returns `func`. + */ + var baseSetToString = !defineProperty ? identity : function(func, string) { + return defineProperty(func, 'toString', { + 'configurable': true, + 'enumerable': false, + 'value': constant(string), + 'writable': true + }); + }; + + /** + * The base implementation of `_.shuffle`. + * + * @private + * @param {Array|Object} collection The collection to shuffle. + * @returns {Array} Returns the new shuffled array. + */ + function baseShuffle(collection) { + return shuffleSelf(values(collection)); + } + + /** + * The base implementation of `_.slice` without an iteratee call guard. + * + * @private + * @param {Array} array The array to slice. + * @param {number} [start=0] The start position. + * @param {number} [end=array.length] The end position. + * @returns {Array} Returns the slice of `array`. + */ + function baseSlice(array, start, end) { + var index = -1, + length = array.length; + + if (start < 0) { + start = -start > length ? 0 : (length + start); + } + end = end > length ? length : end; + if (end < 0) { + end += length; + } + length = start > end ? 0 : ((end - start) >>> 0); + start >>>= 0; + + var result = Array(length); + while (++index < length) { + result[index] = array[index + start]; + } + return result; + } + + /** + * The base implementation of `_.some` without support for iteratee shorthands. + * + * @private + * @param {Array|Object} collection The collection to iterate over. + * @param {Function} predicate The function invoked per iteration. + * @returns {boolean} Returns `true` if any element passes the predicate check, + * else `false`. + */ + function baseSome(collection, predicate) { + var result; + + baseEach(collection, function(value, index, collection) { + result = predicate(value, index, collection); + return !result; + }); + return !!result; + } + + /** + * The base implementation of `_.sortedIndex` and `_.sortedLastIndex` which + * performs a binary search of `array` to determine the index at which `value` + * should be inserted into `array` in order to maintain its sort order. + * + * @private + * @param {Array} array The sorted array to inspect. + * @param {*} value The value to evaluate. + * @param {boolean} [retHighest] Specify returning the highest qualified index. + * @returns {number} Returns the index at which `value` should be inserted + * into `array`. + */ + function baseSortedIndex(array, value, retHighest) { + var low = 0, + high = array == null ? low : array.length; + + if (typeof value == 'number' && value === value && high <= HALF_MAX_ARRAY_LENGTH) { + while (low < high) { + var mid = (low + high) >>> 1, + computed = array[mid]; + + if (computed !== null && !isSymbol(computed) && + (retHighest ? (computed <= value) : (computed < value))) { + low = mid + 1; + } else { + high = mid; + } + } + return high; + } + return baseSortedIndexBy(array, value, identity, retHighest); + } + + /** + * The base implementation of `_.sortedIndexBy` and `_.sortedLastIndexBy` + * which invokes `iteratee` for `value` and each element of `array` to compute + * their sort ranking. The iteratee is invoked with one argument; (value). + * + * @private + * @param {Array} array The sorted array to inspect. + * @param {*} value The value to evaluate. + * @param {Function} iteratee The iteratee invoked per element. + * @param {boolean} [retHighest] Specify returning the highest qualified index. + * @returns {number} Returns the index at which `value` should be inserted + * into `array`. + */ + function baseSortedIndexBy(array, value, iteratee, retHighest) { + value = iteratee(value); + + var low = 0, + high = array == null ? 0 : array.length, + valIsNaN = value !== value, + valIsNull = value === null, + valIsSymbol = isSymbol(value), + valIsUndefined = value === undefined; + + while (low < high) { + var mid = nativeFloor((low + high) / 2), + computed = iteratee(array[mid]), + othIsDefined = computed !== undefined, + othIsNull = computed === null, + othIsReflexive = computed === computed, + othIsSymbol = isSymbol(computed); + + if (valIsNaN) { + var setLow = retHighest || othIsReflexive; + } else if (valIsUndefined) { + setLow = othIsReflexive && (retHighest || othIsDefined); + } else if (valIsNull) { + setLow = othIsReflexive && othIsDefined && (retHighest || !othIsNull); + } else if (valIsSymbol) { + setLow = othIsReflexive && othIsDefined && !othIsNull && (retHighest || !othIsSymbol); + } else if (othIsNull || othIsSymbol) { + setLow = false; + } else { + setLow = retHighest ? (computed <= value) : (computed < value); + } + if (setLow) { + low = mid + 1; + } else { + high = mid; + } + } + return nativeMin(high, MAX_ARRAY_INDEX); + } + + /** + * The base implementation of `_.sortedUniq` and `_.sortedUniqBy` without + * support for iteratee shorthands. + * + * @private + * @param {Array} array The array to inspect. + * @param {Function} [iteratee] The iteratee invoked per element. + * @returns {Array} Returns the new duplicate free array. + */ + function baseSortedUniq(array, iteratee) { + var index = -1, + length = array.length, + resIndex = 0, + result = []; + + while (++index < length) { + var value = array[index], + computed = iteratee ? iteratee(value) : value; + + if (!index || !eq(computed, seen)) { + var seen = computed; + result[resIndex++] = value === 0 ? 0 : value; + } + } + return result; + } + + /** + * The base implementation of `_.toNumber` which doesn't ensure correct + * conversions of binary, hexadecimal, or octal string values. + * + * @private + * @param {*} value The value to process. + * @returns {number} Returns the number. + */ + function baseToNumber(value) { + if (typeof value == 'number') { + return value; + } + if (isSymbol(value)) { + return NAN; + } + return +value; + } + + /** + * The base implementation of `_.toString` which doesn't convert nullish + * values to empty strings. + * + * @private + * @param {*} value The value to process. + * @returns {string} Returns the string. + */ + function baseToString(value) { + // Exit early for strings to avoid a performance hit in some environments. + if (typeof value == 'string') { + return value; + } + if (isArray(value)) { + // Recursively convert values (susceptible to call stack limits). + return arrayMap(value, baseToString) + ''; + } + if (isSymbol(value)) { + return symbolToString ? symbolToString.call(value) : ''; + } + var result = (value + ''); + return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result; + } + + /** + * The base implementation of `_.uniqBy` without support for iteratee shorthands. + * + * @private + * @param {Array} array The array to inspect. + * @param {Function} [iteratee] The iteratee invoked per element. + * @param {Function} [comparator] The comparator invoked per element. + * @returns {Array} Returns the new duplicate free array. + */ + function baseUniq(array, iteratee, comparator) { + var index = -1, + includes = arrayIncludes, + length = array.length, + isCommon = true, + result = [], + seen = result; + + if (comparator) { + isCommon = false; + includes = arrayIncludesWith; + } + else if (length >= LARGE_ARRAY_SIZE) { + var set = iteratee ? null : createSet(array); + if (set) { + return setToArray(set); + } + isCommon = false; + includes = cacheHas; + seen = new SetCache; + } + else { + seen = iteratee ? [] : result; + } + outer: + while (++index < length) { + var value = array[index], + computed = iteratee ? iteratee(value) : value; + + value = (comparator || value !== 0) ? value : 0; + if (isCommon && computed === computed) { + var seenIndex = seen.length; + while (seenIndex--) { + if (seen[seenIndex] === computed) { + continue outer; + } + } + if (iteratee) { + seen.push(computed); + } + result.push(value); + } + else if (!includes(seen, computed, comparator)) { + if (seen !== result) { + seen.push(computed); + } + result.push(value); + } + } + return result; + } + + /** + * The base implementation of `_.unset`. + * + * @private + * @param {Object} object The object to modify. + * @param {Array|string} path The property path to unset. + * @returns {boolean} Returns `true` if the property is deleted, else `false`. + */ + function baseUnset(object, path) { + path = castPath(path, object); + object = parent(object, path); + return object == null || delete object[toKey(last(path))]; + } + + /** + * The base implementation of `_.update`. + * + * @private + * @param {Object} object The object to modify. + * @param {Array|string} path The path of the property to update. + * @param {Function} updater The function to produce the updated value. + * @param {Function} [customizer] The function to customize path creation. + * @returns {Object} Returns `object`. + */ + function baseUpdate(object, path, updater, customizer) { + return baseSet(object, path, updater(baseGet(object, path)), customizer); + } + + /** + * The base implementation of methods like `_.dropWhile` and `_.takeWhile` + * without support for iteratee shorthands. + * + * @private + * @param {Array} array The array to query. + * @param {Function} predicate The function invoked per iteration. + * @param {boolean} [isDrop] Specify dropping elements instead of taking them. + * @param {boolean} [fromRight] Specify iterating from right to left. + * @returns {Array} Returns the slice of `array`. + */ + function baseWhile(array, predicate, isDrop, fromRight) { + var length = array.length, + index = fromRight ? length : -1; + + while ((fromRight ? index-- : ++index < length) && + predicate(array[index], index, array)) {} + + return isDrop + ? baseSlice(array, (fromRight ? 0 : index), (fromRight ? index + 1 : length)) + : baseSlice(array, (fromRight ? index + 1 : 0), (fromRight ? length : index)); + } + + /** + * The base implementation of `wrapperValue` which returns the result of + * performing a sequence of actions on the unwrapped `value`, where each + * successive action is supplied the return value of the previous. + * + * @private + * @param {*} value The unwrapped value. + * @param {Array} actions Actions to perform to resolve the unwrapped value. + * @returns {*} Returns the resolved value. + */ + function baseWrapperValue(value, actions) { + var result = value; + if (result instanceof LazyWrapper) { + result = result.value(); + } + return arrayReduce(actions, function(result, action) { + return action.func.apply(action.thisArg, arrayPush([result], action.args)); + }, result); + } + + /** + * The base implementation of methods like `_.xor`, without support for + * iteratee shorthands, that accepts an array of arrays to inspect. + * + * @private + * @param {Array} arrays The arrays to inspect. + * @param {Function} [iteratee] The iteratee invoked per element. + * @param {Function} [comparator] The comparator invoked per element. + * @returns {Array} Returns the new array of values. + */ + function baseXor(arrays, iteratee, comparator) { + var length = arrays.length; + if (length < 2) { + return length ? baseUniq(arrays[0]) : []; + } + var index = -1, + result = Array(length); + + while (++index < length) { + var array = arrays[index], + othIndex = -1; + + while (++othIndex < length) { + if (othIndex != index) { + result[index] = baseDifference(result[index] || array, arrays[othIndex], iteratee, comparator); + } + } + } + return baseUniq(baseFlatten(result, 1), iteratee, comparator); + } + + /** + * This base implementation of `_.zipObject` which assigns values using `assignFunc`. + * + * @private + * @param {Array} props The property identifiers. + * @param {Array} values The property values. + * @param {Function} assignFunc The function to assign values. + * @returns {Object} Returns the new object. + */ + function baseZipObject(props, values, assignFunc) { + var index = -1, + length = props.length, + valsLength = values.length, + result = {}; + + while (++index < length) { + var value = index < valsLength ? values[index] : undefined; + assignFunc(result, props[index], value); + } + return result; + } + + /** + * Casts `value` to an empty array if it's not an array like object. + * + * @private + * @param {*} value The value to inspect. + * @returns {Array|Object} Returns the cast array-like object. + */ + function castArrayLikeObject(value) { + return isArrayLikeObject(value) ? value : []; + } + + /** + * Casts `value` to `identity` if it's not a function. + * + * @private + * @param {*} value The value to inspect. + * @returns {Function} Returns cast function. + */ + function castFunction(value) { + return typeof value == 'function' ? value : identity; + } + + /** + * Casts `value` to a path array if it's not one. + * + * @private + * @param {*} value The value to inspect. + * @param {Object} [object] The object to query keys on. + * @returns {Array} Returns the cast property path array. + */ + function castPath(value, object) { + if (isArray(value)) { + return value; + } + return isKey(value, object) ? [value] : stringToPath(toString(value)); + } + + /** + * A `baseRest` alias which can be replaced with `identity` by module + * replacement plugins. + * + * @private + * @type {Function} + * @param {Function} func The function to apply a rest parameter to. + * @returns {Function} Returns the new function. + */ + var castRest = baseRest; + + /** + * Casts `array` to a slice if it's needed. + * + * @private + * @param {Array} array The array to inspect. + * @param {number} start The start position. + * @param {number} [end=array.length] The end position. + * @returns {Array} Returns the cast slice. + */ + function castSlice(array, start, end) { + var length = array.length; + end = end === undefined ? length : end; + return (!start && end >= length) ? array : baseSlice(array, start, end); + } + + /** + * A simple wrapper around the global [`clearTimeout`](https://mdn.io/clearTimeout). + * + * @private + * @param {number|Object} id The timer id or timeout object of the timer to clear. + */ + var clearTimeout = ctxClearTimeout || function(id) { + return root.clearTimeout(id); + }; + + /** + * Creates a clone of `buffer`. + * + * @private + * @param {Buffer} buffer The buffer to clone. + * @param {boolean} [isDeep] Specify a deep clone. + * @returns {Buffer} Returns the cloned buffer. + */ + function cloneBuffer(buffer, isDeep) { + if (isDeep) { + return buffer.slice(); + } + var length = buffer.length, + result = allocUnsafe ? allocUnsafe(length) : new buffer.constructor(length); + + buffer.copy(result); + return result; + } + + /** + * Creates a clone of `arrayBuffer`. + * + * @private + * @param {ArrayBuffer} arrayBuffer The array buffer to clone. + * @returns {ArrayBuffer} Returns the cloned array buffer. + */ + function cloneArrayBuffer(arrayBuffer) { + var result = new arrayBuffer.constructor(arrayBuffer.byteLength); + new Uint8Array(result).set(new Uint8Array(arrayBuffer)); + return result; + } + + /** + * Creates a clone of `dataView`. + * + * @private + * @param {Object} dataView The data view to clone. + * @param {boolean} [isDeep] Specify a deep clone. + * @returns {Object} Returns the cloned data view. + */ + function cloneDataView(dataView, isDeep) { + var buffer = isDeep ? cloneArrayBuffer(dataView.buffer) : dataView.buffer; + return new dataView.constructor(buffer, dataView.byteOffset, dataView.byteLength); + } + + /** + * Creates a clone of `regexp`. + * + * @private + * @param {Object} regexp The regexp to clone. + * @returns {Object} Returns the cloned regexp. + */ + function cloneRegExp(regexp) { + var result = new regexp.constructor(regexp.source, reFlags.exec(regexp)); + result.lastIndex = regexp.lastIndex; + return result; + } + + /** + * Creates a clone of the `symbol` object. + * + * @private + * @param {Object} symbol The symbol object to clone. + * @returns {Object} Returns the cloned symbol object. + */ + function cloneSymbol(symbol) { + return symbolValueOf ? Object(symbolValueOf.call(symbol)) : {}; + } + + /** + * Creates a clone of `typedArray`. + * + * @private + * @param {Object} typedArray The typed array to clone. + * @param {boolean} [isDeep] Specify a deep clone. + * @returns {Object} Returns the cloned typed array. + */ + function cloneTypedArray(typedArray, isDeep) { + var buffer = isDeep ? cloneArrayBuffer(typedArray.buffer) : typedArray.buffer; + return new typedArray.constructor(buffer, typedArray.byteOffset, typedArray.length); + } + + /** + * Compares values to sort them in ascending order. + * + * @private + * @param {*} value The value to compare. + * @param {*} other The other value to compare. + * @returns {number} Returns the sort order indicator for `value`. + */ + function compareAscending(value, other) { + if (value !== other) { + var valIsDefined = value !== undefined, + valIsNull = value === null, + valIsReflexive = value === value, + valIsSymbol = isSymbol(value); + + var othIsDefined = other !== undefined, + othIsNull = other === null, + othIsReflexive = other === other, + othIsSymbol = isSymbol(other); + + if ((!othIsNull && !othIsSymbol && !valIsSymbol && value > other) || + (valIsSymbol && othIsDefined && othIsReflexive && !othIsNull && !othIsSymbol) || + (valIsNull && othIsDefined && othIsReflexive) || + (!valIsDefined && othIsReflexive) || + !valIsReflexive) { + return 1; + } + if ((!valIsNull && !valIsSymbol && !othIsSymbol && value < other) || + (othIsSymbol && valIsDefined && valIsReflexive && !valIsNull && !valIsSymbol) || + (othIsNull && valIsDefined && valIsReflexive) || + (!othIsDefined && valIsReflexive) || + !othIsReflexive) { + return -1; + } + } + return 0; + } + + /** + * Used by `_.orderBy` to compare multiple properties of a value to another + * and stable sort them. + * + * If `orders` is unspecified, all values are sorted in ascending order. Otherwise, + * specify an order of "desc" for descending or "asc" for ascending sort order + * of corresponding values. + * + * @private + * @param {Object} object The object to compare. + * @param {Object} other The other object to compare. + * @param {boolean[]|string[]} orders The order to sort by for each property. + * @returns {number} Returns the sort order indicator for `object`. + */ + function compareMultiple(object, other, orders) { + var index = -1, + objCriteria = object.criteria, + othCriteria = other.criteria, + length = objCriteria.length, + ordersLength = orders.length; + + while (++index < length) { + var result = compareAscending(objCriteria[index], othCriteria[index]); + if (result) { + if (index >= ordersLength) { + return result; + } + var order = orders[index]; + return result * (order == 'desc' ? -1 : 1); + } + } + // Fixes an `Array#sort` bug in the JS engine embedded in Adobe applications + // that causes it, under certain circumstances, to provide the same value for + // `object` and `other`. See https://github.com/jashkenas/underscore/pull/1247 + // for more details. + // + // This also ensures a stable sort in V8 and other engines. + // See https://bugs.chromium.org/p/v8/issues/detail?id=90 for more details. + return object.index - other.index; + } + + /** + * Creates an array that is the composition of partially applied arguments, + * placeholders, and provided arguments into a single array of arguments. + * + * @private + * @param {Array} args The provided arguments. + * @param {Array} partials The arguments to prepend to those provided. + * @param {Array} holders The `partials` placeholder indexes. + * @params {boolean} [isCurried] Specify composing for a curried function. + * @returns {Array} Returns the new array of composed arguments. + */ + function composeArgs(args, partials, holders, isCurried) { + var argsIndex = -1, + argsLength = args.length, + holdersLength = holders.length, + leftIndex = -1, + leftLength = partials.length, + rangeLength = nativeMax(argsLength - holdersLength, 0), + result = Array(leftLength + rangeLength), + isUncurried = !isCurried; + + while (++leftIndex < leftLength) { + result[leftIndex] = partials[leftIndex]; + } + while (++argsIndex < holdersLength) { + if (isUncurried || argsIndex < argsLength) { + result[holders[argsIndex]] = args[argsIndex]; + } + } + while (rangeLength--) { + result[leftIndex++] = args[argsIndex++]; + } + return result; + } + + /** + * This function is like `composeArgs` except that the arguments composition + * is tailored for `_.partialRight`. + * + * @private + * @param {Array} args The provided arguments. + * @param {Array} partials The arguments to append to those provided. + * @param {Array} holders The `partials` placeholder indexes. + * @params {boolean} [isCurried] Specify composing for a curried function. + * @returns {Array} Returns the new array of composed arguments. + */ + function composeArgsRight(args, partials, holders, isCurried) { + var argsIndex = -1, + argsLength = args.length, + holdersIndex = -1, + holdersLength = holders.length, + rightIndex = -1, + rightLength = partials.length, + rangeLength = nativeMax(argsLength - holdersLength, 0), + result = Array(rangeLength + rightLength), + isUncurried = !isCurried; + + while (++argsIndex < rangeLength) { + result[argsIndex] = args[argsIndex]; + } + var offset = argsIndex; + while (++rightIndex < rightLength) { + result[offset + rightIndex] = partials[rightIndex]; + } + while (++holdersIndex < holdersLength) { + if (isUncurried || argsIndex < argsLength) { + result[offset + holders[holdersIndex]] = args[argsIndex++]; + } + } + return result; + } + + /** + * Copies the values of `source` to `array`. + * + * @private + * @param {Array} source The array to copy values from. + * @param {Array} [array=[]] The array to copy values to. + * @returns {Array} Returns `array`. + */ + function copyArray(source, array) { + var index = -1, + length = source.length; + + array || (array = Array(length)); + while (++index < length) { + array[index] = source[index]; + } + return array; + } + + /** + * Copies properties of `source` to `object`. + * + * @private + * @param {Object} source The object to copy properties from. + * @param {Array} props The property identifiers to copy. + * @param {Object} [object={}] The object to copy properties to. + * @param {Function} [customizer] The function to customize copied values. + * @returns {Object} Returns `object`. + */ + function copyObject(source, props, object, customizer) { + var isNew = !object; + object || (object = {}); + + var index = -1, + length = props.length; + + while (++index < length) { + var key = props[index]; + + var newValue = customizer + ? customizer(object[key], source[key], key, object, source) + : undefined; + + if (newValue === undefined) { + newValue = source[key]; + } + if (isNew) { + baseAssignValue(object, key, newValue); + } else { + assignValue(object, key, newValue); + } + } + return object; + } + + /** + * Copies own symbols of `source` to `object`. + * + * @private + * @param {Object} source The object to copy symbols from. + * @param {Object} [object={}] The object to copy symbols to. + * @returns {Object} Returns `object`. + */ + function copySymbols(source, object) { + return copyObject(source, getSymbols(source), object); + } + + /** + * Copies own and inherited symbols of `source` to `object`. + * + * @private + * @param {Object} source The object to copy symbols from. + * @param {Object} [object={}] The object to copy symbols to. + * @returns {Object} Returns `object`. + */ + function copySymbolsIn(source, object) { + return copyObject(source, getSymbolsIn(source), object); + } + + /** + * Creates a function like `_.groupBy`. + * + * @private + * @param {Function} setter The function to set accumulator values. + * @param {Function} [initializer] The accumulator object initializer. + * @returns {Function} Returns the new aggregator function. + */ + function createAggregator(setter, initializer) { + return function(collection, iteratee) { + var func = isArray(collection) ? arrayAggregator : baseAggregator, + accumulator = initializer ? initializer() : {}; + + return func(collection, setter, getIteratee(iteratee, 2), accumulator); + }; + } + + /** + * Creates a function like `_.assign`. + * + * @private + * @param {Function} assigner The function to assign values. + * @returns {Function} Returns the new assigner function. + */ + function createAssigner(assigner) { + return baseRest(function(object, sources) { + var index = -1, + length = sources.length, + customizer = length > 1 ? sources[length - 1] : undefined, + guard = length > 2 ? sources[2] : undefined; + + customizer = (assigner.length > 3 && typeof customizer == 'function') + ? (length--, customizer) + : undefined; + + if (guard && isIterateeCall(sources[0], sources[1], guard)) { + customizer = length < 3 ? undefined : customizer; + length = 1; + } + object = Object(object); + while (++index < length) { + var source = sources[index]; + if (source) { + assigner(object, source, index, customizer); + } + } + return object; + }); + } + + /** + * Creates a `baseEach` or `baseEachRight` function. + * + * @private + * @param {Function} eachFunc The function to iterate over a collection. + * @param {boolean} [fromRight] Specify iterating from right to left. + * @returns {Function} Returns the new base function. + */ + function createBaseEach(eachFunc, fromRight) { + return function(collection, iteratee) { + if (collection == null) { + return collection; + } + if (!isArrayLike(collection)) { + return eachFunc(collection, iteratee); + } + var length = collection.length, + index = fromRight ? length : -1, + iterable = Object(collection); + + while ((fromRight ? index-- : ++index < length)) { + if (iteratee(iterable[index], index, iterable) === false) { + break; + } + } + return collection; + }; + } + + /** + * Creates a base function for methods like `_.forIn` and `_.forOwn`. + * + * @private + * @param {boolean} [fromRight] Specify iterating from right to left. + * @returns {Function} Returns the new base function. + */ + function createBaseFor(fromRight) { + return function(object, iteratee, keysFunc) { + var index = -1, + iterable = Object(object), + props = keysFunc(object), + length = props.length; + + while (length--) { + var key = props[fromRight ? length : ++index]; + if (iteratee(iterable[key], key, iterable) === false) { + break; + } + } + return object; + }; + } + + /** + * Creates a function that wraps `func` to invoke it with the optional `this` + * binding of `thisArg`. + * + * @private + * @param {Function} func The function to wrap. + * @param {number} bitmask The bitmask flags. See `createWrap` for more details. + * @param {*} [thisArg] The `this` binding of `func`. + * @returns {Function} Returns the new wrapped function. + */ + function createBind(func, bitmask, thisArg) { + var isBind = bitmask & WRAP_BIND_FLAG, + Ctor = createCtor(func); + + function wrapper() { + var fn = (this && this !== root && this instanceof wrapper) ? Ctor : func; + return fn.apply(isBind ? thisArg : this, arguments); + } + return wrapper; + } + + /** + * Creates a function like `_.lowerFirst`. + * + * @private + * @param {string} methodName The name of the `String` case method to use. + * @returns {Function} Returns the new case function. + */ + function createCaseFirst(methodName) { + return function(string) { + string = toString(string); + + var strSymbols = hasUnicode(string) + ? stringToArray(string) + : undefined; + + var chr = strSymbols + ? strSymbols[0] + : string.charAt(0); + + var trailing = strSymbols + ? castSlice(strSymbols, 1).join('') + : string.slice(1); + + return chr[methodName]() + trailing; + }; + } + + /** + * Creates a function like `_.camelCase`. + * + * @private + * @param {Function} callback The function to combine each word. + * @returns {Function} Returns the new compounder function. + */ + function createCompounder(callback) { + return function(string) { + return arrayReduce(words(deburr(string).replace(reApos, '')), callback, ''); + }; + } + + /** + * Creates a function that produces an instance of `Ctor` regardless of + * whether it was invoked as part of a `new` expression or by `call` or `apply`. + * + * @private + * @param {Function} Ctor The constructor to wrap. + * @returns {Function} Returns the new wrapped function. + */ + function createCtor(Ctor) { + return function() { + // Use a `switch` statement to work with class constructors. See + // http://ecma-international.org/ecma-262/7.0/#sec-ecmascript-function-objects-call-thisargument-argumentslist + // for more details. + var args = arguments; + switch (args.length) { + case 0: return new Ctor; + case 1: return new Ctor(args[0]); + case 2: return new Ctor(args[0], args[1]); + case 3: return new Ctor(args[0], args[1], args[2]); + case 4: return new Ctor(args[0], args[1], args[2], args[3]); + case 5: return new Ctor(args[0], args[1], args[2], args[3], args[4]); + case 6: return new Ctor(args[0], args[1], args[2], args[3], args[4], args[5]); + case 7: return new Ctor(args[0], args[1], args[2], args[3], args[4], args[5], args[6]); + } + var thisBinding = baseCreate(Ctor.prototype), + result = Ctor.apply(thisBinding, args); + + // Mimic the constructor's `return` behavior. + // See https://es5.github.io/#x13.2.2 for more details. + return isObject(result) ? result : thisBinding; + }; + } + + /** + * Creates a function that wraps `func` to enable currying. + * + * @private + * @param {Function} func The function to wrap. + * @param {number} bitmask The bitmask flags. See `createWrap` for more details. + * @param {number} arity The arity of `func`. + * @returns {Function} Returns the new wrapped function. + */ + function createCurry(func, bitmask, arity) { + var Ctor = createCtor(func); + + function wrapper() { + var length = arguments.length, + args = Array(length), + index = length, + placeholder = getHolder(wrapper); + + while (index--) { + args[index] = arguments[index]; + } + var holders = (length < 3 && args[0] !== placeholder && args[length - 1] !== placeholder) + ? [] + : replaceHolders(args, placeholder); + + length -= holders.length; + if (length < arity) { + return createRecurry( + func, bitmask, createHybrid, wrapper.placeholder, undefined, + args, holders, undefined, undefined, arity - length); + } + var fn = (this && this !== root && this instanceof wrapper) ? Ctor : func; + return apply(fn, this, args); + } + return wrapper; + } + + /** + * Creates a `_.find` or `_.findLast` function. + * + * @private + * @param {Function} findIndexFunc The function to find the collection index. + * @returns {Function} Returns the new find function. + */ + function createFind(findIndexFunc) { + return function(collection, predicate, fromIndex) { + var iterable = Object(collection); + if (!isArrayLike(collection)) { + var iteratee = getIteratee(predicate, 3); + collection = keys(collection); + predicate = function(key) { return iteratee(iterable[key], key, iterable); }; + } + var index = findIndexFunc(collection, predicate, fromIndex); + return index > -1 ? iterable[iteratee ? collection[index] : index] : undefined; + }; + } + + /** + * Creates a `_.flow` or `_.flowRight` function. + * + * @private + * @param {boolean} [fromRight] Specify iterating from right to left. + * @returns {Function} Returns the new flow function. + */ + function createFlow(fromRight) { + return flatRest(function(funcs) { + var length = funcs.length, + index = length, + prereq = LodashWrapper.prototype.thru; + + if (fromRight) { + funcs.reverse(); + } + while (index--) { + var func = funcs[index]; + if (typeof func != 'function') { + throw new TypeError(FUNC_ERROR_TEXT); + } + if (prereq && !wrapper && getFuncName(func) == 'wrapper') { + var wrapper = new LodashWrapper([], true); + } + } + index = wrapper ? index : length; + while (++index < length) { + func = funcs[index]; + + var funcName = getFuncName(func), + data = funcName == 'wrapper' ? getData(func) : undefined; + + if (data && isLaziable(data[0]) && + data[1] == (WRAP_ARY_FLAG | WRAP_CURRY_FLAG | WRAP_PARTIAL_FLAG | WRAP_REARG_FLAG) && + !data[4].length && data[9] == 1 + ) { + wrapper = wrapper[getFuncName(data[0])].apply(wrapper, data[3]); + } else { + wrapper = (func.length == 1 && isLaziable(func)) + ? wrapper[funcName]() + : wrapper.thru(func); + } + } + return function() { + var args = arguments, + value = args[0]; + + if (wrapper && args.length == 1 && isArray(value)) { + return wrapper.plant(value).value(); + } + var index = 0, + result = length ? funcs[index].apply(this, args) : value; + + while (++index < length) { + result = funcs[index].call(this, result); + } + return result; + }; + }); + } + + /** + * Creates a function that wraps `func` to invoke it with optional `this` + * binding of `thisArg`, partial application, and currying. + * + * @private + * @param {Function|string} func The function or method name to wrap. + * @param {number} bitmask The bitmask flags. See `createWrap` for more details. + * @param {*} [thisArg] The `this` binding of `func`. + * @param {Array} [partials] The arguments to prepend to those provided to + * the new function. + * @param {Array} [holders] The `partials` placeholder indexes. + * @param {Array} [partialsRight] The arguments to append to those provided + * to the new function. + * @param {Array} [holdersRight] The `partialsRight` placeholder indexes. + * @param {Array} [argPos] The argument positions of the new function. + * @param {number} [ary] The arity cap of `func`. + * @param {number} [arity] The arity of `func`. + * @returns {Function} Returns the new wrapped function. + */ + function createHybrid(func, bitmask, thisArg, partials, holders, partialsRight, holdersRight, argPos, ary, arity) { + var isAry = bitmask & WRAP_ARY_FLAG, + isBind = bitmask & WRAP_BIND_FLAG, + isBindKey = bitmask & WRAP_BIND_KEY_FLAG, + isCurried = bitmask & (WRAP_CURRY_FLAG | WRAP_CURRY_RIGHT_FLAG), + isFlip = bitmask & WRAP_FLIP_FLAG, + Ctor = isBindKey ? undefined : createCtor(func); + + function wrapper() { + var length = arguments.length, + args = Array(length), + index = length; + + while (index--) { + args[index] = arguments[index]; + } + if (isCurried) { + var placeholder = getHolder(wrapper), + holdersCount = countHolders(args, placeholder); + } + if (partials) { + args = composeArgs(args, partials, holders, isCurried); + } + if (partialsRight) { + args = composeArgsRight(args, partialsRight, holdersRight, isCurried); + } + length -= holdersCount; + if (isCurried && length < arity) { + var newHolders = replaceHolders(args, placeholder); + return createRecurry( + func, bitmask, createHybrid, wrapper.placeholder, thisArg, + args, newHolders, argPos, ary, arity - length + ); + } + var thisBinding = isBind ? thisArg : this, + fn = isBindKey ? thisBinding[func] : func; + + length = args.length; + if (argPos) { + args = reorder(args, argPos); + } else if (isFlip && length > 1) { + args.reverse(); + } + if (isAry && ary < length) { + args.length = ary; + } + if (this && this !== root && this instanceof wrapper) { + fn = Ctor || createCtor(fn); + } + return fn.apply(thisBinding, args); + } + return wrapper; + } + + /** + * Creates a function like `_.invertBy`. + * + * @private + * @param {Function} setter The function to set accumulator values. + * @param {Function} toIteratee The function to resolve iteratees. + * @returns {Function} Returns the new inverter function. + */ + function createInverter(setter, toIteratee) { + return function(object, iteratee) { + return baseInverter(object, setter, toIteratee(iteratee), {}); + }; + } + + /** + * Creates a function that performs a mathematical operation on two values. + * + * @private + * @param {Function} operator The function to perform the operation. + * @param {number} [defaultValue] The value used for `undefined` arguments. + * @returns {Function} Returns the new mathematical operation function. + */ + function createMathOperation(operator, defaultValue) { + return function(value, other) { + var result; + if (value === undefined && other === undefined) { + return defaultValue; + } + if (value !== undefined) { + result = value; + } + if (other !== undefined) { + if (result === undefined) { + return other; + } + if (typeof value == 'string' || typeof other == 'string') { + value = baseToString(value); + other = baseToString(other); + } else { + value = baseToNumber(value); + other = baseToNumber(other); + } + result = operator(value, other); + } + return result; + }; + } + + /** + * Creates a function like `_.over`. + * + * @private + * @param {Function} arrayFunc The function to iterate over iteratees. + * @returns {Function} Returns the new over function. + */ + function createOver(arrayFunc) { + return flatRest(function(iteratees) { + iteratees = arrayMap(iteratees, baseUnary(getIteratee())); + return baseRest(function(args) { + var thisArg = this; + return arrayFunc(iteratees, function(iteratee) { + return apply(iteratee, thisArg, args); + }); + }); + }); + } + + /** + * Creates the padding for `string` based on `length`. The `chars` string + * is truncated if the number of characters exceeds `length`. + * + * @private + * @param {number} length The padding length. + * @param {string} [chars=' '] The string used as padding. + * @returns {string} Returns the padding for `string`. + */ + function createPadding(length, chars) { + chars = chars === undefined ? ' ' : baseToString(chars); + + var charsLength = chars.length; + if (charsLength < 2) { + return charsLength ? baseRepeat(chars, length) : chars; + } + var result = baseRepeat(chars, nativeCeil(length / stringSize(chars))); + return hasUnicode(chars) + ? castSlice(stringToArray(result), 0, length).join('') + : result.slice(0, length); + } + + /** + * Creates a function that wraps `func` to invoke it with the `this` binding + * of `thisArg` and `partials` prepended to the arguments it receives. + * + * @private + * @param {Function} func The function to wrap. + * @param {number} bitmask The bitmask flags. See `createWrap` for more details. + * @param {*} thisArg The `this` binding of `func`. + * @param {Array} partials The arguments to prepend to those provided to + * the new function. + * @returns {Function} Returns the new wrapped function. + */ + function createPartial(func, bitmask, thisArg, partials) { + var isBind = bitmask & WRAP_BIND_FLAG, + Ctor = createCtor(func); + + function wrapper() { + var argsIndex = -1, + argsLength = arguments.length, + leftIndex = -1, + leftLength = partials.length, + args = Array(leftLength + argsLength), + fn = (this && this !== root && this instanceof wrapper) ? Ctor : func; + + while (++leftIndex < leftLength) { + args[leftIndex] = partials[leftIndex]; + } + while (argsLength--) { + args[leftIndex++] = arguments[++argsIndex]; + } + return apply(fn, isBind ? thisArg : this, args); + } + return wrapper; + } + + /** + * Creates a `_.range` or `_.rangeRight` function. + * + * @private + * @param {boolean} [fromRight] Specify iterating from right to left. + * @returns {Function} Returns the new range function. + */ + function createRange(fromRight) { + return function(start, end, step) { + if (step && typeof step != 'number' && isIterateeCall(start, end, step)) { + end = step = undefined; + } + // Ensure the sign of `-0` is preserved. + start = toFinite(start); + if (end === undefined) { + end = start; + start = 0; + } else { + end = toFinite(end); + } + step = step === undefined ? (start < end ? 1 : -1) : toFinite(step); + return baseRange(start, end, step, fromRight); + }; + } + + /** + * Creates a function that performs a relational operation on two values. + * + * @private + * @param {Function} operator The function to perform the operation. + * @returns {Function} Returns the new relational operation function. + */ + function createRelationalOperation(operator) { + return function(value, other) { + if (!(typeof value == 'string' && typeof other == 'string')) { + value = toNumber(value); + other = toNumber(other); + } + return operator(value, other); + }; + } + + /** + * Creates a function that wraps `func` to continue currying. + * + * @private + * @param {Function} func The function to wrap. + * @param {number} bitmask The bitmask flags. See `createWrap` for more details. + * @param {Function} wrapFunc The function to create the `func` wrapper. + * @param {*} placeholder The placeholder value. + * @param {*} [thisArg] The `this` binding of `func`. + * @param {Array} [partials] The arguments to prepend to those provided to + * the new function. + * @param {Array} [holders] The `partials` placeholder indexes. + * @param {Array} [argPos] The argument positions of the new function. + * @param {number} [ary] The arity cap of `func`. + * @param {number} [arity] The arity of `func`. + * @returns {Function} Returns the new wrapped function. + */ + function createRecurry(func, bitmask, wrapFunc, placeholder, thisArg, partials, holders, argPos, ary, arity) { + var isCurry = bitmask & WRAP_CURRY_FLAG, + newHolders = isCurry ? holders : undefined, + newHoldersRight = isCurry ? undefined : holders, + newPartials = isCurry ? partials : undefined, + newPartialsRight = isCurry ? undefined : partials; + + bitmask |= (isCurry ? WRAP_PARTIAL_FLAG : WRAP_PARTIAL_RIGHT_FLAG); + bitmask &= ~(isCurry ? WRAP_PARTIAL_RIGHT_FLAG : WRAP_PARTIAL_FLAG); + + if (!(bitmask & WRAP_CURRY_BOUND_FLAG)) { + bitmask &= ~(WRAP_BIND_FLAG | WRAP_BIND_KEY_FLAG); + } + var newData = [ + func, bitmask, thisArg, newPartials, newHolders, newPartialsRight, + newHoldersRight, argPos, ary, arity + ]; + + var result = wrapFunc.apply(undefined, newData); + if (isLaziable(func)) { + setData(result, newData); + } + result.placeholder = placeholder; + return setWrapToString(result, func, bitmask); + } + + /** + * Creates a function like `_.round`. + * + * @private + * @param {string} methodName The name of the `Math` method to use when rounding. + * @returns {Function} Returns the new round function. + */ + function createRound(methodName) { + var func = Math[methodName]; + return function(number, precision) { + number = toNumber(number); + precision = precision == null ? 0 : nativeMin(toInteger(precision), 292); + if (precision) { + // Shift with exponential notation to avoid floating-point issues. + // See [MDN](https://mdn.io/round#Examples) for more details. + var pair = (toString(number) + 'e').split('e'), + value = func(pair[0] + 'e' + (+pair[1] + precision)); + + pair = (toString(value) + 'e').split('e'); + return +(pair[0] + 'e' + (+pair[1] - precision)); + } + return func(number); + }; + } + + /** + * Creates a set object of `values`. + * + * @private + * @param {Array} values The values to add to the set. + * @returns {Object} Returns the new set. + */ + var createSet = !(Set && (1 / setToArray(new Set([,-0]))[1]) == INFINITY) ? noop : function(values) { + return new Set(values); + }; + + /** + * Creates a `_.toPairs` or `_.toPairsIn` function. + * + * @private + * @param {Function} keysFunc The function to get the keys of a given object. + * @returns {Function} Returns the new pairs function. + */ + function createToPairs(keysFunc) { + return function(object) { + var tag = getTag(object); + if (tag == mapTag) { + return mapToArray(object); + } + if (tag == setTag) { + return setToPairs(object); + } + return baseToPairs(object, keysFunc(object)); + }; + } + + /** + * Creates a function that either curries or invokes `func` with optional + * `this` binding and partially applied arguments. + * + * @private + * @param {Function|string} func The function or method name to wrap. + * @param {number} bitmask The bitmask flags. + * 1 - `_.bind` + * 2 - `_.bindKey` + * 4 - `_.curry` or `_.curryRight` of a bound function + * 8 - `_.curry` + * 16 - `_.curryRight` + * 32 - `_.partial` + * 64 - `_.partialRight` + * 128 - `_.rearg` + * 256 - `_.ary` + * 512 - `_.flip` + * @param {*} [thisArg] The `this` binding of `func`. + * @param {Array} [partials] The arguments to be partially applied. + * @param {Array} [holders] The `partials` placeholder indexes. + * @param {Array} [argPos] The argument positions of the new function. + * @param {number} [ary] The arity cap of `func`. + * @param {number} [arity] The arity of `func`. + * @returns {Function} Returns the new wrapped function. + */ + function createWrap(func, bitmask, thisArg, partials, holders, argPos, ary, arity) { + var isBindKey = bitmask & WRAP_BIND_KEY_FLAG; + if (!isBindKey && typeof func != 'function') { + throw new TypeError(FUNC_ERROR_TEXT); + } + var length = partials ? partials.length : 0; + if (!length) { + bitmask &= ~(WRAP_PARTIAL_FLAG | WRAP_PARTIAL_RIGHT_FLAG); + partials = holders = undefined; + } + ary = ary === undefined ? ary : nativeMax(toInteger(ary), 0); + arity = arity === undefined ? arity : toInteger(arity); + length -= holders ? holders.length : 0; + + if (bitmask & WRAP_PARTIAL_RIGHT_FLAG) { + var partialsRight = partials, + holdersRight = holders; + + partials = holders = undefined; + } + var data = isBindKey ? undefined : getData(func); + + var newData = [ + func, bitmask, thisArg, partials, holders, partialsRight, holdersRight, + argPos, ary, arity + ]; + + if (data) { + mergeData(newData, data); + } + func = newData[0]; + bitmask = newData[1]; + thisArg = newData[2]; + partials = newData[3]; + holders = newData[4]; + arity = newData[9] = newData[9] === undefined + ? (isBindKey ? 0 : func.length) + : nativeMax(newData[9] - length, 0); + + if (!arity && bitmask & (WRAP_CURRY_FLAG | WRAP_CURRY_RIGHT_FLAG)) { + bitmask &= ~(WRAP_CURRY_FLAG | WRAP_CURRY_RIGHT_FLAG); + } + if (!bitmask || bitmask == WRAP_BIND_FLAG) { + var result = createBind(func, bitmask, thisArg); + } else if (bitmask == WRAP_CURRY_FLAG || bitmask == WRAP_CURRY_RIGHT_FLAG) { + result = createCurry(func, bitmask, arity); + } else if ((bitmask == WRAP_PARTIAL_FLAG || bitmask == (WRAP_BIND_FLAG | WRAP_PARTIAL_FLAG)) && !holders.length) { + result = createPartial(func, bitmask, thisArg, partials); + } else { + result = createHybrid.apply(undefined, newData); + } + var setter = data ? baseSetData : setData; + return setWrapToString(setter(result, newData), func, bitmask); + } + + /** + * Used by `_.defaults` to customize its `_.assignIn` use to assign properties + * of source objects to the destination object for all destination properties + * that resolve to `undefined`. + * + * @private + * @param {*} objValue The destination value. + * @param {*} srcValue The source value. + * @param {string} key The key of the property to assign. + * @param {Object} object The parent object of `objValue`. + * @returns {*} Returns the value to assign. + */ + function customDefaultsAssignIn(objValue, srcValue, key, object) { + if (objValue === undefined || + (eq(objValue, objectProto[key]) && !hasOwnProperty.call(object, key))) { + return srcValue; + } + return objValue; + } + + /** + * Used by `_.defaultsDeep` to customize its `_.merge` use to merge source + * objects into destination objects that are passed thru. + * + * @private + * @param {*} objValue The destination value. + * @param {*} srcValue The source value. + * @param {string} key The key of the property to merge. + * @param {Object} object The parent object of `objValue`. + * @param {Object} source The parent object of `srcValue`. + * @param {Object} [stack] Tracks traversed source values and their merged + * counterparts. + * @returns {*} Returns the value to assign. + */ + function customDefaultsMerge(objValue, srcValue, key, object, source, stack) { + if (isObject(objValue) && isObject(srcValue)) { + // Recursively merge objects and arrays (susceptible to call stack limits). + stack.set(srcValue, objValue); + baseMerge(objValue, srcValue, undefined, customDefaultsMerge, stack); + stack['delete'](srcValue); + } + return objValue; + } + + /** + * Used by `_.omit` to customize its `_.cloneDeep` use to only clone plain + * objects. + * + * @private + * @param {*} value The value to inspect. + * @param {string} key The key of the property to inspect. + * @returns {*} Returns the uncloned value or `undefined` to defer cloning to `_.cloneDeep`. + */ + function customOmitClone(value) { + return isPlainObject(value) ? undefined : value; + } + + /** + * A specialized version of `baseIsEqualDeep` for arrays with support for + * partial deep comparisons. + * + * @private + * @param {Array} array The array to compare. + * @param {Array} other The other array to compare. + * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details. + * @param {Function} customizer The function to customize comparisons. + * @param {Function} equalFunc The function to determine equivalents of values. + * @param {Object} stack Tracks traversed `array` and `other` objects. + * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`. + */ + function equalArrays(array, other, bitmask, customizer, equalFunc, stack) { + var isPartial = bitmask & COMPARE_PARTIAL_FLAG, + arrLength = array.length, + othLength = other.length; + + if (arrLength != othLength && !(isPartial && othLength > arrLength)) { + return false; + } + // Assume cyclic values are equal. + var stacked = stack.get(array); + if (stacked && stack.get(other)) { + return stacked == other; + } + var index = -1, + result = true, + seen = (bitmask & COMPARE_UNORDERED_FLAG) ? new SetCache : undefined; + + stack.set(array, other); + stack.set(other, array); + + // Ignore non-index properties. + while (++index < arrLength) { + var arrValue = array[index], + othValue = other[index]; + + if (customizer) { + var compared = isPartial + ? customizer(othValue, arrValue, index, other, array, stack) + : customizer(arrValue, othValue, index, array, other, stack); + } + if (compared !== undefined) { + if (compared) { + continue; + } + result = false; + break; + } + // Recursively compare arrays (susceptible to call stack limits). + if (seen) { + if (!arraySome(other, function(othValue, othIndex) { + if (!cacheHas(seen, othIndex) && + (arrValue === othValue || equalFunc(arrValue, othValue, bitmask, customizer, stack))) { + return seen.push(othIndex); + } + })) { + result = false; + break; + } + } else if (!( + arrValue === othValue || + equalFunc(arrValue, othValue, bitmask, customizer, stack) + )) { + result = false; + break; + } + } + stack['delete'](array); + stack['delete'](other); + return result; + } + + /** + * A specialized version of `baseIsEqualDeep` for comparing objects of + * the same `toStringTag`. + * + * **Note:** This function only supports comparing values with tags of + * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`. + * + * @private + * @param {Object} object The object to compare. + * @param {Object} other The other object to compare. + * @param {string} tag The `toStringTag` of the objects to compare. + * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details. + * @param {Function} customizer The function to customize comparisons. + * @param {Function} equalFunc The function to determine equivalents of values. + * @param {Object} stack Tracks traversed `object` and `other` objects. + * @returns {boolean} Returns `true` if the objects are equivalent, else `false`. + */ + function equalByTag(object, other, tag, bitmask, customizer, equalFunc, stack) { + switch (tag) { + case dataViewTag: + if ((object.byteLength != other.byteLength) || + (object.byteOffset != other.byteOffset)) { + return false; + } + object = object.buffer; + other = other.buffer; + + case arrayBufferTag: + if ((object.byteLength != other.byteLength) || + !equalFunc(new Uint8Array(object), new Uint8Array(other))) { + return false; + } + return true; + + case boolTag: + case dateTag: + case numberTag: + // Coerce booleans to `1` or `0` and dates to milliseconds. + // Invalid dates are coerced to `NaN`. + return eq(+object, +other); + + case errorTag: + return object.name == other.name && object.message == other.message; + + case regexpTag: + case stringTag: + // Coerce regexes to strings and treat strings, primitives and objects, + // as equal. See http://www.ecma-international.org/ecma-262/7.0/#sec-regexp.prototype.tostring + // for more details. + return object == (other + ''); + + case mapTag: + var convert = mapToArray; + + case setTag: + var isPartial = bitmask & COMPARE_PARTIAL_FLAG; + convert || (convert = setToArray); + + if (object.size != other.size && !isPartial) { + return false; + } + // Assume cyclic values are equal. + var stacked = stack.get(object); + if (stacked) { + return stacked == other; + } + bitmask |= COMPARE_UNORDERED_FLAG; + + // Recursively compare objects (susceptible to call stack limits). + stack.set(object, other); + var result = equalArrays(convert(object), convert(other), bitmask, customizer, equalFunc, stack); + stack['delete'](object); + return result; + + case symbolTag: + if (symbolValueOf) { + return symbolValueOf.call(object) == symbolValueOf.call(other); + } + } + return false; + } + + /** + * A specialized version of `baseIsEqualDeep` for objects with support for + * partial deep comparisons. + * + * @private + * @param {Object} object The object to compare. + * @param {Object} other The other object to compare. + * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details. + * @param {Function} customizer The function to customize comparisons. + * @param {Function} equalFunc The function to determine equivalents of values. + * @param {Object} stack Tracks traversed `object` and `other` objects. + * @returns {boolean} Returns `true` if the objects are equivalent, else `false`. + */ + function equalObjects(object, other, bitmask, customizer, equalFunc, stack) { + var isPartial = bitmask & COMPARE_PARTIAL_FLAG, + objProps = getAllKeys(object), + objLength = objProps.length, + othProps = getAllKeys(other), + othLength = othProps.length; + + if (objLength != othLength && !isPartial) { + return false; + } + var index = objLength; + while (index--) { + var key = objProps[index]; + if (!(isPartial ? key in other : hasOwnProperty.call(other, key))) { + return false; + } + } + // Assume cyclic values are equal. + var stacked = stack.get(object); + if (stacked && stack.get(other)) { + return stacked == other; + } + var result = true; + stack.set(object, other); + stack.set(other, object); + + var skipCtor = isPartial; + while (++index < objLength) { + key = objProps[index]; + var objValue = object[key], + othValue = other[key]; + + if (customizer) { + var compared = isPartial + ? customizer(othValue, objValue, key, other, object, stack) + : customizer(objValue, othValue, key, object, other, stack); + } + // Recursively compare objects (susceptible to call stack limits). + if (!(compared === undefined + ? (objValue === othValue || equalFunc(objValue, othValue, bitmask, customizer, stack)) + : compared + )) { + result = false; + break; + } + skipCtor || (skipCtor = key == 'constructor'); + } + if (result && !skipCtor) { + var objCtor = object.constructor, + othCtor = other.constructor; + + // Non `Object` object instances with different constructors are not equal. + if (objCtor != othCtor && + ('constructor' in object && 'constructor' in other) && + !(typeof objCtor == 'function' && objCtor instanceof objCtor && + typeof othCtor == 'function' && othCtor instanceof othCtor)) { + result = false; + } + } + stack['delete'](object); + stack['delete'](other); + return result; + } + + /** + * A specialized version of `baseRest` which flattens the rest array. + * + * @private + * @param {Function} func The function to apply a rest parameter to. + * @returns {Function} Returns the new function. + */ + function flatRest(func) { + return setToString(overRest(func, undefined, flatten), func + ''); + } + + /** + * Creates an array of own enumerable property names and symbols of `object`. + * + * @private + * @param {Object} object The object to query. + * @returns {Array} Returns the array of property names and symbols. + */ + function getAllKeys(object) { + return baseGetAllKeys(object, keys, getSymbols); + } + + /** + * Creates an array of own and inherited enumerable property names and + * symbols of `object`. + * + * @private + * @param {Object} object The object to query. + * @returns {Array} Returns the array of property names and symbols. + */ + function getAllKeysIn(object) { + return baseGetAllKeys(object, keysIn, getSymbolsIn); + } + + /** + * Gets metadata for `func`. + * + * @private + * @param {Function} func The function to query. + * @returns {*} Returns the metadata for `func`. + */ + var getData = !metaMap ? noop : function(func) { + return metaMap.get(func); + }; + + /** + * Gets the name of `func`. + * + * @private + * @param {Function} func The function to query. + * @returns {string} Returns the function name. + */ + function getFuncName(func) { + var result = (func.name + ''), + array = realNames[result], + length = hasOwnProperty.call(realNames, result) ? array.length : 0; + + while (length--) { + var data = array[length], + otherFunc = data.func; + if (otherFunc == null || otherFunc == func) { + return data.name; + } + } + return result; + } + + /** + * Gets the argument placeholder value for `func`. + * + * @private + * @param {Function} func The function to inspect. + * @returns {*} Returns the placeholder value. + */ + function getHolder(func) { + var object = hasOwnProperty.call(lodash, 'placeholder') ? lodash : func; + return object.placeholder; + } + + /** + * Gets the appropriate "iteratee" function. If `_.iteratee` is customized, + * this function returns the custom method, otherwise it returns `baseIteratee`. + * If arguments are provided, the chosen function is invoked with them and + * its result is returned. + * + * @private + * @param {*} [value] The value to convert to an iteratee. + * @param {number} [arity] The arity of the created iteratee. + * @returns {Function} Returns the chosen function or its result. + */ + function getIteratee() { + var result = lodash.iteratee || iteratee; + result = result === iteratee ? baseIteratee : result; + return arguments.length ? result(arguments[0], arguments[1]) : result; + } + + /** + * Gets the data for `map`. + * + * @private + * @param {Object} map The map to query. + * @param {string} key The reference key. + * @returns {*} Returns the map data. + */ + function getMapData(map, key) { + var data = map.__data__; + return isKeyable(key) + ? data[typeof key == 'string' ? 'string' : 'hash'] + : data.map; + } + + /** + * Gets the property names, values, and compare flags of `object`. + * + * @private + * @param {Object} object The object to query. + * @returns {Array} Returns the match data of `object`. + */ + function getMatchData(object) { + var result = keys(object), + length = result.length; + + while (length--) { + var key = result[length], + value = object[key]; + + result[length] = [key, value, isStrictComparable(value)]; + } + return result; + } + + /** + * Gets the native function at `key` of `object`. + * + * @private + * @param {Object} object The object to query. + * @param {string} key The key of the method to get. + * @returns {*} Returns the function if it's native, else `undefined`. + */ + function getNative(object, key) { + var value = getValue(object, key); + return baseIsNative(value) ? value : undefined; + } + + /** + * A specialized version of `baseGetTag` which ignores `Symbol.toStringTag` values. + * + * @private + * @param {*} value The value to query. + * @returns {string} Returns the raw `toStringTag`. + */ + function getRawTag(value) { + var isOwn = hasOwnProperty.call(value, symToStringTag), + tag = value[symToStringTag]; + + try { + value[symToStringTag] = undefined; + var unmasked = true; + } catch (e) {} + + var result = nativeObjectToString.call(value); + if (unmasked) { + if (isOwn) { + value[symToStringTag] = tag; + } else { + delete value[symToStringTag]; + } + } + return result; + } + + /** + * Creates an array of the own enumerable symbols of `object`. + * + * @private + * @param {Object} object The object to query. + * @returns {Array} Returns the array of symbols. + */ + var getSymbols = !nativeGetSymbols ? stubArray : function(object) { + if (object == null) { + return []; + } + object = Object(object); + return arrayFilter(nativeGetSymbols(object), function(symbol) { + return propertyIsEnumerable.call(object, symbol); + }); + }; + + /** + * Creates an array of the own and inherited enumerable symbols of `object`. + * + * @private + * @param {Object} object The object to query. + * @returns {Array} Returns the array of symbols. + */ + var getSymbolsIn = !nativeGetSymbols ? stubArray : function(object) { + var result = []; + while (object) { + arrayPush(result, getSymbols(object)); + object = getPrototype(object); + } + return result; + }; + + /** + * Gets the `toStringTag` of `value`. + * + * @private + * @param {*} value The value to query. + * @returns {string} Returns the `toStringTag`. + */ + var getTag = baseGetTag; + + // Fallback for data views, maps, sets, and weak maps in IE 11 and promises in Node.js < 6. + if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) || + (Map && getTag(new Map) != mapTag) || + (Promise && getTag(Promise.resolve()) != promiseTag) || + (Set && getTag(new Set) != setTag) || + (WeakMap && getTag(new WeakMap) != weakMapTag)) { + getTag = function(value) { + var result = baseGetTag(value), + Ctor = result == objectTag ? value.constructor : undefined, + ctorString = Ctor ? toSource(Ctor) : ''; + + if (ctorString) { + switch (ctorString) { + case dataViewCtorString: return dataViewTag; + case mapCtorString: return mapTag; + case promiseCtorString: return promiseTag; + case setCtorString: return setTag; + case weakMapCtorString: return weakMapTag; + } + } + return result; + }; + } + + /** + * Gets the view, applying any `transforms` to the `start` and `end` positions. + * + * @private + * @param {number} start The start of the view. + * @param {number} end The end of the view. + * @param {Array} transforms The transformations to apply to the view. + * @returns {Object} Returns an object containing the `start` and `end` + * positions of the view. + */ + function getView(start, end, transforms) { + var index = -1, + length = transforms.length; + + while (++index < length) { + var data = transforms[index], + size = data.size; + + switch (data.type) { + case 'drop': start += size; break; + case 'dropRight': end -= size; break; + case 'take': end = nativeMin(end, start + size); break; + case 'takeRight': start = nativeMax(start, end - size); break; + } + } + return { 'start': start, 'end': end }; + } + + /** + * Extracts wrapper details from the `source` body comment. + * + * @private + * @param {string} source The source to inspect. + * @returns {Array} Returns the wrapper details. + */ + function getWrapDetails(source) { + var match = source.match(reWrapDetails); + return match ? match[1].split(reSplitDetails) : []; + } + + /** + * Checks if `path` exists on `object`. + * + * @private + * @param {Object} object The object to query. + * @param {Array|string} path The path to check. + * @param {Function} hasFunc The function to check properties. + * @returns {boolean} Returns `true` if `path` exists, else `false`. + */ + function hasPath(object, path, hasFunc) { + path = castPath(path, object); + + var index = -1, + length = path.length, + result = false; + + while (++index < length) { + var key = toKey(path[index]); + if (!(result = object != null && hasFunc(object, key))) { + break; + } + object = object[key]; + } + if (result || ++index != length) { + return result; + } + length = object == null ? 0 : object.length; + return !!length && isLength(length) && isIndex(key, length) && + (isArray(object) || isArguments(object)); + } + + /** + * Initializes an array clone. + * + * @private + * @param {Array} array The array to clone. + * @returns {Array} Returns the initialized clone. + */ + function initCloneArray(array) { + var length = array.length, + result = new array.constructor(length); + + // Add properties assigned by `RegExp#exec`. + if (length && typeof array[0] == 'string' && hasOwnProperty.call(array, 'index')) { + result.index = array.index; + result.input = array.input; + } + return result; + } + + /** + * Initializes an object clone. + * + * @private + * @param {Object} object The object to clone. + * @returns {Object} Returns the initialized clone. + */ + function initCloneObject(object) { + return (typeof object.constructor == 'function' && !isPrototype(object)) + ? baseCreate(getPrototype(object)) + : {}; + } + + /** + * Initializes an object clone based on its `toStringTag`. + * + * **Note:** This function only supports cloning values with tags of + * `Boolean`, `Date`, `Error`, `Map`, `Number`, `RegExp`, `Set`, or `String`. + * + * @private + * @param {Object} object The object to clone. + * @param {string} tag The `toStringTag` of the object to clone. + * @param {boolean} [isDeep] Specify a deep clone. + * @returns {Object} Returns the initialized clone. + */ + function initCloneByTag(object, tag, isDeep) { + var Ctor = object.constructor; + switch (tag) { + case arrayBufferTag: + return cloneArrayBuffer(object); + + case boolTag: + case dateTag: + return new Ctor(+object); + + case dataViewTag: + return cloneDataView(object, isDeep); + + case float32Tag: case float64Tag: + case int8Tag: case int16Tag: case int32Tag: + case uint8Tag: case uint8ClampedTag: case uint16Tag: case uint32Tag: + return cloneTypedArray(object, isDeep); + + case mapTag: + return new Ctor; + + case numberTag: + case stringTag: + return new Ctor(object); + + case regexpTag: + return cloneRegExp(object); + + case setTag: + return new Ctor; + + case symbolTag: + return cloneSymbol(object); + } + } + + /** + * Inserts wrapper `details` in a comment at the top of the `source` body. + * + * @private + * @param {string} source The source to modify. + * @returns {Array} details The details to insert. + * @returns {string} Returns the modified source. + */ + function insertWrapDetails(source, details) { + var length = details.length; + if (!length) { + return source; + } + var lastIndex = length - 1; + details[lastIndex] = (length > 1 ? '& ' : '') + details[lastIndex]; + details = details.join(length > 2 ? ', ' : ' '); + return source.replace(reWrapComment, '{\n/* [wrapped with ' + details + '] */\n'); + } + + /** + * Checks if `value` is a flattenable `arguments` object or array. + * + * @private + * @param {*} value The value to check. + * @returns {boolean} Returns `true` if `value` is flattenable, else `false`. + */ + function isFlattenable(value) { + return isArray(value) || isArguments(value) || + !!(spreadableSymbol && value && value[spreadableSymbol]); + } + + /** + * Checks if `value` is a valid array-like index. + * + * @private + * @param {*} value The value to check. + * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index. + * @returns {boolean} Returns `true` if `value` is a valid index, else `false`. + */ + function isIndex(value, length) { + var type = typeof value; + length = length == null ? MAX_SAFE_INTEGER : length; + + return !!length && + (type == 'number' || + (type != 'symbol' && reIsUint.test(value))) && + (value > -1 && value % 1 == 0 && value < length); + } + + /** + * Checks if the given arguments are from an iteratee call. + * + * @private + * @param {*} value The potential iteratee value argument. + * @param {*} index The potential iteratee index or key argument. + * @param {*} object The potential iteratee object argument. + * @returns {boolean} Returns `true` if the arguments are from an iteratee call, + * else `false`. + */ + function isIterateeCall(value, index, object) { + if (!isObject(object)) { + return false; + } + var type = typeof index; + if (type == 'number' + ? (isArrayLike(object) && isIndex(index, object.length)) + : (type == 'string' && index in object) + ) { + return eq(object[index], value); + } + return false; + } + + /** + * Checks if `value` is a property name and not a property path. + * + * @private + * @param {*} value The value to check. + * @param {Object} [object] The object to query keys on. + * @returns {boolean} Returns `true` if `value` is a property name, else `false`. + */ + function isKey(value, object) { + if (isArray(value)) { + return false; + } + var type = typeof value; + if (type == 'number' || type == 'symbol' || type == 'boolean' || + value == null || isSymbol(value)) { + return true; + } + return reIsPlainProp.test(value) || !reIsDeepProp.test(value) || + (object != null && value in Object(object)); + } + + /** + * Checks if `value` is suitable for use as unique object key. + * + * @private + * @param {*} value The value to check. + * @returns {boolean} Returns `true` if `value` is suitable, else `false`. + */ + function isKeyable(value) { + var type = typeof value; + return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean') + ? (value !== '__proto__') + : (value === null); + } + + /** + * Checks if `func` has a lazy counterpart. + * + * @private + * @param {Function} func The function to check. + * @returns {boolean} Returns `true` if `func` has a lazy counterpart, + * else `false`. + */ + function isLaziable(func) { + var funcName = getFuncName(func), + other = lodash[funcName]; + + if (typeof other != 'function' || !(funcName in LazyWrapper.prototype)) { + return false; + } + if (func === other) { + return true; + } + var data = getData(other); + return !!data && func === data[0]; + } + + /** + * Checks if `func` has its source masked. + * + * @private + * @param {Function} func The function to check. + * @returns {boolean} Returns `true` if `func` is masked, else `false`. + */ + function isMasked(func) { + return !!maskSrcKey && (maskSrcKey in func); + } + + /** + * Checks if `func` is capable of being masked. + * + * @private + * @param {*} value The value to check. + * @returns {boolean} Returns `true` if `func` is maskable, else `false`. + */ + var isMaskable = coreJsData ? isFunction : stubFalse; + + /** + * Checks if `value` is likely a prototype object. + * + * @private + * @param {*} value The value to check. + * @returns {boolean} Returns `true` if `value` is a prototype, else `false`. + */ + function isPrototype(value) { + var Ctor = value && value.constructor, + proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto; + + return value === proto; + } + + /** + * Checks if `value` is suitable for strict equality comparisons, i.e. `===`. + * + * @private + * @param {*} value The value to check. + * @returns {boolean} Returns `true` if `value` if suitable for strict + * equality comparisons, else `false`. + */ + function isStrictComparable(value) { + return value === value && !isObject(value); + } + + /** + * A specialized version of `matchesProperty` for source values suitable + * for strict equality comparisons, i.e. `===`. + * + * @private + * @param {string} key The key of the property to get. + * @param {*} srcValue The value to match. + * @returns {Function} Returns the new spec function. + */ + function matchesStrictComparable(key, srcValue) { + return function(object) { + if (object == null) { + return false; + } + return object[key] === srcValue && + (srcValue !== undefined || (key in Object(object))); + }; + } + + /** + * A specialized version of `_.memoize` which clears the memoized function's + * cache when it exceeds `MAX_MEMOIZE_SIZE`. + * + * @private + * @param {Function} func The function to have its output memoized. + * @returns {Function} Returns the new memoized function. + */ + function memoizeCapped(func) { + var result = memoize(func, function(key) { + if (cache.size === MAX_MEMOIZE_SIZE) { + cache.clear(); + } + return key; + }); + + var cache = result.cache; + return result; + } + + /** + * Merges the function metadata of `source` into `data`. + * + * Merging metadata reduces the number of wrappers used to invoke a function. + * This is possible because methods like `_.bind`, `_.curry`, and `_.partial` + * may be applied regardless of execution order. Methods like `_.ary` and + * `_.rearg` modify function arguments, making the order in which they are + * executed important, preventing the merging of metadata. However, we make + * an exception for a safe combined case where curried functions have `_.ary` + * and or `_.rearg` applied. + * + * @private + * @param {Array} data The destination metadata. + * @param {Array} source The source metadata. + * @returns {Array} Returns `data`. + */ + function mergeData(data, source) { + var bitmask = data[1], + srcBitmask = source[1], + newBitmask = bitmask | srcBitmask, + isCommon = newBitmask < (WRAP_BIND_FLAG | WRAP_BIND_KEY_FLAG | WRAP_ARY_FLAG); + + var isCombo = + ((srcBitmask == WRAP_ARY_FLAG) && (bitmask == WRAP_CURRY_FLAG)) || + ((srcBitmask == WRAP_ARY_FLAG) && (bitmask == WRAP_REARG_FLAG) && (data[7].length <= source[8])) || + ((srcBitmask == (WRAP_ARY_FLAG | WRAP_REARG_FLAG)) && (source[7].length <= source[8]) && (bitmask == WRAP_CURRY_FLAG)); + + // Exit early if metadata can't be merged. + if (!(isCommon || isCombo)) { + return data; + } + // Use source `thisArg` if available. + if (srcBitmask & WRAP_BIND_FLAG) { + data[2] = source[2]; + // Set when currying a bound function. + newBitmask |= bitmask & WRAP_BIND_FLAG ? 0 : WRAP_CURRY_BOUND_FLAG; + } + // Compose partial arguments. + var value = source[3]; + if (value) { + var partials = data[3]; + data[3] = partials ? composeArgs(partials, value, source[4]) : value; + data[4] = partials ? replaceHolders(data[3], PLACEHOLDER) : source[4]; + } + // Compose partial right arguments. + value = source[5]; + if (value) { + partials = data[5]; + data[5] = partials ? composeArgsRight(partials, value, source[6]) : value; + data[6] = partials ? replaceHolders(data[5], PLACEHOLDER) : source[6]; + } + // Use source `argPos` if available. + value = source[7]; + if (value) { + data[7] = value; + } + // Use source `ary` if it's smaller. + if (srcBitmask & WRAP_ARY_FLAG) { + data[8] = data[8] == null ? source[8] : nativeMin(data[8], source[8]); + } + // Use source `arity` if one is not provided. + if (data[9] == null) { + data[9] = source[9]; + } + // Use source `func` and merge bitmasks. + data[0] = source[0]; + data[1] = newBitmask; + + return data; + } + + /** + * This function is like + * [`Object.keys`](http://ecma-international.org/ecma-262/7.0/#sec-object.keys) + * except that it includes inherited enumerable properties. + * + * @private + * @param {Object} object The object to query. + * @returns {Array} Returns the array of property names. + */ + function nativeKeysIn(object) { + var result = []; + if (object != null) { + for (var key in Object(object)) { + result.push(key); + } + } + return result; + } + + /** + * Converts `value` to a string using `Object.prototype.toString`. + * + * @private + * @param {*} value The value to convert. + * @returns {string} Returns the converted string. + */ + function objectToString(value) { + return nativeObjectToString.call(value); + } + + /** + * A specialized version of `baseRest` which transforms the rest array. + * + * @private + * @param {Function} func The function to apply a rest parameter to. + * @param {number} [start=func.length-1] The start position of the rest parameter. + * @param {Function} transform The rest array transform. + * @returns {Function} Returns the new function. + */ + function overRest(func, start, transform) { + start = nativeMax(start === undefined ? (func.length - 1) : start, 0); + return function() { + var args = arguments, + index = -1, + length = nativeMax(args.length - start, 0), + array = Array(length); + + while (++index < length) { + array[index] = args[start + index]; + } + index = -1; + var otherArgs = Array(start + 1); + while (++index < start) { + otherArgs[index] = args[index]; + } + otherArgs[start] = transform(array); + return apply(func, this, otherArgs); + }; + } + + /** + * Gets the parent value at `path` of `object`. + * + * @private + * @param {Object} object The object to query. + * @param {Array} path The path to get the parent value of. + * @returns {*} Returns the parent value. + */ + function parent(object, path) { + return path.length < 2 ? object : baseGet(object, baseSlice(path, 0, -1)); + } + + /** + * Reorder `array` according to the specified indexes where the element at + * the first index is assigned as the first element, the element at + * the second index is assigned as the second element, and so on. + * + * @private + * @param {Array} array The array to reorder. + * @param {Array} indexes The arranged array indexes. + * @returns {Array} Returns `array`. + */ + function reorder(array, indexes) { + var arrLength = array.length, + length = nativeMin(indexes.length, arrLength), + oldArray = copyArray(array); + + while (length--) { + var index = indexes[length]; + array[length] = isIndex(index, arrLength) ? oldArray[index] : undefined; + } + return array; + } + + /** + * Gets the value at `key`, unless `key` is "__proto__". + * + * @private + * @param {Object} object The object to query. + * @param {string} key The key of the property to get. + * @returns {*} Returns the property value. + */ + function safeGet(object, key) { + if (key == '__proto__') { + return; + } + + return object[key]; + } + + /** + * Sets metadata for `func`. + * + * **Note:** If this function becomes hot, i.e. is invoked a lot in a short + * period of time, it will trip its breaker and transition to an identity + * function to avoid garbage collection pauses in V8. See + * [V8 issue 2070](https://bugs.chromium.org/p/v8/issues/detail?id=2070) + * for more details. + * + * @private + * @param {Function} func The function to associate metadata with. + * @param {*} data The metadata. + * @returns {Function} Returns `func`. + */ + var setData = shortOut(baseSetData); + + /** + * A simple wrapper around the global [`setTimeout`](https://mdn.io/setTimeout). + * + * @private + * @param {Function} func The function to delay. + * @param {number} wait The number of milliseconds to delay invocation. + * @returns {number|Object} Returns the timer id or timeout object. + */ + var setTimeout = ctxSetTimeout || function(func, wait) { + return root.setTimeout(func, wait); + }; + + /** + * Sets the `toString` method of `func` to return `string`. + * + * @private + * @param {Function} func The function to modify. + * @param {Function} string The `toString` result. + * @returns {Function} Returns `func`. + */ + var setToString = shortOut(baseSetToString); + + /** + * Sets the `toString` method of `wrapper` to mimic the source of `reference` + * with wrapper details in a comment at the top of the source body. + * + * @private + * @param {Function} wrapper The function to modify. + * @param {Function} reference The reference function. + * @param {number} bitmask The bitmask flags. See `createWrap` for more details. + * @returns {Function} Returns `wrapper`. + */ + function setWrapToString(wrapper, reference, bitmask) { + var source = (reference + ''); + return setToString(wrapper, insertWrapDetails(source, updateWrapDetails(getWrapDetails(source), bitmask))); + } + + /** + * Creates a function that'll short out and invoke `identity` instead + * of `func` when it's called `HOT_COUNT` or more times in `HOT_SPAN` + * milliseconds. + * + * @private + * @param {Function} func The function to restrict. + * @returns {Function} Returns the new shortable function. + */ + function shortOut(func) { + var count = 0, + lastCalled = 0; + + return function() { + var stamp = nativeNow(), + remaining = HOT_SPAN - (stamp - lastCalled); + + lastCalled = stamp; + if (remaining > 0) { + if (++count >= HOT_COUNT) { + return arguments[0]; + } + } else { + count = 0; + } + return func.apply(undefined, arguments); + }; + } + + /** + * A specialized version of `_.shuffle` which mutates and sets the size of `array`. + * + * @private + * @param {Array} array The array to shuffle. + * @param {number} [size=array.length] The size of `array`. + * @returns {Array} Returns `array`. + */ + function shuffleSelf(array, size) { + var index = -1, + length = array.length, + lastIndex = length - 1; + + size = size === undefined ? length : size; + while (++index < size) { + var rand = baseRandom(index, lastIndex), + value = array[rand]; + + array[rand] = array[index]; + array[index] = value; + } + array.length = size; + return array; + } + + /** + * Converts `string` to a property path array. + * + * @private + * @param {string} string The string to convert. + * @returns {Array} Returns the property path array. + */ + var stringToPath = memoizeCapped(function(string) { + var result = []; + if (string.charCodeAt(0) === 46 /* . */) { + result.push(''); + } + string.replace(rePropName, function(match, number, quote, subString) { + result.push(quote ? subString.replace(reEscapeChar, '$1') : (number || match)); + }); + return result; + }); + + /** + * Converts `value` to a string key if it's not a string or symbol. + * + * @private + * @param {*} value The value to inspect. + * @returns {string|symbol} Returns the key. + */ + function toKey(value) { + if (typeof value == 'string' || isSymbol(value)) { + return value; + } + var result = (value + ''); + return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result; + } + + /** + * Converts `func` to its source code. + * + * @private + * @param {Function} func The function to convert. + * @returns {string} Returns the source code. + */ + function toSource(func) { + if (func != null) { + try { + return funcToString.call(func); + } catch (e) {} + try { + return (func + ''); + } catch (e) {} + } + return ''; + } + + /** + * Updates wrapper `details` based on `bitmask` flags. + * + * @private + * @returns {Array} details The details to modify. + * @param {number} bitmask The bitmask flags. See `createWrap` for more details. + * @returns {Array} Returns `details`. + */ + function updateWrapDetails(details, bitmask) { + arrayEach(wrapFlags, function(pair) { + var value = '_.' + pair[0]; + if ((bitmask & pair[1]) && !arrayIncludes(details, value)) { + details.push(value); + } + }); + return details.sort(); + } + + /** + * Creates a clone of `wrapper`. + * + * @private + * @param {Object} wrapper The wrapper to clone. + * @returns {Object} Returns the cloned wrapper. + */ + function wrapperClone(wrapper) { + if (wrapper instanceof LazyWrapper) { + return wrapper.clone(); + } + var result = new LodashWrapper(wrapper.__wrapped__, wrapper.__chain__); + result.__actions__ = copyArray(wrapper.__actions__); + result.__index__ = wrapper.__index__; + result.__values__ = wrapper.__values__; + return result; + } + + /*------------------------------------------------------------------------*/ + + /** + * Creates an array of elements split into groups the length of `size`. + * If `array` can't be split evenly, the final chunk will be the remaining + * elements. + * + * @static + * @memberOf _ + * @since 3.0.0 + * @category Array + * @param {Array} array The array to process. + * @param {number} [size=1] The length of each chunk + * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`. + * @returns {Array} Returns the new array of chunks. + * @example + * + * _.chunk(['a', 'b', 'c', 'd'], 2); + * // => [['a', 'b'], ['c', 'd']] + * + * _.chunk(['a', 'b', 'c', 'd'], 3); + * // => [['a', 'b', 'c'], ['d']] + */ + function chunk(array, size, guard) { + if ((guard ? isIterateeCall(array, size, guard) : size === undefined)) { + size = 1; + } else { + size = nativeMax(toInteger(size), 0); + } + var length = array == null ? 0 : array.length; + if (!length || size < 1) { + return []; + } + var index = 0, + resIndex = 0, + result = Array(nativeCeil(length / size)); + + while (index < length) { + result[resIndex++] = baseSlice(array, index, (index += size)); + } + return result; + } + + /** + * Creates an array with all falsey values removed. The values `false`, `null`, + * `0`, `""`, `undefined`, and `NaN` are falsey. + * + * @static + * @memberOf _ + * @since 0.1.0 + * @category Array + * @param {Array} array The array to compact. + * @returns {Array} Returns the new array of filtered values. + * @example + * + * _.compact([0, 1, false, 2, '', 3]); + * // => [1, 2, 3] + */ + function compact(array) { + var index = -1, + length = array == null ? 0 : array.length, + resIndex = 0, + result = []; + + while (++index < length) { + var value = array[index]; + if (value) { + result[resIndex++] = value; + } + } + return result; + } + + /** + * Creates a new array concatenating `array` with any additional arrays + * and/or values. + * + * @static + * @memberOf _ + * @since 4.0.0 + * @category Array + * @param {Array} array The array to concatenate. + * @param {...*} [values] The values to concatenate. + * @returns {Array} Returns the new concatenated array. + * @example + * + * var array = [1]; + * var other = _.concat(array, 2, [3], [[4]]); + * + * console.log(other); + * // => [1, 2, 3, [4]] + * + * console.log(array); + * // => [1] + */ + function concat() { + var length = arguments.length; + if (!length) { + return []; + } + var args = Array(length - 1), + array = arguments[0], + index = length; + + while (index--) { + args[index - 1] = arguments[index]; + } + return arrayPush(isArray(array) ? copyArray(array) : [array], baseFlatten(args, 1)); + } + + /** + * Creates an array of `array` values not included in the other given arrays + * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero) + * for equality comparisons. The order and references of result values are + * determined by the first array. + * + * **Note:** Unlike `_.pullAll`, this method returns a new array. + * + * @static + * @memberOf _ + * @since 0.1.0 + * @category Array + * @param {Array} array The array to inspect. + * @param {...Array} [values] The values to exclude. + * @returns {Array} Returns the new array of filtered values. + * @see _.without, _.xor + * @example + * + * _.difference([2, 1], [2, 3]); + * // => [1] + */ + var difference = baseRest(function(array, values) { + return isArrayLikeObject(array) + ? baseDifference(array, baseFlatten(values, 1, isArrayLikeObject, true)) + : []; + }); + + /** + * This method is like `_.difference` except that it accepts `iteratee` which + * is invoked for each element of `array` and `values` to generate the criterion + * by which they're compared. The order and references of result values are + * determined by the first array. The iteratee is invoked with one argument: + * (value). + * + * **Note:** Unlike `_.pullAllBy`, this method returns a new array. + * + * @static + * @memberOf _ + * @since 4.0.0 + * @category Array + * @param {Array} array The array to inspect. + * @param {...Array} [values] The values to exclude. + * @param {Function} [iteratee=_.identity] The iteratee invoked per element. + * @returns {Array} Returns the new array of filtered values. + * @example + * + * _.differenceBy([2.1, 1.2], [2.3, 3.4], Math.floor); + * // => [1.2] + * + * // The `_.property` iteratee shorthand. + * _.differenceBy([{ 'x': 2 }, { 'x': 1 }], [{ 'x': 1 }], 'x'); + * // => [{ 'x': 2 }] + */ + var differenceBy = baseRest(function(array, values) { + var iteratee = last(values); + if (isArrayLikeObject(iteratee)) { + iteratee = undefined; + } + return isArrayLikeObject(array) + ? baseDifference(array, baseFlatten(values, 1, isArrayLikeObject, true), getIteratee(iteratee, 2)) + : []; + }); + + /** + * This method is like `_.difference` except that it accepts `comparator` + * which is invoked to compare elements of `array` to `values`. The order and + * references of result values are determined by the first array. The comparator + * is invoked with two arguments: (arrVal, othVal). + * + * **Note:** Unlike `_.pullAllWith`, this method returns a new array. + * + * @static + * @memberOf _ + * @since 4.0.0 + * @category Array + * @param {Array} array The array to inspect. + * @param {...Array} [values] The values to exclude. + * @param {Function} [comparator] The comparator invoked per element. + * @returns {Array} Returns the new array of filtered values. + * @example + * + * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }]; + * + * _.differenceWith(objects, [{ 'x': 1, 'y': 2 }], _.isEqual); + * // => [{ 'x': 2, 'y': 1 }] + */ + var differenceWith = baseRest(function(array, values) { + var comparator = last(values); + if (isArrayLikeObject(comparator)) { + comparator = undefined; + } + return isArrayLikeObject(array) + ? baseDifference(array, baseFlatten(values, 1, isArrayLikeObject, true), undefined, comparator) + : []; + }); + + /** + * Creates a slice of `array` with `n` elements dropped from the beginning. + * + * @static + * @memberOf _ + * @since 0.5.0 + * @category Array + * @param {Array} array The array to query. + * @param {number} [n=1] The number of elements to drop. + * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`. + * @returns {Array} Returns the slice of `array`. + * @example + * + * _.drop([1, 2, 3]); + * // => [2, 3] + * + * _.drop([1, 2, 3], 2); + * // => [3] + * + * _.drop([1, 2, 3], 5); + * // => [] + * + * _.drop([1, 2, 3], 0); + * // => [1, 2, 3] + */ + function drop(array, n, guard) { + var length = array == null ? 0 : array.length; + if (!length) { + return []; + } + n = (guard || n === undefined) ? 1 : toInteger(n); + return baseSlice(array, n < 0 ? 0 : n, length); + } + + /** + * Creates a slice of `array` with `n` elements dropped from the end. + * + * @static + * @memberOf _ + * @since 3.0.0 + * @category Array + * @param {Array} array The array to query. + * @param {number} [n=1] The number of elements to drop. + * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`. + * @returns {Array} Returns the slice of `array`. + * @example + * + * _.dropRight([1, 2, 3]); + * // => [1, 2] + * + * _.dropRight([1, 2, 3], 2); + * // => [1] + * + * _.dropRight([1, 2, 3], 5); + * // => [] + * + * _.dropRight([1, 2, 3], 0); + * // => [1, 2, 3] + */ + function dropRight(array, n, guard) { + var length = array == null ? 0 : array.length; + if (!length) { + return []; + } + n = (guard || n === undefined) ? 1 : toInteger(n); + n = length - n; + return baseSlice(array, 0, n < 0 ? 0 : n); + } + + /** + * Creates a slice of `array` excluding elements dropped from the end. + * Elements are dropped until `predicate` returns falsey. The predicate is + * invoked with three arguments: (value, index, array). + * + * @static + * @memberOf _ + * @since 3.0.0 + * @category Array + * @param {Array} array The array to query. + * @param {Function} [predicate=_.identity] The function invoked per iteration. + * @returns {Array} Returns the slice of `array`. + * @example + * + * var users = [ + * { 'user': 'barney', 'active': true }, + * { 'user': 'fred', 'active': false }, + * { 'user': 'pebbles', 'active': false } + * ]; + * + * _.dropRightWhile(users, function(o) { return !o.active; }); + * // => objects for ['barney'] + * + * // The `_.matches` iteratee shorthand. + * _.dropRightWhile(users, { 'user': 'pebbles', 'active': false }); + * // => objects for ['barney', 'fred'] + * + * // The `_.matchesProperty` iteratee shorthand. + * _.dropRightWhile(users, ['active', false]); + * // => objects for ['barney'] + * + * // The `_.property` iteratee shorthand. + * _.dropRightWhile(users, 'active'); + * // => objects for ['barney', 'fred', 'pebbles'] + */ + function dropRightWhile(array, predicate) { + return (array && array.length) + ? baseWhile(array, getIteratee(predicate, 3), true, true) + : []; + } + + /** + * Creates a slice of `array` excluding elements dropped from the beginning. + * Elements are dropped until `predicate` returns falsey. The predicate is + * invoked with three arguments: (value, index, array). + * + * @static + * @memberOf _ + * @since 3.0.0 + * @category Array + * @param {Array} array The array to query. + * @param {Function} [predicate=_.identity] The function invoked per iteration. + * @returns {Array} Returns the slice of `array`. + * @example + * + * var users = [ + * { 'user': 'barney', 'active': false }, + * { 'user': 'fred', 'active': false }, + * { 'user': 'pebbles', 'active': true } + * ]; + * + * _.dropWhile(users, function(o) { return !o.active; }); + * // => objects for ['pebbles'] + * + * // The `_.matches` iteratee shorthand. + * _.dropWhile(users, { 'user': 'barney', 'active': false }); + * // => objects for ['fred', 'pebbles'] + * + * // The `_.matchesProperty` iteratee shorthand. + * _.dropWhile(users, ['active', false]); + * // => objects for ['pebbles'] + * + * // The `_.property` iteratee shorthand. + * _.dropWhile(users, 'active'); + * // => objects for ['barney', 'fred', 'pebbles'] + */ + function dropWhile(array, predicate) { + return (array && array.length) + ? baseWhile(array, getIteratee(predicate, 3), true) + : []; + } + + /** + * Fills elements of `array` with `value` from `start` up to, but not + * including, `end`. + * + * **Note:** This method mutates `array`. + * + * @static + * @memberOf _ + * @since 3.2.0 + * @category Array + * @param {Array} array The array to fill. + * @param {*} value The value to fill `array` with. + * @param {number} [start=0] The start position. + * @param {number} [end=array.length] The end position. + * @returns {Array} Returns `array`. + * @example + * + * var array = [1, 2, 3]; + * + * _.fill(array, 'a'); + * console.log(array); + * // => ['a', 'a', 'a'] + * + * _.fill(Array(3), 2); + * // => [2, 2, 2] + * + * _.fill([4, 6, 8, 10], '*', 1, 3); + * // => [4, '*', '*', 10] + */ + function fill(array, value, start, end) { + var length = array == null ? 0 : array.length; + if (!length) { + return []; + } + if (start && typeof start != 'number' && isIterateeCall(array, value, start)) { + start = 0; + end = length; + } + return baseFill(array, value, start, end); + } + + /** + * This method is like `_.find` except that it returns the index of the first + * element `predicate` returns truthy for instead of the element itself. + * + * @static + * @memberOf _ + * @since 1.1.0 + * @category Array + * @param {Array} array The array to inspect. + * @param {Function} [predicate=_.identity] The function invoked per iteration. + * @param {number} [fromIndex=0] The index to search from. + * @returns {number} Returns the index of the found element, else `-1`. + * @example + * + * var users = [ + * { 'user': 'barney', 'active': false }, + * { 'user': 'fred', 'active': false }, + * { 'user': 'pebbles', 'active': true } + * ]; + * + * _.findIndex(users, function(o) { return o.user == 'barney'; }); + * // => 0 + * + * // The `_.matches` iteratee shorthand. + * _.findIndex(users, { 'user': 'fred', 'active': false }); + * // => 1 + * + * // The `_.matchesProperty` iteratee shorthand. + * _.findIndex(users, ['active', false]); + * // => 0 + * + * // The `_.property` iteratee shorthand. + * _.findIndex(users, 'active'); + * // => 2 + */ + function findIndex(array, predicate, fromIndex) { + var length = array == null ? 0 : array.length; + if (!length) { + return -1; + } + var index = fromIndex == null ? 0 : toInteger(fromIndex); + if (index < 0) { + index = nativeMax(length + index, 0); + } + return baseFindIndex(array, getIteratee(predicate, 3), index); + } + + /** + * This method is like `_.findIndex` except that it iterates over elements + * of `collection` from right to left. + * + * @static + * @memberOf _ + * @since 2.0.0 + * @category Array + * @param {Array} array The array to inspect. + * @param {Function} [predicate=_.identity] The function invoked per iteration. + * @param {number} [fromIndex=array.length-1] The index to search from. + * @returns {number} Returns the index of the found element, else `-1`. + * @example + * + * var users = [ + * { 'user': 'barney', 'active': true }, + * { 'user': 'fred', 'active': false }, + * { 'user': 'pebbles', 'active': false } + * ]; + * + * _.findLastIndex(users, function(o) { return o.user == 'pebbles'; }); + * // => 2 + * + * // The `_.matches` iteratee shorthand. + * _.findLastIndex(users, { 'user': 'barney', 'active': true }); + * // => 0 + * + * // The `_.matchesProperty` iteratee shorthand. + * _.findLastIndex(users, ['active', false]); + * // => 2 + * + * // The `_.property` iteratee shorthand. + * _.findLastIndex(users, 'active'); + * // => 0 + */ + function findLastIndex(array, predicate, fromIndex) { + var length = array == null ? 0 : array.length; + if (!length) { + return -1; + } + var index = length - 1; + if (fromIndex !== undefined) { + index = toInteger(fromIndex); + index = fromIndex < 0 + ? nativeMax(length + index, 0) + : nativeMin(index, length - 1); + } + return baseFindIndex(array, getIteratee(predicate, 3), index, true); + } + + /** + * Flattens `array` a single level deep. + * + * @static + * @memberOf _ + * @since 0.1.0 + * @category Array + * @param {Array} array The array to flatten. + * @returns {Array} Returns the new flattened array. + * @example + * + * _.flatten([1, [2, [3, [4]], 5]]); + * // => [1, 2, [3, [4]], 5] + */ + function flatten(array) { + var length = array == null ? 0 : array.length; + return length ? baseFlatten(array, 1) : []; + } + + /** + * Recursively flattens `array`. + * + * @static + * @memberOf _ + * @since 3.0.0 + * @category Array + * @param {Array} array The array to flatten. + * @returns {Array} Returns the new flattened array. + * @example + * + * _.flattenDeep([1, [2, [3, [4]], 5]]); + * // => [1, 2, 3, 4, 5] + */ + function flattenDeep(array) { + var length = array == null ? 0 : array.length; + return length ? baseFlatten(array, INFINITY) : []; + } + + /** + * Recursively flatten `array` up to `depth` times. + * + * @static + * @memberOf _ + * @since 4.4.0 + * @category Array + * @param {Array} array The array to flatten. + * @param {number} [depth=1] The maximum recursion depth. + * @returns {Array} Returns the new flattened array. + * @example + * + * var array = [1, [2, [3, [4]], 5]]; + * + * _.flattenDepth(array, 1); + * // => [1, 2, [3, [4]], 5] + * + * _.flattenDepth(array, 2); + * // => [1, 2, 3, [4], 5] + */ + function flattenDepth(array, depth) { + var length = array == null ? 0 : array.length; + if (!length) { + return []; + } + depth = depth === undefined ? 1 : toInteger(depth); + return baseFlatten(array, depth); + } + + /** + * The inverse of `_.toPairs`; this method returns an object composed + * from key-value `pairs`. + * + * @static + * @memberOf _ + * @since 4.0.0 + * @category Array + * @param {Array} pairs The key-value pairs. + * @returns {Object} Returns the new object. + * @example + * + * _.fromPairs([['a', 1], ['b', 2]]); + * // => { 'a': 1, 'b': 2 } + */ + function fromPairs(pairs) { + var index = -1, + length = pairs == null ? 0 : pairs.length, + result = {}; + + while (++index < length) { + var pair = pairs[index]; + result[pair[0]] = pair[1]; + } + return result; + } + + /** + * Gets the first element of `array`. + * + * @static + * @memberOf _ + * @since 0.1.0 + * @alias first + * @category Array + * @param {Array} array The array to query. + * @returns {*} Returns the first element of `array`. + * @example + * + * _.head([1, 2, 3]); + * // => 1 + * + * _.head([]); + * // => undefined + */ + function head(array) { + return (array && array.length) ? array[0] : undefined; + } + + /** + * Gets the index at which the first occurrence of `value` is found in `array` + * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero) + * for equality comparisons. If `fromIndex` is negative, it's used as the + * offset from the end of `array`. + * + * @static + * @memberOf _ + * @since 0.1.0 + * @category Array + * @param {Array} array The array to inspect. + * @param {*} value The value to search for. + * @param {number} [fromIndex=0] The index to search from. + * @returns {number} Returns the index of the matched value, else `-1`. + * @example + * + * _.indexOf([1, 2, 1, 2], 2); + * // => 1 + * + * // Search from the `fromIndex`. + * _.indexOf([1, 2, 1, 2], 2, 2); + * // => 3 + */ + function indexOf(array, value, fromIndex) { + var length = array == null ? 0 : array.length; + if (!length) { + return -1; + } + var index = fromIndex == null ? 0 : toInteger(fromIndex); + if (index < 0) { + index = nativeMax(length + index, 0); + } + return baseIndexOf(array, value, index); + } + + /** + * Gets all but the last element of `array`. + * + * @static + * @memberOf _ + * @since 0.1.0 + * @category Array + * @param {Array} array The array to query. + * @returns {Array} Returns the slice of `array`. + * @example + * + * _.initial([1, 2, 3]); + * // => [1, 2] + */ + function initial(array) { + var length = array == null ? 0 : array.length; + return length ? baseSlice(array, 0, -1) : []; + } + + /** + * Creates an array of unique values that are included in all given arrays + * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero) + * for equality comparisons. The order and references of result values are + * determined by the first array. + * + * @static + * @memberOf _ + * @since 0.1.0 + * @category Array + * @param {...Array} [arrays] The arrays to inspect. + * @returns {Array} Returns the new array of intersecting values. + * @example + * + * _.intersection([2, 1], [2, 3]); + * // => [2] + */ + var intersection = baseRest(function(arrays) { + var mapped = arrayMap(arrays, castArrayLikeObject); + return (mapped.length && mapped[0] === arrays[0]) + ? baseIntersection(mapped) + : []; + }); + + /** + * This method is like `_.intersection` except that it accepts `iteratee` + * which is invoked for each element of each `arrays` to generate the criterion + * by which they're compared. The order and references of result values are + * determined by the first array. The iteratee is invoked with one argument: + * (value). + * + * @static + * @memberOf _ + * @since 4.0.0 + * @category Array + * @param {...Array} [arrays] The arrays to inspect. + * @param {Function} [iteratee=_.identity] The iteratee invoked per element. + * @returns {Array} Returns the new array of intersecting values. + * @example + * + * _.intersectionBy([2.1, 1.2], [2.3, 3.4], Math.floor); + * // => [2.1] + * + * // The `_.property` iteratee shorthand. + * _.intersectionBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x'); + * // => [{ 'x': 1 }] + */ + var intersectionBy = baseRest(function(arrays) { + var iteratee = last(arrays), + mapped = arrayMap(arrays, castArrayLikeObject); + + if (iteratee === last(mapped)) { + iteratee = undefined; + } else { + mapped.pop(); + } + return (mapped.length && mapped[0] === arrays[0]) + ? baseIntersection(mapped, getIteratee(iteratee, 2)) + : []; + }); + + /** + * This method is like `_.intersection` except that it accepts `comparator` + * which is invoked to compare elements of `arrays`. The order and references + * of result values are determined by the first array. The comparator is + * invoked with two arguments: (arrVal, othVal). + * + * @static + * @memberOf _ + * @since 4.0.0 + * @category Array + * @param {...Array} [arrays] The arrays to inspect. + * @param {Function} [comparator] The comparator invoked per element. + * @returns {Array} Returns the new array of intersecting values. + * @example + * + * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }]; + * var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }]; + * + * _.intersectionWith(objects, others, _.isEqual); + * // => [{ 'x': 1, 'y': 2 }] + */ + var intersectionWith = baseRest(function(arrays) { + var comparator = last(arrays), + mapped = arrayMap(arrays, castArrayLikeObject); + + comparator = typeof comparator == 'function' ? comparator : undefined; + if (comparator) { + mapped.pop(); + } + return (mapped.length && mapped[0] === arrays[0]) + ? baseIntersection(mapped, undefined, comparator) + : []; + }); + + /** + * Converts all elements in `array` into a string separated by `separator`. + * + * @static + * @memberOf _ + * @since 4.0.0 + * @category Array + * @param {Array} array The array to convert. + * @param {string} [separator=','] The element separator. + * @returns {string} Returns the joined string. + * @example + * + * _.join(['a', 'b', 'c'], '~'); + * // => 'a~b~c' + */ + function join(array, separator) { + return array == null ? '' : nativeJoin.call(array, separator); + } + + /** + * Gets the last element of `array`. + * + * @static + * @memberOf _ + * @since 0.1.0 + * @category Array + * @param {Array} array The array to query. + * @returns {*} Returns the last element of `array`. + * @example + * + * _.last([1, 2, 3]); + * // => 3 + */ + function last(array) { + var length = array == null ? 0 : array.length; + return length ? array[length - 1] : undefined; + } + + /** + * This method is like `_.indexOf` except that it iterates over elements of + * `array` from right to left. + * + * @static + * @memberOf _ + * @since 0.1.0 + * @category Array + * @param {Array} array The array to inspect. + * @param {*} value The value to search for. + * @param {number} [fromIndex=array.length-1] The index to search from. + * @returns {number} Returns the index of the matched value, else `-1`. + * @example + * + * _.lastIndexOf([1, 2, 1, 2], 2); + * // => 3 + * + * // Search from the `fromIndex`. + * _.lastIndexOf([1, 2, 1, 2], 2, 2); + * // => 1 + */ + function lastIndexOf(array, value, fromIndex) { + var length = array == null ? 0 : array.length; + if (!length) { + return -1; + } + var index = length; + if (fromIndex !== undefined) { + index = toInteger(fromIndex); + index = index < 0 ? nativeMax(length + index, 0) : nativeMin(index, length - 1); + } + return value === value + ? strictLastIndexOf(array, value, index) + : baseFindIndex(array, baseIsNaN, index, true); + } + + /** + * Gets the element at index `n` of `array`. If `n` is negative, the nth + * element from the end is returned. + * + * @static + * @memberOf _ + * @since 4.11.0 + * @category Array + * @param {Array} array The array to query. + * @param {number} [n=0] The index of the element to return. + * @returns {*} Returns the nth element of `array`. + * @example + * + * var array = ['a', 'b', 'c', 'd']; + * + * _.nth(array, 1); + * // => 'b' + * + * _.nth(array, -2); + * // => 'c'; + */ + function nth(array, n) { + return (array && array.length) ? baseNth(array, toInteger(n)) : undefined; + } + + /** + * Removes all given values from `array` using + * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero) + * for equality comparisons. + * + * **Note:** Unlike `_.without`, this method mutates `array`. Use `_.remove` + * to remove elements from an array by predicate. + * + * @static + * @memberOf _ + * @since 2.0.0 + * @category Array + * @param {Array} array The array to modify. + * @param {...*} [values] The values to remove. + * @returns {Array} Returns `array`. + * @example + * + * var array = ['a', 'b', 'c', 'a', 'b', 'c']; + * + * _.pull(array, 'a', 'c'); + * console.log(array); + * // => ['b', 'b'] + */ + var pull = baseRest(pullAll); + + /** + * This method is like `_.pull` except that it accepts an array of values to remove. + * + * **Note:** Unlike `_.difference`, this method mutates `array`. + * + * @static + * @memberOf _ + * @since 4.0.0 + * @category Array + * @param {Array} array The array to modify. + * @param {Array} values The values to remove. + * @returns {Array} Returns `array`. + * @example + * + * var array = ['a', 'b', 'c', 'a', 'b', 'c']; + * + * _.pullAll(array, ['a', 'c']); + * console.log(array); + * // => ['b', 'b'] + */ + function pullAll(array, values) { + return (array && array.length && values && values.length) + ? basePullAll(array, values) + : array; + } + + /** + * This method is like `_.pullAll` except that it accepts `iteratee` which is + * invoked for each element of `array` and `values` to generate the criterion + * by which they're compared. The iteratee is invoked with one argument: (value). + * + * **Note:** Unlike `_.differenceBy`, this method mutates `array`. + * + * @static + * @memberOf _ + * @since 4.0.0 + * @category Array + * @param {Array} array The array to modify. + * @param {Array} values The values to remove. + * @param {Function} [iteratee=_.identity] The iteratee invoked per element. + * @returns {Array} Returns `array`. + * @example + * + * var array = [{ 'x': 1 }, { 'x': 2 }, { 'x': 3 }, { 'x': 1 }]; + * + * _.pullAllBy(array, [{ 'x': 1 }, { 'x': 3 }], 'x'); + * console.log(array); + * // => [{ 'x': 2 }] + */ + function pullAllBy(array, values, iteratee) { + return (array && array.length && values && values.length) + ? basePullAll(array, values, getIteratee(iteratee, 2)) + : array; + } + + /** + * This method is like `_.pullAll` except that it accepts `comparator` which + * is invoked to compare elements of `array` to `values`. The comparator is + * invoked with two arguments: (arrVal, othVal). + * + * **Note:** Unlike `_.differenceWith`, this method mutates `array`. + * + * @static + * @memberOf _ + * @since 4.6.0 + * @category Array + * @param {Array} array The array to modify. + * @param {Array} values The values to remove. + * @param {Function} [comparator] The comparator invoked per element. + * @returns {Array} Returns `array`. + * @example + * + * var array = [{ 'x': 1, 'y': 2 }, { 'x': 3, 'y': 4 }, { 'x': 5, 'y': 6 }]; + * + * _.pullAllWith(array, [{ 'x': 3, 'y': 4 }], _.isEqual); + * console.log(array); + * // => [{ 'x': 1, 'y': 2 }, { 'x': 5, 'y': 6 }] + */ + function pullAllWith(array, values, comparator) { + return (array && array.length && values && values.length) + ? basePullAll(array, values, undefined, comparator) + : array; + } + + /** + * Removes elements from `array` corresponding to `indexes` and returns an + * array of removed elements. + * + * **Note:** Unlike `_.at`, this method mutates `array`. + * + * @static + * @memberOf _ + * @since 3.0.0 + * @category Array + * @param {Array} array The array to modify. + * @param {...(number|number[])} [indexes] The indexes of elements to remove. + * @returns {Array} Returns the new array of removed elements. + * @example + * + * var array = ['a', 'b', 'c', 'd']; + * var pulled = _.pullAt(array, [1, 3]); + * + * console.log(array); + * // => ['a', 'c'] + * + * console.log(pulled); + * // => ['b', 'd'] + */ + var pullAt = flatRest(function(array, indexes) { + var length = array == null ? 0 : array.length, + result = baseAt(array, indexes); + + basePullAt(array, arrayMap(indexes, function(index) { + return isIndex(index, length) ? +index : index; + }).sort(compareAscending)); + + return result; + }); + + /** + * Removes all elements from `array` that `predicate` returns truthy for + * and returns an array of the removed elements. The predicate is invoked + * with three arguments: (value, index, array). + * + * **Note:** Unlike `_.filter`, this method mutates `array`. Use `_.pull` + * to pull elements from an array by value. + * + * @static + * @memberOf _ + * @since 2.0.0 + * @category Array + * @param {Array} array The array to modify. + * @param {Function} [predicate=_.identity] The function invoked per iteration. + * @returns {Array} Returns the new array of removed elements. + * @example + * + * var array = [1, 2, 3, 4]; + * var evens = _.remove(array, function(n) { + * return n % 2 == 0; + * }); + * + * console.log(array); + * // => [1, 3] + * + * console.log(evens); + * // => [2, 4] + */ + function remove(array, predicate) { + var result = []; + if (!(array && array.length)) { + return result; + } + var index = -1, + indexes = [], + length = array.length; + + predicate = getIteratee(predicate, 3); + while (++index < length) { + var value = array[index]; + if (predicate(value, index, array)) { + result.push(value); + indexes.push(index); + } + } + basePullAt(array, indexes); + return result; + } + + /** + * Reverses `array` so that the first element becomes the last, the second + * element becomes the second to last, and so on. + * + * **Note:** This method mutates `array` and is based on + * [`Array#reverse`](https://mdn.io/Array/reverse). + * + * @static + * @memberOf _ + * @since 4.0.0 + * @category Array + * @param {Array} array The array to modify. + * @returns {Array} Returns `array`. + * @example + * + * var array = [1, 2, 3]; + * + * _.reverse(array); + * // => [3, 2, 1] + * + * console.log(array); + * // => [3, 2, 1] + */ + function reverse(array) { + return array == null ? array : nativeReverse.call(array); + } + + /** + * Creates a slice of `array` from `start` up to, but not including, `end`. + * + * **Note:** This method is used instead of + * [`Array#slice`](https://mdn.io/Array/slice) to ensure dense arrays are + * returned. + * + * @static + * @memberOf _ + * @since 3.0.0 + * @category Array + * @param {Array} array The array to slice. + * @param {number} [start=0] The start position. + * @param {number} [end=array.length] The end position. + * @returns {Array} Returns the slice of `array`. + */ + function slice(array, start, end) { + var length = array == null ? 0 : array.length; + if (!length) { + return []; + } + if (end && typeof end != 'number' && isIterateeCall(array, start, end)) { + start = 0; + end = length; + } + else { + start = start == null ? 0 : toInteger(start); + end = end === undefined ? length : toInteger(end); + } + return baseSlice(array, start, end); + } + + /** + * Uses a binary search to determine the lowest index at which `value` + * should be inserted into `array` in order to maintain its sort order. + * + * @static + * @memberOf _ + * @since 0.1.0 + * @category Array + * @param {Array} array The sorted array to inspect. + * @param {*} value The value to evaluate. + * @returns {number} Returns the index at which `value` should be inserted + * into `array`. + * @example + * + * _.sortedIndex([30, 50], 40); + * // => 1 + */ + function sortedIndex(array, value) { + return baseSortedIndex(array, value); + } + + /** + * This method is like `_.sortedIndex` except that it accepts `iteratee` + * which is invoked for `value` and each element of `array` to compute their + * sort ranking. The iteratee is invoked with one argument: (value). + * + * @static + * @memberOf _ + * @since 4.0.0 + * @category Array + * @param {Array} array The sorted array to inspect. + * @param {*} value The value to evaluate. + * @param {Function} [iteratee=_.identity] The iteratee invoked per element. + * @returns {number} Returns the index at which `value` should be inserted + * into `array`. + * @example + * + * var objects = [{ 'x': 4 }, { 'x': 5 }]; + * + * _.sortedIndexBy(objects, { 'x': 4 }, function(o) { return o.x; }); + * // => 0 + * + * // The `_.property` iteratee shorthand. + * _.sortedIndexBy(objects, { 'x': 4 }, 'x'); + * // => 0 + */ + function sortedIndexBy(array, value, iteratee) { + return baseSortedIndexBy(array, value, getIteratee(iteratee, 2)); + } + + /** + * This method is like `_.indexOf` except that it performs a binary + * search on a sorted `array`. + * + * @static + * @memberOf _ + * @since 4.0.0 + * @category Array + * @param {Array} array The array to inspect. + * @param {*} value The value to search for. + * @returns {number} Returns the index of the matched value, else `-1`. + * @example + * + * _.sortedIndexOf([4, 5, 5, 5, 6], 5); + * // => 1 + */ + function sortedIndexOf(array, value) { + var length = array == null ? 0 : array.length; + if (length) { + var index = baseSortedIndex(array, value); + if (index < length && eq(array[index], value)) { + return index; + } + } + return -1; + } + + /** + * This method is like `_.sortedIndex` except that it returns the highest + * index at which `value` should be inserted into `array` in order to + * maintain its sort order. + * + * @static + * @memberOf _ + * @since 3.0.0 + * @category Array + * @param {Array} array The sorted array to inspect. + * @param {*} value The value to evaluate. + * @returns {number} Returns the index at which `value` should be inserted + * into `array`. + * @example + * + * _.sortedLastIndex([4, 5, 5, 5, 6], 5); + * // => 4 + */ + function sortedLastIndex(array, value) { + return baseSortedIndex(array, value, true); + } + + /** + * This method is like `_.sortedLastIndex` except that it accepts `iteratee` + * which is invoked for `value` and each element of `array` to compute their + * sort ranking. The iteratee is invoked with one argument: (value). + * + * @static + * @memberOf _ + * @since 4.0.0 + * @category Array + * @param {Array} array The sorted array to inspect. + * @param {*} value The value to evaluate. + * @param {Function} [iteratee=_.identity] The iteratee invoked per element. + * @returns {number} Returns the index at which `value` should be inserted + * into `array`. + * @example + * + * var objects = [{ 'x': 4 }, { 'x': 5 }]; + * + * _.sortedLastIndexBy(objects, { 'x': 4 }, function(o) { return o.x; }); + * // => 1 + * + * // The `_.property` iteratee shorthand. + * _.sortedLastIndexBy(objects, { 'x': 4 }, 'x'); + * // => 1 + */ + function sortedLastIndexBy(array, value, iteratee) { + return baseSortedIndexBy(array, value, getIteratee(iteratee, 2), true); + } + + /** + * This method is like `_.lastIndexOf` except that it performs a binary + * search on a sorted `array`. + * + * @static + * @memberOf _ + * @since 4.0.0 + * @category Array + * @param {Array} array The array to inspect. + * @param {*} value The value to search for. + * @returns {number} Returns the index of the matched value, else `-1`. + * @example + * + * _.sortedLastIndexOf([4, 5, 5, 5, 6], 5); + * // => 3 + */ + function sortedLastIndexOf(array, value) { + var length = array == null ? 0 : array.length; + if (length) { + var index = baseSortedIndex(array, value, true) - 1; + if (eq(array[index], value)) { + return index; + } + } + return -1; + } + + /** + * This method is like `_.uniq` except that it's designed and optimized + * for sorted arrays. + * + * @static + * @memberOf _ + * @since 4.0.0 + * @category Array + * @param {Array} array The array to inspect. + * @returns {Array} Returns the new duplicate free array. + * @example + * + * _.sortedUniq([1, 1, 2]); + * // => [1, 2] + */ + function sortedUniq(array) { + return (array && array.length) + ? baseSortedUniq(array) + : []; + } + + /** + * This method is like `_.uniqBy` except that it's designed and optimized + * for sorted arrays. + * + * @static + * @memberOf _ + * @since 4.0.0 + * @category Array + * @param {Array} array The array to inspect. + * @param {Function} [iteratee] The iteratee invoked per element. + * @returns {Array} Returns the new duplicate free array. + * @example + * + * _.sortedUniqBy([1.1, 1.2, 2.3, 2.4], Math.floor); + * // => [1.1, 2.3] + */ + function sortedUniqBy(array, iteratee) { + return (array && array.length) + ? baseSortedUniq(array, getIteratee(iteratee, 2)) + : []; + } + + /** + * Gets all but the first element of `array`. + * + * @static + * @memberOf _ + * @since 4.0.0 + * @category Array + * @param {Array} array The array to query. + * @returns {Array} Returns the slice of `array`. + * @example + * + * _.tail([1, 2, 3]); + * // => [2, 3] + */ + function tail(array) { + var length = array == null ? 0 : array.length; + return length ? baseSlice(array, 1, length) : []; + } + + /** + * Creates a slice of `array` with `n` elements taken from the beginning. + * + * @static + * @memberOf _ + * @since 0.1.0 + * @category Array + * @param {Array} array The array to query. + * @param {number} [n=1] The number of elements to take. + * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`. + * @returns {Array} Returns the slice of `array`. + * @example + * + * _.take([1, 2, 3]); + * // => [1] + * + * _.take([1, 2, 3], 2); + * // => [1, 2] + * + * _.take([1, 2, 3], 5); + * // => [1, 2, 3] + * + * _.take([1, 2, 3], 0); + * // => [] + */ + function take(array, n, guard) { + if (!(array && array.length)) { + return []; + } + n = (guard || n === undefined) ? 1 : toInteger(n); + return baseSlice(array, 0, n < 0 ? 0 : n); + } + + /** + * Creates a slice of `array` with `n` elements taken from the end. + * + * @static + * @memberOf _ + * @since 3.0.0 + * @category Array + * @param {Array} array The array to query. + * @param {number} [n=1] The number of elements to take. + * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`. + * @returns {Array} Returns the slice of `array`. + * @example + * + * _.takeRight([1, 2, 3]); + * // => [3] + * + * _.takeRight([1, 2, 3], 2); + * // => [2, 3] + * + * _.takeRight([1, 2, 3], 5); + * // => [1, 2, 3] + * + * _.takeRight([1, 2, 3], 0); + * // => [] + */ + function takeRight(array, n, guard) { + var length = array == null ? 0 : array.length; + if (!length) { + return []; + } + n = (guard || n === undefined) ? 1 : toInteger(n); + n = length - n; + return baseSlice(array, n < 0 ? 0 : n, length); + } + + /** + * Creates a slice of `array` with elements taken from the end. Elements are + * taken until `predicate` returns falsey. The predicate is invoked with + * three arguments: (value, index, array). + * + * @static + * @memberOf _ + * @since 3.0.0 + * @category Array + * @param {Array} array The array to query. + * @param {Function} [predicate=_.identity] The function invoked per iteration. + * @returns {Array} Returns the slice of `array`. + * @example + * + * var users = [ + * { 'user': 'barney', 'active': true }, + * { 'user': 'fred', 'active': false }, + * { 'user': 'pebbles', 'active': false } + * ]; + * + * _.takeRightWhile(users, function(o) { return !o.active; }); + * // => objects for ['fred', 'pebbles'] + * + * // The `_.matches` iteratee shorthand. + * _.takeRightWhile(users, { 'user': 'pebbles', 'active': false }); + * // => objects for ['pebbles'] + * + * // The `_.matchesProperty` iteratee shorthand. + * _.takeRightWhile(users, ['active', false]); + * // => objects for ['fred', 'pebbles'] + * + * // The `_.property` iteratee shorthand. + * _.takeRightWhile(users, 'active'); + * // => [] + */ + function takeRightWhile(array, predicate) { + return (array && array.length) + ? baseWhile(array, getIteratee(predicate, 3), false, true) + : []; + } + + /** + * Creates a slice of `array` with elements taken from the beginning. Elements + * are taken until `predicate` returns falsey. The predicate is invoked with + * three arguments: (value, index, array). + * + * @static + * @memberOf _ + * @since 3.0.0 + * @category Array + * @param {Array} array The array to query. + * @param {Function} [predicate=_.identity] The function invoked per iteration. + * @returns {Array} Returns the slice of `array`. + * @example + * + * var users = [ + * { 'user': 'barney', 'active': false }, + * { 'user': 'fred', 'active': false }, + * { 'user': 'pebbles', 'active': true } + * ]; + * + * _.takeWhile(users, function(o) { return !o.active; }); + * // => objects for ['barney', 'fred'] + * + * // The `_.matches` iteratee shorthand. + * _.takeWhile(users, { 'user': 'barney', 'active': false }); + * // => objects for ['barney'] + * + * // The `_.matchesProperty` iteratee shorthand. + * _.takeWhile(users, ['active', false]); + * // => objects for ['barney', 'fred'] + * + * // The `_.property` iteratee shorthand. + * _.takeWhile(users, 'active'); + * // => [] + */ + function takeWhile(array, predicate) { + return (array && array.length) + ? baseWhile(array, getIteratee(predicate, 3)) + : []; + } + + /** + * Creates an array of unique values, in order, from all given arrays using + * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero) + * for equality comparisons. + * + * @static + * @memberOf _ + * @since 0.1.0 + * @category Array + * @param {...Array} [arrays] The arrays to inspect. + * @returns {Array} Returns the new array of combined values. + * @example + * + * _.union([2], [1, 2]); + * // => [2, 1] + */ + var union = baseRest(function(arrays) { + return baseUniq(baseFlatten(arrays, 1, isArrayLikeObject, true)); + }); + + /** + * This method is like `_.union` except that it accepts `iteratee` which is + * invoked for each element of each `arrays` to generate the criterion by + * which uniqueness is computed. Result values are chosen from the first + * array in which the value occurs. The iteratee is invoked with one argument: + * (value). + * + * @static + * @memberOf _ + * @since 4.0.0 + * @category Array + * @param {...Array} [arrays] The arrays to inspect. + * @param {Function} [iteratee=_.identity] The iteratee invoked per element. + * @returns {Array} Returns the new array of combined values. + * @example + * + * _.unionBy([2.1], [1.2, 2.3], Math.floor); + * // => [2.1, 1.2] + * + * // The `_.property` iteratee shorthand. + * _.unionBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x'); + * // => [{ 'x': 1 }, { 'x': 2 }] + */ + var unionBy = baseRest(function(arrays) { + var iteratee = last(arrays); + if (isArrayLikeObject(iteratee)) { + iteratee = undefined; + } + return baseUniq(baseFlatten(arrays, 1, isArrayLikeObject, true), getIteratee(iteratee, 2)); + }); + + /** + * This method is like `_.union` except that it accepts `comparator` which + * is invoked to compare elements of `arrays`. Result values are chosen from + * the first array in which the value occurs. The comparator is invoked + * with two arguments: (arrVal, othVal). + * + * @static + * @memberOf _ + * @since 4.0.0 + * @category Array + * @param {...Array} [arrays] The arrays to inspect. + * @param {Function} [comparator] The comparator invoked per element. + * @returns {Array} Returns the new array of combined values. + * @example + * + * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }]; + * var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }]; + * + * _.unionWith(objects, others, _.isEqual); + * // => [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }, { 'x': 1, 'y': 1 }] + */ + var unionWith = baseRest(function(arrays) { + var comparator = last(arrays); + comparator = typeof comparator == 'function' ? comparator : undefined; + return baseUniq(baseFlatten(arrays, 1, isArrayLikeObject, true), undefined, comparator); + }); + + /** + * Creates a duplicate-free version of an array, using + * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero) + * for equality comparisons, in which only the first occurrence of each element + * is kept. The order of result values is determined by the order they occur + * in the array. + * + * @static + * @memberOf _ + * @since 0.1.0 + * @category Array + * @param {Array} array The array to inspect. + * @returns {Array} Returns the new duplicate free array. + * @example + * + * _.uniq([2, 1, 2]); + * // => [2, 1] + */ + function uniq(array) { + return (array && array.length) ? baseUniq(array) : []; + } + + /** + * This method is like `_.uniq` except that it accepts `iteratee` which is + * invoked for each element in `array` to generate the criterion by which + * uniqueness is computed. The order of result values is determined by the + * order they occur in the array. The iteratee is invoked with one argument: + * (value). + * + * @static + * @memberOf _ + * @since 4.0.0 + * @category Array + * @param {Array} array The array to inspect. + * @param {Function} [iteratee=_.identity] The iteratee invoked per element. + * @returns {Array} Returns the new duplicate free array. + * @example + * + * _.uniqBy([2.1, 1.2, 2.3], Math.floor); + * // => [2.1, 1.2] + * + * // The `_.property` iteratee shorthand. + * _.uniqBy([{ 'x': 1 }, { 'x': 2 }, { 'x': 1 }], 'x'); + * // => [{ 'x': 1 }, { 'x': 2 }] + */ + function uniqBy(array, iteratee) { + return (array && array.length) ? baseUniq(array, getIteratee(iteratee, 2)) : []; + } + + /** + * This method is like `_.uniq` except that it accepts `comparator` which + * is invoked to compare elements of `array`. The order of result values is + * determined by the order they occur in the array.The comparator is invoked + * with two arguments: (arrVal, othVal). + * + * @static + * @memberOf _ + * @since 4.0.0 + * @category Array + * @param {Array} array The array to inspect. + * @param {Function} [comparator] The comparator invoked per element. + * @returns {Array} Returns the new duplicate free array. + * @example + * + * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }, { 'x': 1, 'y': 2 }]; + * + * _.uniqWith(objects, _.isEqual); + * // => [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }] + */ + function uniqWith(array, comparator) { + comparator = typeof comparator == 'function' ? comparator : undefined; + return (array && array.length) ? baseUniq(array, undefined, comparator) : []; + } + + /** + * This method is like `_.zip` except that it accepts an array of grouped + * elements and creates an array regrouping the elements to their pre-zip + * configuration. + * + * @static + * @memberOf _ + * @since 1.2.0 + * @category Array + * @param {Array} array The array of grouped elements to process. + * @returns {Array} Returns the new array of regrouped elements. + * @example + * + * var zipped = _.zip(['a', 'b'], [1, 2], [true, false]); + * // => [['a', 1, true], ['b', 2, false]] + * + * _.unzip(zipped); + * // => [['a', 'b'], [1, 2], [true, false]] + */ + function unzip(array) { + if (!(array && array.length)) { + return []; + } + var length = 0; + array = arrayFilter(array, function(group) { + if (isArrayLikeObject(group)) { + length = nativeMax(group.length, length); + return true; + } + }); + return baseTimes(length, function(index) { + return arrayMap(array, baseProperty(index)); + }); + } + + /** + * This method is like `_.unzip` except that it accepts `iteratee` to specify + * how regrouped values should be combined. The iteratee is invoked with the + * elements of each group: (...group). + * + * @static + * @memberOf _ + * @since 3.8.0 + * @category Array + * @param {Array} array The array of grouped elements to process. + * @param {Function} [iteratee=_.identity] The function to combine + * regrouped values. + * @returns {Array} Returns the new array of regrouped elements. + * @example + * + * var zipped = _.zip([1, 2], [10, 20], [100, 200]); + * // => [[1, 10, 100], [2, 20, 200]] + * + * _.unzipWith(zipped, _.add); + * // => [3, 30, 300] + */ + function unzipWith(array, iteratee) { + if (!(array && array.length)) { + return []; + } + var result = unzip(array); + if (iteratee == null) { + return result; + } + return arrayMap(result, function(group) { + return apply(iteratee, undefined, group); + }); + } + + /** + * Creates an array excluding all given values using + * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero) + * for equality comparisons. + * + * **Note:** Unlike `_.pull`, this method returns a new array. + * + * @static + * @memberOf _ + * @since 0.1.0 + * @category Array + * @param {Array} array The array to inspect. + * @param {...*} [values] The values to exclude. + * @returns {Array} Returns the new array of filtered values. + * @see _.difference, _.xor + * @example + * + * _.without([2, 1, 2, 3], 1, 2); + * // => [3] + */ + var without = baseRest(function(array, values) { + return isArrayLikeObject(array) + ? baseDifference(array, values) + : []; + }); + + /** + * Creates an array of unique values that is the + * [symmetric difference](https://en.wikipedia.org/wiki/Symmetric_difference) + * of the given arrays. The order of result values is determined by the order + * they occur in the arrays. + * + * @static + * @memberOf _ + * @since 2.4.0 + * @category Array + * @param {...Array} [arrays] The arrays to inspect. + * @returns {Array} Returns the new array of filtered values. + * @see _.difference, _.without + * @example + * + * _.xor([2, 1], [2, 3]); + * // => [1, 3] + */ + var xor = baseRest(function(arrays) { + return baseXor(arrayFilter(arrays, isArrayLikeObject)); + }); + + /** + * This method is like `_.xor` except that it accepts `iteratee` which is + * invoked for each element of each `arrays` to generate the criterion by + * which by which they're compared. The order of result values is determined + * by the order they occur in the arrays. The iteratee is invoked with one + * argument: (value). + * + * @static + * @memberOf _ + * @since 4.0.0 + * @category Array + * @param {...Array} [arrays] The arrays to inspect. + * @param {Function} [iteratee=_.identity] The iteratee invoked per element. + * @returns {Array} Returns the new array of filtered values. + * @example + * + * _.xorBy([2.1, 1.2], [2.3, 3.4], Math.floor); + * // => [1.2, 3.4] + * + * // The `_.property` iteratee shorthand. + * _.xorBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x'); + * // => [{ 'x': 2 }] + */ + var xorBy = baseRest(function(arrays) { + var iteratee = last(arrays); + if (isArrayLikeObject(iteratee)) { + iteratee = undefined; + } + return baseXor(arrayFilter(arrays, isArrayLikeObject), getIteratee(iteratee, 2)); + }); + + /** + * This method is like `_.xor` except that it accepts `comparator` which is + * invoked to compare elements of `arrays`. The order of result values is + * determined by the order they occur in the arrays. The comparator is invoked + * with two arguments: (arrVal, othVal). + * + * @static + * @memberOf _ + * @since 4.0.0 + * @category Array + * @param {...Array} [arrays] The arrays to inspect. + * @param {Function} [comparator] The comparator invoked per element. + * @returns {Array} Returns the new array of filtered values. + * @example + * + * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }]; + * var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }]; + * + * _.xorWith(objects, others, _.isEqual); + * // => [{ 'x': 2, 'y': 1 }, { 'x': 1, 'y': 1 }] + */ + var xorWith = baseRest(function(arrays) { + var comparator = last(arrays); + comparator = typeof comparator == 'function' ? comparator : undefined; + return baseXor(arrayFilter(arrays, isArrayLikeObject), undefined, comparator); + }); + + /** + * Creates an array of grouped elements, the first of which contains the + * first elements of the given arrays, the second of which contains the + * second elements of the given arrays, and so on. + * + * @static + * @memberOf _ + * @since 0.1.0 + * @category Array + * @param {...Array} [arrays] The arrays to process. + * @returns {Array} Returns the new array of grouped elements. + * @example + * + * _.zip(['a', 'b'], [1, 2], [true, false]); + * // => [['a', 1, true], ['b', 2, false]] + */ + var zip = baseRest(unzip); + + /** + * This method is like `_.fromPairs` except that it accepts two arrays, + * one of property identifiers and one of corresponding values. + * + * @static + * @memberOf _ + * @since 0.4.0 + * @category Array + * @param {Array} [props=[]] The property identifiers. + * @param {Array} [values=[]] The property values. + * @returns {Object} Returns the new object. + * @example + * + * _.zipObject(['a', 'b'], [1, 2]); + * // => { 'a': 1, 'b': 2 } + */ + function zipObject(props, values) { + return baseZipObject(props || [], values || [], assignValue); + } + + /** + * This method is like `_.zipObject` except that it supports property paths. + * + * @static + * @memberOf _ + * @since 4.1.0 + * @category Array + * @param {Array} [props=[]] The property identifiers. + * @param {Array} [values=[]] The property values. + * @returns {Object} Returns the new object. + * @example + * + * _.zipObjectDeep(['a.b[0].c', 'a.b[1].d'], [1, 2]); + * // => { 'a': { 'b': [{ 'c': 1 }, { 'd': 2 }] } } + */ + function zipObjectDeep(props, values) { + return baseZipObject(props || [], values || [], baseSet); + } + + /** + * This method is like `_.zip` except that it accepts `iteratee` to specify + * how grouped values should be combined. The iteratee is invoked with the + * elements of each group: (...group). + * + * @static + * @memberOf _ + * @since 3.8.0 + * @category Array + * @param {...Array} [arrays] The arrays to process. + * @param {Function} [iteratee=_.identity] The function to combine + * grouped values. + * @returns {Array} Returns the new array of grouped elements. + * @example + * + * _.zipWith([1, 2], [10, 20], [100, 200], function(a, b, c) { + * return a + b + c; + * }); + * // => [111, 222] + */ + var zipWith = baseRest(function(arrays) { + var length = arrays.length, + iteratee = length > 1 ? arrays[length - 1] : undefined; + + iteratee = typeof iteratee == 'function' ? (arrays.pop(), iteratee) : undefined; + return unzipWith(arrays, iteratee); + }); + + /*------------------------------------------------------------------------*/ + + /** + * Creates a `lodash` wrapper instance that wraps `value` with explicit method + * chain sequences enabled. The result of such sequences must be unwrapped + * with `_#value`. + * + * @static + * @memberOf _ + * @since 1.3.0 + * @category Seq + * @param {*} value The value to wrap. + * @returns {Object} Returns the new `lodash` wrapper instance. + * @example + * + * var users = [ + * { 'user': 'barney', 'age': 36 }, + * { 'user': 'fred', 'age': 40 }, + * { 'user': 'pebbles', 'age': 1 } + * ]; + * + * var youngest = _ + * .chain(users) + * .sortBy('age') + * .map(function(o) { + * return o.user + ' is ' + o.age; + * }) + * .head() + * .value(); + * // => 'pebbles is 1' + */ + function chain(value) { + var result = lodash(value); + result.__chain__ = true; + return result; + } + + /** + * This method invokes `interceptor` and returns `value`. The interceptor + * is invoked with one argument; (value). The purpose of this method is to + * "tap into" a method chain sequence in order to modify intermediate results. + * + * @static + * @memberOf _ + * @since 0.1.0 + * @category Seq + * @param {*} value The value to provide to `interceptor`. + * @param {Function} interceptor The function to invoke. + * @returns {*} Returns `value`. + * @example + * + * _([1, 2, 3]) + * .tap(function(array) { + * // Mutate input array. + * array.pop(); + * }) + * .reverse() + * .value(); + * // => [2, 1] + */ + function tap(value, interceptor) { + interceptor(value); + return value; + } + + /** + * This method is like `_.tap` except that it returns the result of `interceptor`. + * The purpose of this method is to "pass thru" values replacing intermediate + * results in a method chain sequence. + * + * @static + * @memberOf _ + * @since 3.0.0 + * @category Seq + * @param {*} value The value to provide to `interceptor`. + * @param {Function} interceptor The function to invoke. + * @returns {*} Returns the result of `interceptor`. + * @example + * + * _(' abc ') + * .chain() + * .trim() + * .thru(function(value) { + * return [value]; + * }) + * .value(); + * // => ['abc'] + */ + function thru(value, interceptor) { + return interceptor(value); + } + + /** + * This method is the wrapper version of `_.at`. + * + * @name at + * @memberOf _ + * @since 1.0.0 + * @category Seq + * @param {...(string|string[])} [paths] The property paths to pick. + * @returns {Object} Returns the new `lodash` wrapper instance. + * @example + * + * var object = { 'a': [{ 'b': { 'c': 3 } }, 4] }; + * + * _(object).at(['a[0].b.c', 'a[1]']).value(); + * // => [3, 4] + */ + var wrapperAt = flatRest(function(paths) { + var length = paths.length, + start = length ? paths[0] : 0, + value = this.__wrapped__, + interceptor = function(object) { return baseAt(object, paths); }; + + if (length > 1 || this.__actions__.length || + !(value instanceof LazyWrapper) || !isIndex(start)) { + return this.thru(interceptor); + } + value = value.slice(start, +start + (length ? 1 : 0)); + value.__actions__.push({ + 'func': thru, + 'args': [interceptor], + 'thisArg': undefined + }); + return new LodashWrapper(value, this.__chain__).thru(function(array) { + if (length && !array.length) { + array.push(undefined); + } + return array; + }); + }); + + /** + * Creates a `lodash` wrapper instance with explicit method chain sequences enabled. + * + * @name chain + * @memberOf _ + * @since 0.1.0 + * @category Seq + * @returns {Object} Returns the new `lodash` wrapper instance. + * @example + * + * var users = [ + * { 'user': 'barney', 'age': 36 }, + * { 'user': 'fred', 'age': 40 } + * ]; + * + * // A sequence without explicit chaining. + * _(users).head(); + * // => { 'user': 'barney', 'age': 36 } + * + * // A sequence with explicit chaining. + * _(users) + * .chain() + * .head() + * .pick('user') + * .value(); + * // => { 'user': 'barney' } + */ + function wrapperChain() { + return chain(this); + } + + /** + * Executes the chain sequence and returns the wrapped result. + * + * @name commit + * @memberOf _ + * @since 3.2.0 + * @category Seq + * @returns {Object} Returns the new `lodash` wrapper instance. + * @example + * + * var array = [1, 2]; + * var wrapped = _(array).push(3); + * + * console.log(array); + * // => [1, 2] + * + * wrapped = wrapped.commit(); + * console.log(array); + * // => [1, 2, 3] + * + * wrapped.last(); + * // => 3 + * + * console.log(array); + * // => [1, 2, 3] + */ + function wrapperCommit() { + return new LodashWrapper(this.value(), this.__chain__); + } + + /** + * Gets the next value on a wrapped object following the + * [iterator protocol](https://mdn.io/iteration_protocols#iterator). + * + * @name next + * @memberOf _ + * @since 4.0.0 + * @category Seq + * @returns {Object} Returns the next iterator value. + * @example + * + * var wrapped = _([1, 2]); + * + * wrapped.next(); + * // => { 'done': false, 'value': 1 } + * + * wrapped.next(); + * // => { 'done': false, 'value': 2 } + * + * wrapped.next(); + * // => { 'done': true, 'value': undefined } + */ + function wrapperNext() { + if (this.__values__ === undefined) { + this.__values__ = toArray(this.value()); + } + var done = this.__index__ >= this.__values__.length, + value = done ? undefined : this.__values__[this.__index__++]; + + return { 'done': done, 'value': value }; + } + + /** + * Enables the wrapper to be iterable. + * + * @name Symbol.iterator + * @memberOf _ + * @since 4.0.0 + * @category Seq + * @returns {Object} Returns the wrapper object. + * @example + * + * var wrapped = _([1, 2]); + * + * wrapped[Symbol.iterator]() === wrapped; + * // => true + * + * Array.from(wrapped); + * // => [1, 2] + */ + function wrapperToIterator() { + return this; + } + + /** + * Creates a clone of the chain sequence planting `value` as the wrapped value. + * + * @name plant + * @memberOf _ + * @since 3.2.0 + * @category Seq + * @param {*} value The value to plant. + * @returns {Object} Returns the new `lodash` wrapper instance. + * @example + * + * function square(n) { + * return n * n; + * } + * + * var wrapped = _([1, 2]).map(square); + * var other = wrapped.plant([3, 4]); + * + * other.value(); + * // => [9, 16] + * + * wrapped.value(); + * // => [1, 4] + */ + function wrapperPlant(value) { + var result, + parent = this; + + while (parent instanceof baseLodash) { + var clone = wrapperClone(parent); + clone.__index__ = 0; + clone.__values__ = undefined; + if (result) { + previous.__wrapped__ = clone; + } else { + result = clone; + } + var previous = clone; + parent = parent.__wrapped__; + } + previous.__wrapped__ = value; + return result; + } + + /** + * This method is the wrapper version of `_.reverse`. + * + * **Note:** This method mutates the wrapped array. + * + * @name reverse + * @memberOf _ + * @since 0.1.0 + * @category Seq + * @returns {Object} Returns the new `lodash` wrapper instance. + * @example + * + * var array = [1, 2, 3]; + * + * _(array).reverse().value() + * // => [3, 2, 1] + * + * console.log(array); + * // => [3, 2, 1] + */ + function wrapperReverse() { + var value = this.__wrapped__; + if (value instanceof LazyWrapper) { + var wrapped = value; + if (this.__actions__.length) { + wrapped = new LazyWrapper(this); + } + wrapped = wrapped.reverse(); + wrapped.__actions__.push({ + 'func': thru, + 'args': [reverse], + 'thisArg': undefined + }); + return new LodashWrapper(wrapped, this.__chain__); + } + return this.thru(reverse); + } + + /** + * Executes the chain sequence to resolve the unwrapped value. + * + * @name value + * @memberOf _ + * @since 0.1.0 + * @alias toJSON, valueOf + * @category Seq + * @returns {*} Returns the resolved unwrapped value. + * @example + * + * _([1, 2, 3]).value(); + * // => [1, 2, 3] + */ + function wrapperValue() { + return baseWrapperValue(this.__wrapped__, this.__actions__); + } + + /*------------------------------------------------------------------------*/ + + /** + * Creates an object composed of keys generated from the results of running + * each element of `collection` thru `iteratee`. The corresponding value of + * each key is the number of times the key was returned by `iteratee`. The + * iteratee is invoked with one argument: (value). + * + * @static + * @memberOf _ + * @since 0.5.0 + * @category Collection + * @param {Array|Object} collection The collection to iterate over. + * @param {Function} [iteratee=_.identity] The iteratee to transform keys. + * @returns {Object} Returns the composed aggregate object. + * @example + * + * _.countBy([6.1, 4.2, 6.3], Math.floor); + * // => { '4': 1, '6': 2 } + * + * // The `_.property` iteratee shorthand. + * _.countBy(['one', 'two', 'three'], 'length'); + * // => { '3': 2, '5': 1 } + */ + var countBy = createAggregator(function(result, value, key) { + if (hasOwnProperty.call(result, key)) { + ++result[key]; + } else { + baseAssignValue(result, key, 1); + } + }); + + /** + * Checks if `predicate` returns truthy for **all** elements of `collection`. + * Iteration is stopped once `predicate` returns falsey. The predicate is + * invoked with three arguments: (value, index|key, collection). + * + * **Note:** This method returns `true` for + * [empty collections](https://en.wikipedia.org/wiki/Empty_set) because + * [everything is true](https://en.wikipedia.org/wiki/Vacuous_truth) of + * elements of empty collections. + * + * @static + * @memberOf _ + * @since 0.1.0 + * @category Collection + * @param {Array|Object} collection The collection to iterate over. + * @param {Function} [predicate=_.identity] The function invoked per iteration. + * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`. + * @returns {boolean} Returns `true` if all elements pass the predicate check, + * else `false`. + * @example + * + * _.every([true, 1, null, 'yes'], Boolean); + * // => false + * + * var users = [ + * { 'user': 'barney', 'age': 36, 'active': false }, + * { 'user': 'fred', 'age': 40, 'active': false } + * ]; + * + * // The `_.matches` iteratee shorthand. + * _.every(users, { 'user': 'barney', 'active': false }); + * // => false + * + * // The `_.matchesProperty` iteratee shorthand. + * _.every(users, ['active', false]); + * // => true + * + * // The `_.property` iteratee shorthand. + * _.every(users, 'active'); + * // => false + */ + function every(collection, predicate, guard) { + var func = isArray(collection) ? arrayEvery : baseEvery; + if (guard && isIterateeCall(collection, predicate, guard)) { + predicate = undefined; + } + return func(collection, getIteratee(predicate, 3)); + } + + /** + * Iterates over elements of `collection`, returning an array of all elements + * `predicate` returns truthy for. The predicate is invoked with three + * arguments: (value, index|key, collection). + * + * **Note:** Unlike `_.remove`, this method returns a new array. + * + * @static + * @memberOf _ + * @since 0.1.0 + * @category Collection + * @param {Array|Object} collection The collection to iterate over. + * @param {Function} [predicate=_.identity] The function invoked per iteration. + * @returns {Array} Returns the new filtered array. + * @see _.reject + * @example + * + * var users = [ + * { 'user': 'barney', 'age': 36, 'active': true }, + * { 'user': 'fred', 'age': 40, 'active': false } + * ]; + * + * _.filter(users, function(o) { return !o.active; }); + * // => objects for ['fred'] + * + * // The `_.matches` iteratee shorthand. + * _.filter(users, { 'age': 36, 'active': true }); + * // => objects for ['barney'] + * + * // The `_.matchesProperty` iteratee shorthand. + * _.filter(users, ['active', false]); + * // => objects for ['fred'] + * + * // The `_.property` iteratee shorthand. + * _.filter(users, 'active'); + * // => objects for ['barney'] + */ + function filter(collection, predicate) { + var func = isArray(collection) ? arrayFilter : baseFilter; + return func(collection, getIteratee(predicate, 3)); + } + + /** + * Iterates over elements of `collection`, returning the first element + * `predicate` returns truthy for. The predicate is invoked with three + * arguments: (value, index|key, collection). + * + * @static + * @memberOf _ + * @since 0.1.0 + * @category Collection + * @param {Array|Object} collection The collection to inspect. + * @param {Function} [predicate=_.identity] The function invoked per iteration. + * @param {number} [fromIndex=0] The index to search from. + * @returns {*} Returns the matched element, else `undefined`. + * @example + * + * var users = [ + * { 'user': 'barney', 'age': 36, 'active': true }, + * { 'user': 'fred', 'age': 40, 'active': false }, + * { 'user': 'pebbles', 'age': 1, 'active': true } + * ]; + * + * _.find(users, function(o) { return o.age < 40; }); + * // => object for 'barney' + * + * // The `_.matches` iteratee shorthand. + * _.find(users, { 'age': 1, 'active': true }); + * // => object for 'pebbles' + * + * // The `_.matchesProperty` iteratee shorthand. + * _.find(users, ['active', false]); + * // => object for 'fred' + * + * // The `_.property` iteratee shorthand. + * _.find(users, 'active'); + * // => object for 'barney' + */ + var find = createFind(findIndex); + + /** + * This method is like `_.find` except that it iterates over elements of + * `collection` from right to left. + * + * @static + * @memberOf _ + * @since 2.0.0 + * @category Collection + * @param {Array|Object} collection The collection to inspect. + * @param {Function} [predicate=_.identity] The function invoked per iteration. + * @param {number} [fromIndex=collection.length-1] The index to search from. + * @returns {*} Returns the matched element, else `undefined`. + * @example + * + * _.findLast([1, 2, 3, 4], function(n) { + * return n % 2 == 1; + * }); + * // => 3 + */ + var findLast = createFind(findLastIndex); + + /** + * Creates a flattened array of values by running each element in `collection` + * thru `iteratee` and flattening the mapped results. The iteratee is invoked + * with three arguments: (value, index|key, collection). + * + * @static + * @memberOf _ + * @since 4.0.0 + * @category Collection + * @param {Array|Object} collection The collection to iterate over. + * @param {Function} [iteratee=_.identity] The function invoked per iteration. + * @returns {Array} Returns the new flattened array. + * @example + * + * function duplicate(n) { + * return [n, n]; + * } + * + * _.flatMap([1, 2], duplicate); + * // => [1, 1, 2, 2] + */ + function flatMap(collection, iteratee) { + return baseFlatten(map(collection, iteratee), 1); + } + + /** + * This method is like `_.flatMap` except that it recursively flattens the + * mapped results. + * + * @static + * @memberOf _ + * @since 4.7.0 + * @category Collection + * @param {Array|Object} collection The collection to iterate over. + * @param {Function} [iteratee=_.identity] The function invoked per iteration. + * @returns {Array} Returns the new flattened array. + * @example + * + * function duplicate(n) { + * return [[[n, n]]]; + * } + * + * _.flatMapDeep([1, 2], duplicate); + * // => [1, 1, 2, 2] + */ + function flatMapDeep(collection, iteratee) { + return baseFlatten(map(collection, iteratee), INFINITY); + } + + /** + * This method is like `_.flatMap` except that it recursively flattens the + * mapped results up to `depth` times. + * + * @static + * @memberOf _ + * @since 4.7.0 + * @category Collection + * @param {Array|Object} collection The collection to iterate over. + * @param {Function} [iteratee=_.identity] The function invoked per iteration. + * @param {number} [depth=1] The maximum recursion depth. + * @returns {Array} Returns the new flattened array. + * @example + * + * function duplicate(n) { + * return [[[n, n]]]; + * } + * + * _.flatMapDepth([1, 2], duplicate, 2); + * // => [[1, 1], [2, 2]] + */ + function flatMapDepth(collection, iteratee, depth) { + depth = depth === undefined ? 1 : toInteger(depth); + return baseFlatten(map(collection, iteratee), depth); + } + + /** + * Iterates over elements of `collection` and invokes `iteratee` for each element. + * The iteratee is invoked with three arguments: (value, index|key, collection). + * Iteratee functions may exit iteration early by explicitly returning `false`. + * + * **Note:** As with other "Collections" methods, objects with a "length" + * property are iterated like arrays. To avoid this behavior use `_.forIn` + * or `_.forOwn` for object iteration. + * + * @static + * @memberOf _ + * @since 0.1.0 + * @alias each + * @category Collection + * @param {Array|Object} collection The collection to iterate over. + * @param {Function} [iteratee=_.identity] The function invoked per iteration. + * @returns {Array|Object} Returns `collection`. + * @see _.forEachRight + * @example + * + * _.forEach([1, 2], function(value) { + * console.log(value); + * }); + * // => Logs `1` then `2`. + * + * _.forEach({ 'a': 1, 'b': 2 }, function(value, key) { + * console.log(key); + * }); + * // => Logs 'a' then 'b' (iteration order is not guaranteed). + */ + function forEach(collection, iteratee) { + var func = isArray(collection) ? arrayEach : baseEach; + return func(collection, getIteratee(iteratee, 3)); + } + + /** + * This method is like `_.forEach` except that it iterates over elements of + * `collection` from right to left. + * + * @static + * @memberOf _ + * @since 2.0.0 + * @alias eachRight + * @category Collection + * @param {Array|Object} collection The collection to iterate over. + * @param {Function} [iteratee=_.identity] The function invoked per iteration. + * @returns {Array|Object} Returns `collection`. + * @see _.forEach + * @example + * + * _.forEachRight([1, 2], function(value) { + * console.log(value); + * }); + * // => Logs `2` then `1`. + */ + function forEachRight(collection, iteratee) { + var func = isArray(collection) ? arrayEachRight : baseEachRight; + return func(collection, getIteratee(iteratee, 3)); + } + + /** + * Creates an object composed of keys generated from the results of running + * each element of `collection` thru `iteratee`. The order of grouped values + * is determined by the order they occur in `collection`. The corresponding + * value of each key is an array of elements responsible for generating the + * key. The iteratee is invoked with one argument: (value). + * + * @static + * @memberOf _ + * @since 0.1.0 + * @category Collection + * @param {Array|Object} collection The collection to iterate over. + * @param {Function} [iteratee=_.identity] The iteratee to transform keys. + * @returns {Object} Returns the composed aggregate object. + * @example + * + * _.groupBy([6.1, 4.2, 6.3], Math.floor); + * // => { '4': [4.2], '6': [6.1, 6.3] } + * + * // The `_.property` iteratee shorthand. + * _.groupBy(['one', 'two', 'three'], 'length'); + * // => { '3': ['one', 'two'], '5': ['three'] } + */ + var groupBy = createAggregator(function(result, value, key) { + if (hasOwnProperty.call(result, key)) { + result[key].push(value); + } else { + baseAssignValue(result, key, [value]); + } + }); + + /** + * Checks if `value` is in `collection`. If `collection` is a string, it's + * checked for a substring of `value`, otherwise + * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero) + * is used for equality comparisons. If `fromIndex` is negative, it's used as + * the offset from the end of `collection`. + * + * @static + * @memberOf _ + * @since 0.1.0 + * @category Collection + * @param {Array|Object|string} collection The collection to inspect. + * @param {*} value The value to search for. + * @param {number} [fromIndex=0] The index to search from. + * @param- {Object} [guard] Enables use as an iteratee for methods like `_.reduce`. + * @returns {boolean} Returns `true` if `value` is found, else `false`. + * @example + * + * _.includes([1, 2, 3], 1); + * // => true + * + * _.includes([1, 2, 3], 1, 2); + * // => false + * + * _.includes({ 'a': 1, 'b': 2 }, 1); + * // => true + * + * _.includes('abcd', 'bc'); + * // => true + */ + function includes(collection, value, fromIndex, guard) { + collection = isArrayLike(collection) ? collection : values(collection); + fromIndex = (fromIndex && !guard) ? toInteger(fromIndex) : 0; + + var length = collection.length; + if (fromIndex < 0) { + fromIndex = nativeMax(length + fromIndex, 0); + } + return isString(collection) + ? (fromIndex <= length && collection.indexOf(value, fromIndex) > -1) + : (!!length && baseIndexOf(collection, value, fromIndex) > -1); + } + + /** + * Invokes the method at `path` of each element in `collection`, returning + * an array of the results of each invoked method. Any additional arguments + * are provided to each invoked method. If `path` is a function, it's invoked + * for, and `this` bound to, each element in `collection`. + * + * @static + * @memberOf _ + * @since 4.0.0 + * @category Collection + * @param {Array|Object} collection The collection to iterate over. + * @param {Array|Function|string} path The path of the method to invoke or + * the function invoked per iteration. + * @param {...*} [args] The arguments to invoke each method with. + * @returns {Array} Returns the array of results. + * @example + * + * _.invokeMap([[5, 1, 7], [3, 2, 1]], 'sort'); + * // => [[1, 5, 7], [1, 2, 3]] + * + * _.invokeMap([123, 456], String.prototype.split, ''); + * // => [['1', '2', '3'], ['4', '5', '6']] + */ + var invokeMap = baseRest(function(collection, path, args) { + var index = -1, + isFunc = typeof path == 'function', + result = isArrayLike(collection) ? Array(collection.length) : []; + + baseEach(collection, function(value) { + result[++index] = isFunc ? apply(path, value, args) : baseInvoke(value, path, args); + }); + return result; + }); + + /** + * Creates an object composed of keys generated from the results of running + * each element of `collection` thru `iteratee`. The corresponding value of + * each key is the last element responsible for generating the key. The + * iteratee is invoked with one argument: (value). + * + * @static + * @memberOf _ + * @since 4.0.0 + * @category Collection + * @param {Array|Object} collection The collection to iterate over. + * @param {Function} [iteratee=_.identity] The iteratee to transform keys. + * @returns {Object} Returns the composed aggregate object. + * @example + * + * var array = [ + * { 'dir': 'left', 'code': 97 }, + * { 'dir': 'right', 'code': 100 } + * ]; + * + * _.keyBy(array, function(o) { + * return String.fromCharCode(o.code); + * }); + * // => { 'a': { 'dir': 'left', 'code': 97 }, 'd': { 'dir': 'right', 'code': 100 } } + * + * _.keyBy(array, 'dir'); + * // => { 'left': { 'dir': 'left', 'code': 97 }, 'right': { 'dir': 'right', 'code': 100 } } + */ + var keyBy = createAggregator(function(result, value, key) { + baseAssignValue(result, key, value); + }); + + /** + * Creates an array of values by running each element in `collection` thru + * `iteratee`. The iteratee is invoked with three arguments: + * (value, index|key, collection). + * + * Many lodash methods are guarded to work as iteratees for methods like + * `_.every`, `_.filter`, `_.map`, `_.mapValues`, `_.reject`, and `_.some`. + * + * The guarded methods are: + * `ary`, `chunk`, `curry`, `curryRight`, `drop`, `dropRight`, `every`, + * `fill`, `invert`, `parseInt`, `random`, `range`, `rangeRight`, `repeat`, + * `sampleSize`, `slice`, `some`, `sortBy`, `split`, `take`, `takeRight`, + * `template`, `trim`, `trimEnd`, `trimStart`, and `words` + * + * @static + * @memberOf _ + * @since 0.1.0 + * @category Collection + * @param {Array|Object} collection The collection to iterate over. + * @param {Function} [iteratee=_.identity] The function invoked per iteration. + * @returns {Array} Returns the new mapped array. + * @example + * + * function square(n) { + * return n * n; + * } + * + * _.map([4, 8], square); + * // => [16, 64] + * + * _.map({ 'a': 4, 'b': 8 }, square); + * // => [16, 64] (iteration order is not guaranteed) + * + * var users = [ + * { 'user': 'barney' }, + * { 'user': 'fred' } + * ]; + * + * // The `_.property` iteratee shorthand. + * _.map(users, 'user'); + * // => ['barney', 'fred'] + */ + function map(collection, iteratee) { + var func = isArray(collection) ? arrayMap : baseMap; + return func(collection, getIteratee(iteratee, 3)); + } + + /** + * This method is like `_.sortBy` except that it allows specifying the sort + * orders of the iteratees to sort by. If `orders` is unspecified, all values + * are sorted in ascending order. Otherwise, specify an order of "desc" for + * descending or "asc" for ascending sort order of corresponding values. + * + * @static + * @memberOf _ + * @since 4.0.0 + * @category Collection + * @param {Array|Object} collection The collection to iterate over. + * @param {Array[]|Function[]|Object[]|string[]} [iteratees=[_.identity]] + * The iteratees to sort by. + * @param {string[]} [orders] The sort orders of `iteratees`. + * @param- {Object} [guard] Enables use as an iteratee for methods like `_.reduce`. + * @returns {Array} Returns the new sorted array. + * @example + * + * var users = [ + * { 'user': 'fred', 'age': 48 }, + * { 'user': 'barney', 'age': 34 }, + * { 'user': 'fred', 'age': 40 }, + * { 'user': 'barney', 'age': 36 } + * ]; + * + * // Sort by `user` in ascending order and by `age` in descending order. + * _.orderBy(users, ['user', 'age'], ['asc', 'desc']); + * // => objects for [['barney', 36], ['barney', 34], ['fred', 48], ['fred', 40]] + */ + function orderBy(collection, iteratees, orders, guard) { + if (collection == null) { + return []; + } + if (!isArray(iteratees)) { + iteratees = iteratees == null ? [] : [iteratees]; + } + orders = guard ? undefined : orders; + if (!isArray(orders)) { + orders = orders == null ? [] : [orders]; + } + return baseOrderBy(collection, iteratees, orders); + } + + /** + * Creates an array of elements split into two groups, the first of which + * contains elements `predicate` returns truthy for, the second of which + * contains elements `predicate` returns falsey for. The predicate is + * invoked with one argument: (value). + * + * @static + * @memberOf _ + * @since 3.0.0 + * @category Collection + * @param {Array|Object} collection The collection to iterate over. + * @param {Function} [predicate=_.identity] The function invoked per iteration. + * @returns {Array} Returns the array of grouped elements. + * @example + * + * var users = [ + * { 'user': 'barney', 'age': 36, 'active': false }, + * { 'user': 'fred', 'age': 40, 'active': true }, + * { 'user': 'pebbles', 'age': 1, 'active': false } + * ]; + * + * _.partition(users, function(o) { return o.active; }); + * // => objects for [['fred'], ['barney', 'pebbles']] + * + * // The `_.matches` iteratee shorthand. + * _.partition(users, { 'age': 1, 'active': false }); + * // => objects for [['pebbles'], ['barney', 'fred']] + * + * // The `_.matchesProperty` iteratee shorthand. + * _.partition(users, ['active', false]); + * // => objects for [['barney', 'pebbles'], ['fred']] + * + * // The `_.property` iteratee shorthand. + * _.partition(users, 'active'); + * // => objects for [['fred'], ['barney', 'pebbles']] + */ + var partition = createAggregator(function(result, value, key) { + result[key ? 0 : 1].push(value); + }, function() { return [[], []]; }); + + /** + * Reduces `collection` to a value which is the accumulated result of running + * each element in `collection` thru `iteratee`, where each successive + * invocation is supplied the return value of the previous. If `accumulator` + * is not given, the first element of `collection` is used as the initial + * value. The iteratee is invoked with four arguments: + * (accumulator, value, index|key, collection). + * + * Many lodash methods are guarded to work as iteratees for methods like + * `_.reduce`, `_.reduceRight`, and `_.transform`. + * + * The guarded methods are: + * `assign`, `defaults`, `defaultsDeep`, `includes`, `merge`, `orderBy`, + * and `sortBy` + * + * @static + * @memberOf _ + * @since 0.1.0 + * @category Collection + * @param {Array|Object} collection The collection to iterate over. + * @param {Function} [iteratee=_.identity] The function invoked per iteration. + * @param {*} [accumulator] The initial value. + * @returns {*} Returns the accumulated value. + * @see _.reduceRight + * @example + * + * _.reduce([1, 2], function(sum, n) { + * return sum + n; + * }, 0); + * // => 3 + * + * _.reduce({ 'a': 1, 'b': 2, 'c': 1 }, function(result, value, key) { + * (result[value] || (result[value] = [])).push(key); + * return result; + * }, {}); + * // => { '1': ['a', 'c'], '2': ['b'] } (iteration order is not guaranteed) + */ + function reduce(collection, iteratee, accumulator) { + var func = isArray(collection) ? arrayReduce : baseReduce, + initAccum = arguments.length < 3; + + return func(collection, getIteratee(iteratee, 4), accumulator, initAccum, baseEach); + } + + /** + * This method is like `_.reduce` except that it iterates over elements of + * `collection` from right to left. + * + * @static + * @memberOf _ + * @since 0.1.0 + * @category Collection + * @param {Array|Object} collection The collection to iterate over. + * @param {Function} [iteratee=_.identity] The function invoked per iteration. + * @param {*} [accumulator] The initial value. + * @returns {*} Returns the accumulated value. + * @see _.reduce + * @example + * + * var array = [[0, 1], [2, 3], [4, 5]]; + * + * _.reduceRight(array, function(flattened, other) { + * return flattened.concat(other); + * }, []); + * // => [4, 5, 2, 3, 0, 1] + */ + function reduceRight(collection, iteratee, accumulator) { + var func = isArray(collection) ? arrayReduceRight : baseReduce, + initAccum = arguments.length < 3; + + return func(collection, getIteratee(iteratee, 4), accumulator, initAccum, baseEachRight); + } + + /** + * The opposite of `_.filter`; this method returns the elements of `collection` + * that `predicate` does **not** return truthy for. + * + * @static + * @memberOf _ + * @since 0.1.0 + * @category Collection + * @param {Array|Object} collection The collection to iterate over. + * @param {Function} [predicate=_.identity] The function invoked per iteration. + * @returns {Array} Returns the new filtered array. + * @see _.filter + * @example + * + * var users = [ + * { 'user': 'barney', 'age': 36, 'active': false }, + * { 'user': 'fred', 'age': 40, 'active': true } + * ]; + * + * _.reject(users, function(o) { return !o.active; }); + * // => objects for ['fred'] + * + * // The `_.matches` iteratee shorthand. + * _.reject(users, { 'age': 40, 'active': true }); + * // => objects for ['barney'] + * + * // The `_.matchesProperty` iteratee shorthand. + * _.reject(users, ['active', false]); + * // => objects for ['fred'] + * + * // The `_.property` iteratee shorthand. + * _.reject(users, 'active'); + * // => objects for ['barney'] + */ + function reject(collection, predicate) { + var func = isArray(collection) ? arrayFilter : baseFilter; + return func(collection, negate(getIteratee(predicate, 3))); + } + + /** + * Gets a random element from `collection`. + * + * @static + * @memberOf _ + * @since 2.0.0 + * @category Collection + * @param {Array|Object} collection The collection to sample. + * @returns {*} Returns the random element. + * @example + * + * _.sample([1, 2, 3, 4]); + * // => 2 + */ + function sample(collection) { + var func = isArray(collection) ? arraySample : baseSample; + return func(collection); + } + + /** + * Gets `n` random elements at unique keys from `collection` up to the + * size of `collection`. + * + * @static + * @memberOf _ + * @since 4.0.0 + * @category Collection + * @param {Array|Object} collection The collection to sample. + * @param {number} [n=1] The number of elements to sample. + * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`. + * @returns {Array} Returns the random elements. + * @example + * + * _.sampleSize([1, 2, 3], 2); + * // => [3, 1] + * + * _.sampleSize([1, 2, 3], 4); + * // => [2, 3, 1] + */ + function sampleSize(collection, n, guard) { + if ((guard ? isIterateeCall(collection, n, guard) : n === undefined)) { + n = 1; + } else { + n = toInteger(n); + } + var func = isArray(collection) ? arraySampleSize : baseSampleSize; + return func(collection, n); + } + + /** + * Creates an array of shuffled values, using a version of the + * [Fisher-Yates shuffle](https://en.wikipedia.org/wiki/Fisher-Yates_shuffle). + * + * @static + * @memberOf _ + * @since 0.1.0 + * @category Collection + * @param {Array|Object} collection The collection to shuffle. + * @returns {Array} Returns the new shuffled array. + * @example + * + * _.shuffle([1, 2, 3, 4]); + * // => [4, 1, 3, 2] + */ + function shuffle(collection) { + var func = isArray(collection) ? arrayShuffle : baseShuffle; + return func(collection); + } + + /** + * Gets the size of `collection` by returning its length for array-like + * values or the number of own enumerable string keyed properties for objects. + * + * @static + * @memberOf _ + * @since 0.1.0 + * @category Collection + * @param {Array|Object|string} collection The collection to inspect. + * @returns {number} Returns the collection size. + * @example + * + * _.size([1, 2, 3]); + * // => 3 + * + * _.size({ 'a': 1, 'b': 2 }); + * // => 2 + * + * _.size('pebbles'); + * // => 7 + */ + function size(collection) { + if (collection == null) { + return 0; + } + if (isArrayLike(collection)) { + return isString(collection) ? stringSize(collection) : collection.length; + } + var tag = getTag(collection); + if (tag == mapTag || tag == setTag) { + return collection.size; + } + return baseKeys(collection).length; + } + + /** + * Checks if `predicate` returns truthy for **any** element of `collection`. + * Iteration is stopped once `predicate` returns truthy. The predicate is + * invoked with three arguments: (value, index|key, collection). + * + * @static + * @memberOf _ + * @since 0.1.0 + * @category Collection + * @param {Array|Object} collection The collection to iterate over. + * @param {Function} [predicate=_.identity] The function invoked per iteration. + * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`. + * @returns {boolean} Returns `true` if any element passes the predicate check, + * else `false`. + * @example + * + * _.some([null, 0, 'yes', false], Boolean); + * // => true + * + * var users = [ + * { 'user': 'barney', 'active': true }, + * { 'user': 'fred', 'active': false } + * ]; + * + * // The `_.matches` iteratee shorthand. + * _.some(users, { 'user': 'barney', 'active': false }); + * // => false + * + * // The `_.matchesProperty` iteratee shorthand. + * _.some(users, ['active', false]); + * // => true + * + * // The `_.property` iteratee shorthand. + * _.some(users, 'active'); + * // => true + */ + function some(collection, predicate, guard) { + var func = isArray(collection) ? arraySome : baseSome; + if (guard && isIterateeCall(collection, predicate, guard)) { + predicate = undefined; + } + return func(collection, getIteratee(predicate, 3)); + } + + /** + * Creates an array of elements, sorted in ascending order by the results of + * running each element in a collection thru each iteratee. This method + * performs a stable sort, that is, it preserves the original sort order of + * equal elements. The iteratees are invoked with one argument: (value). + * + * @static + * @memberOf _ + * @since 0.1.0 + * @category Collection + * @param {Array|Object} collection The collection to iterate over. + * @param {...(Function|Function[])} [iteratees=[_.identity]] + * The iteratees to sort by. + * @returns {Array} Returns the new sorted array. + * @example + * + * var users = [ + * { 'user': 'fred', 'age': 48 }, + * { 'user': 'barney', 'age': 36 }, + * { 'user': 'fred', 'age': 40 }, + * { 'user': 'barney', 'age': 34 } + * ]; + * + * _.sortBy(users, [function(o) { return o.user; }]); + * // => objects for [['barney', 36], ['barney', 34], ['fred', 48], ['fred', 40]] + * + * _.sortBy(users, ['user', 'age']); + * // => objects for [['barney', 34], ['barney', 36], ['fred', 40], ['fred', 48]] + */ + var sortBy = baseRest(function(collection, iteratees) { + if (collection == null) { + return []; + } + var length = iteratees.length; + if (length > 1 && isIterateeCall(collection, iteratees[0], iteratees[1])) { + iteratees = []; + } else if (length > 2 && isIterateeCall(iteratees[0], iteratees[1], iteratees[2])) { + iteratees = [iteratees[0]]; + } + return baseOrderBy(collection, baseFlatten(iteratees, 1), []); + }); + + /*------------------------------------------------------------------------*/ + + /** + * Gets the timestamp of the number of milliseconds that have elapsed since + * the Unix epoch (1 January 1970 00:00:00 UTC). + * + * @static + * @memberOf _ + * @since 2.4.0 + * @category Date + * @returns {number} Returns the timestamp. + * @example + * + * _.defer(function(stamp) { + * console.log(_.now() - stamp); + * }, _.now()); + * // => Logs the number of milliseconds it took for the deferred invocation. + */ + var now = ctxNow || function() { + return root.Date.now(); + }; + + /*------------------------------------------------------------------------*/ + + /** + * The opposite of `_.before`; this method creates a function that invokes + * `func` once it's called `n` or more times. + * + * @static + * @memberOf _ + * @since 0.1.0 + * @category Function + * @param {number} n The number of calls before `func` is invoked. + * @param {Function} func The function to restrict. + * @returns {Function} Returns the new restricted function. + * @example + * + * var saves = ['profile', 'settings']; + * + * var done = _.after(saves.length, function() { + * console.log('done saving!'); + * }); + * + * _.forEach(saves, function(type) { + * asyncSave({ 'type': type, 'complete': done }); + * }); + * // => Logs 'done saving!' after the two async saves have completed. + */ + function after(n, func) { + if (typeof func != 'function') { + throw new TypeError(FUNC_ERROR_TEXT); + } + n = toInteger(n); + return function() { + if (--n < 1) { + return func.apply(this, arguments); + } + }; + } + + /** + * Creates a function that invokes `func`, with up to `n` arguments, + * ignoring any additional arguments. + * + * @static + * @memberOf _ + * @since 3.0.0 + * @category Function + * @param {Function} func The function to cap arguments for. + * @param {number} [n=func.length] The arity cap. + * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`. + * @returns {Function} Returns the new capped function. + * @example + * + * _.map(['6', '8', '10'], _.ary(parseInt, 1)); + * // => [6, 8, 10] + */ + function ary(func, n, guard) { + n = guard ? undefined : n; + n = (func && n == null) ? func.length : n; + return createWrap(func, WRAP_ARY_FLAG, undefined, undefined, undefined, undefined, n); + } + + /** + * Creates a function that invokes `func`, with the `this` binding and arguments + * of the created function, while it's called less than `n` times. Subsequent + * calls to the created function return the result of the last `func` invocation. + * + * @static + * @memberOf _ + * @since 3.0.0 + * @category Function + * @param {number} n The number of calls at which `func` is no longer invoked. + * @param {Function} func The function to restrict. + * @returns {Function} Returns the new restricted function. + * @example + * + * jQuery(element).on('click', _.before(5, addContactToList)); + * // => Allows adding up to 4 contacts to the list. + */ + function before(n, func) { + var result; + if (typeof func != 'function') { + throw new TypeError(FUNC_ERROR_TEXT); + } + n = toInteger(n); + return function() { + if (--n > 0) { + result = func.apply(this, arguments); + } + if (n <= 1) { + func = undefined; + } + return result; + }; + } + + /** + * Creates a function that invokes `func` with the `this` binding of `thisArg` + * and `partials` prepended to the arguments it receives. + * + * The `_.bind.placeholder` value, which defaults to `_` in monolithic builds, + * may be used as a placeholder for partially applied arguments. + * + * **Note:** Unlike native `Function#bind`, this method doesn't set the "length" + * property of bound functions. + * + * @static + * @memberOf _ + * @since 0.1.0 + * @category Function + * @param {Function} func The function to bind. + * @param {*} thisArg The `this` binding of `func`. + * @param {...*} [partials] The arguments to be partially applied. + * @returns {Function} Returns the new bound function. + * @example + * + * function greet(greeting, punctuation) { + * return greeting + ' ' + this.user + punctuation; + * } + * + * var object = { 'user': 'fred' }; + * + * var bound = _.bind(greet, object, 'hi'); + * bound('!'); + * // => 'hi fred!' + * + * // Bound with placeholders. + * var bound = _.bind(greet, object, _, '!'); + * bound('hi'); + * // => 'hi fred!' + */ + var bind = baseRest(function(func, thisArg, partials) { + var bitmask = WRAP_BIND_FLAG; + if (partials.length) { + var holders = replaceHolders(partials, getHolder(bind)); + bitmask |= WRAP_PARTIAL_FLAG; + } + return createWrap(func, bitmask, thisArg, partials, holders); + }); + + /** + * Creates a function that invokes the method at `object[key]` with `partials` + * prepended to the arguments it receives. + * + * This method differs from `_.bind` by allowing bound functions to reference + * methods that may be redefined or don't yet exist. See + * [Peter Michaux's article](http://peter.michaux.ca/articles/lazy-function-definition-pattern) + * for more details. + * + * The `_.bindKey.placeholder` value, which defaults to `_` in monolithic + * builds, may be used as a placeholder for partially applied arguments. + * + * @static + * @memberOf _ + * @since 0.10.0 + * @category Function + * @param {Object} object The object to invoke the method on. + * @param {string} key The key of the method. + * @param {...*} [partials] The arguments to be partially applied. + * @returns {Function} Returns the new bound function. + * @example + * + * var object = { + * 'user': 'fred', + * 'greet': function(greeting, punctuation) { + * return greeting + ' ' + this.user + punctuation; + * } + * }; + * + * var bound = _.bindKey(object, 'greet', 'hi'); + * bound('!'); + * // => 'hi fred!' + * + * object.greet = function(greeting, punctuation) { + * return greeting + 'ya ' + this.user + punctuation; + * }; + * + * bound('!'); + * // => 'hiya fred!' + * + * // Bound with placeholders. + * var bound = _.bindKey(object, 'greet', _, '!'); + * bound('hi'); + * // => 'hiya fred!' + */ + var bindKey = baseRest(function(object, key, partials) { + var bitmask = WRAP_BIND_FLAG | WRAP_BIND_KEY_FLAG; + if (partials.length) { + var holders = replaceHolders(partials, getHolder(bindKey)); + bitmask |= WRAP_PARTIAL_FLAG; + } + return createWrap(key, bitmask, object, partials, holders); + }); + + /** + * Creates a function that accepts arguments of `func` and either invokes + * `func` returning its result, if at least `arity` number of arguments have + * been provided, or returns a function that accepts the remaining `func` + * arguments, and so on. The arity of `func` may be specified if `func.length` + * is not sufficient. + * + * The `_.curry.placeholder` value, which defaults to `_` in monolithic builds, + * may be used as a placeholder for provided arguments. + * + * **Note:** This method doesn't set the "length" property of curried functions. + * + * @static + * @memberOf _ + * @since 2.0.0 + * @category Function + * @param {Function} func The function to curry. + * @param {number} [arity=func.length] The arity of `func`. + * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`. + * @returns {Function} Returns the new curried function. + * @example + * + * var abc = function(a, b, c) { + * return [a, b, c]; + * }; + * + * var curried = _.curry(abc); + * + * curried(1)(2)(3); + * // => [1, 2, 3] + * + * curried(1, 2)(3); + * // => [1, 2, 3] + * + * curried(1, 2, 3); + * // => [1, 2, 3] + * + * // Curried with placeholders. + * curried(1)(_, 3)(2); + * // => [1, 2, 3] + */ + function curry(func, arity, guard) { + arity = guard ? undefined : arity; + var result = createWrap(func, WRAP_CURRY_FLAG, undefined, undefined, undefined, undefined, undefined, arity); + result.placeholder = curry.placeholder; + return result; + } + + /** + * This method is like `_.curry` except that arguments are applied to `func` + * in the manner of `_.partialRight` instead of `_.partial`. + * + * The `_.curryRight.placeholder` value, which defaults to `_` in monolithic + * builds, may be used as a placeholder for provided arguments. + * + * **Note:** This method doesn't set the "length" property of curried functions. + * + * @static + * @memberOf _ + * @since 3.0.0 + * @category Function + * @param {Function} func The function to curry. + * @param {number} [arity=func.length] The arity of `func`. + * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`. + * @returns {Function} Returns the new curried function. + * @example + * + * var abc = function(a, b, c) { + * return [a, b, c]; + * }; + * + * var curried = _.curryRight(abc); + * + * curried(3)(2)(1); + * // => [1, 2, 3] + * + * curried(2, 3)(1); + * // => [1, 2, 3] + * + * curried(1, 2, 3); + * // => [1, 2, 3] + * + * // Curried with placeholders. + * curried(3)(1, _)(2); + * // => [1, 2, 3] + */ + function curryRight(func, arity, guard) { + arity = guard ? undefined : arity; + var result = createWrap(func, WRAP_CURRY_RIGHT_FLAG, undefined, undefined, undefined, undefined, undefined, arity); + result.placeholder = curryRight.placeholder; + return result; + } + + /** + * Creates a debounced function that delays invoking `func` until after `wait` + * milliseconds have elapsed since the last time the debounced function was + * invoked. The debounced function comes with a `cancel` method to cancel + * delayed `func` invocations and a `flush` method to immediately invoke them. + * Provide `options` to indicate whether `func` should be invoked on the + * leading and/or trailing edge of the `wait` timeout. The `func` is invoked + * with the last arguments provided to the debounced function. Subsequent + * calls to the debounced function return the result of the last `func` + * invocation. + * + * **Note:** If `leading` and `trailing` options are `true`, `func` is + * invoked on the trailing edge of the timeout only if the debounced function + * is invoked more than once during the `wait` timeout. + * + * If `wait` is `0` and `leading` is `false`, `func` invocation is deferred + * until to the next tick, similar to `setTimeout` with a timeout of `0`. + * + * See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/) + * for details over the differences between `_.debounce` and `_.throttle`. + * + * @static + * @memberOf _ + * @since 0.1.0 + * @category Function + * @param {Function} func The function to debounce. + * @param {number} [wait=0] The number of milliseconds to delay. + * @param {Object} [options={}] The options object. + * @param {boolean} [options.leading=false] + * Specify invoking on the leading edge of the timeout. + * @param {number} [options.maxWait] + * The maximum time `func` is allowed to be delayed before it's invoked. + * @param {boolean} [options.trailing=true] + * Specify invoking on the trailing edge of the timeout. + * @returns {Function} Returns the new debounced function. + * @example + * + * // Avoid costly calculations while the window size is in flux. + * jQuery(window).on('resize', _.debounce(calculateLayout, 150)); + * + * // Invoke `sendMail` when clicked, debouncing subsequent calls. + * jQuery(element).on('click', _.debounce(sendMail, 300, { + * 'leading': true, + * 'trailing': false + * })); + * + * // Ensure `batchLog` is invoked once after 1 second of debounced calls. + * var debounced = _.debounce(batchLog, 250, { 'maxWait': 1000 }); + * var source = new EventSource('/stream'); + * jQuery(source).on('message', debounced); + * + * // Cancel the trailing debounced invocation. + * jQuery(window).on('popstate', debounced.cancel); + */ + function debounce(func, wait, options) { + var lastArgs, + lastThis, + maxWait, + result, + timerId, + lastCallTime, + lastInvokeTime = 0, + leading = false, + maxing = false, + trailing = true; + + if (typeof func != 'function') { + throw new TypeError(FUNC_ERROR_TEXT); + } + wait = toNumber(wait) || 0; + if (isObject(options)) { + leading = !!options.leading; + maxing = 'maxWait' in options; + maxWait = maxing ? nativeMax(toNumber(options.maxWait) || 0, wait) : maxWait; + trailing = 'trailing' in options ? !!options.trailing : trailing; + } + + function invokeFunc(time) { + var args = lastArgs, + thisArg = lastThis; + + lastArgs = lastThis = undefined; + lastInvokeTime = time; + result = func.apply(thisArg, args); + return result; + } + + function leadingEdge(time) { + // Reset any `maxWait` timer. + lastInvokeTime = time; + // Start the timer for the trailing edge. + timerId = setTimeout(timerExpired, wait); + // Invoke the leading edge. + return leading ? invokeFunc(time) : result; + } + + function remainingWait(time) { + var timeSinceLastCall = time - lastCallTime, + timeSinceLastInvoke = time - lastInvokeTime, + timeWaiting = wait - timeSinceLastCall; + + return maxing + ? nativeMin(timeWaiting, maxWait - timeSinceLastInvoke) + : timeWaiting; + } + + function shouldInvoke(time) { + var timeSinceLastCall = time - lastCallTime, + timeSinceLastInvoke = time - lastInvokeTime; + + // Either this is the first call, activity has stopped and we're at the + // trailing edge, the system time has gone backwards and we're treating + // it as the trailing edge, or we've hit the `maxWait` limit. + return (lastCallTime === undefined || (timeSinceLastCall >= wait) || + (timeSinceLastCall < 0) || (maxing && timeSinceLastInvoke >= maxWait)); + } + + function timerExpired() { + var time = now(); + if (shouldInvoke(time)) { + return trailingEdge(time); + } + // Restart the timer. + timerId = setTimeout(timerExpired, remainingWait(time)); + } + + function trailingEdge(time) { + timerId = undefined; + + // Only invoke if we have `lastArgs` which means `func` has been + // debounced at least once. + if (trailing && lastArgs) { + return invokeFunc(time); + } + lastArgs = lastThis = undefined; + return result; + } + + function cancel() { + if (timerId !== undefined) { + clearTimeout(timerId); + } + lastInvokeTime = 0; + lastArgs = lastCallTime = lastThis = timerId = undefined; + } + + function flush() { + return timerId === undefined ? result : trailingEdge(now()); + } + + function debounced() { + var time = now(), + isInvoking = shouldInvoke(time); + + lastArgs = arguments; + lastThis = this; + lastCallTime = time; + + if (isInvoking) { + if (timerId === undefined) { + return leadingEdge(lastCallTime); + } + if (maxing) { + // Handle invocations in a tight loop. + timerId = setTimeout(timerExpired, wait); + return invokeFunc(lastCallTime); + } + } + if (timerId === undefined) { + timerId = setTimeout(timerExpired, wait); + } + return result; + } + debounced.cancel = cancel; + debounced.flush = flush; + return debounced; + } + + /** + * Defers invoking the `func` until the current call stack has cleared. Any + * additional arguments are provided to `func` when it's invoked. + * + * @static + * @memberOf _ + * @since 0.1.0 + * @category Function + * @param {Function} func The function to defer. + * @param {...*} [args] The arguments to invoke `func` with. + * @returns {number} Returns the timer id. + * @example + * + * _.defer(function(text) { + * console.log(text); + * }, 'deferred'); + * // => Logs 'deferred' after one millisecond. + */ + var defer = baseRest(function(func, args) { + return baseDelay(func, 1, args); + }); + + /** + * Invokes `func` after `wait` milliseconds. Any additional arguments are + * provided to `func` when it's invoked. + * + * @static + * @memberOf _ + * @since 0.1.0 + * @category Function + * @param {Function} func The function to delay. + * @param {number} wait The number of milliseconds to delay invocation. + * @param {...*} [args] The arguments to invoke `func` with. + * @returns {number} Returns the timer id. + * @example + * + * _.delay(function(text) { + * console.log(text); + * }, 1000, 'later'); + * // => Logs 'later' after one second. + */ + var delay = baseRest(function(func, wait, args) { + return baseDelay(func, toNumber(wait) || 0, args); + }); + + /** + * Creates a function that invokes `func` with arguments reversed. + * + * @static + * @memberOf _ + * @since 4.0.0 + * @category Function + * @param {Function} func The function to flip arguments for. + * @returns {Function} Returns the new flipped function. + * @example + * + * var flipped = _.flip(function() { + * return _.toArray(arguments); + * }); + * + * flipped('a', 'b', 'c', 'd'); + * // => ['d', 'c', 'b', 'a'] + */ + function flip(func) { + return createWrap(func, WRAP_FLIP_FLAG); + } + + /** + * Creates a function that memoizes the result of `func`. If `resolver` is + * provided, it determines the cache key for storing the result based on the + * arguments provided to the memoized function. By default, the first argument + * provided to the memoized function is used as the map cache key. The `func` + * is invoked with the `this` binding of the memoized function. + * + * **Note:** The cache is exposed as the `cache` property on the memoized + * function. Its creation may be customized by replacing the `_.memoize.Cache` + * constructor with one whose instances implement the + * [`Map`](http://ecma-international.org/ecma-262/7.0/#sec-properties-of-the-map-prototype-object) + * method interface of `clear`, `delete`, `get`, `has`, and `set`. + * + * @static + * @memberOf _ + * @since 0.1.0 + * @category Function + * @param {Function} func The function to have its output memoized. + * @param {Function} [resolver] The function to resolve the cache key. + * @returns {Function} Returns the new memoized function. + * @example + * + * var object = { 'a': 1, 'b': 2 }; + * var other = { 'c': 3, 'd': 4 }; + * + * var values = _.memoize(_.values); + * values(object); + * // => [1, 2] + * + * values(other); + * // => [3, 4] + * + * object.a = 2; + * values(object); + * // => [1, 2] + * + * // Modify the result cache. + * values.cache.set(object, ['a', 'b']); + * values(object); + * // => ['a', 'b'] + * + * // Replace `_.memoize.Cache`. + * _.memoize.Cache = WeakMap; + */ + function memoize(func, resolver) { + if (typeof func != 'function' || (resolver != null && typeof resolver != 'function')) { + throw new TypeError(FUNC_ERROR_TEXT); + } + var memoized = function() { + var args = arguments, + key = resolver ? resolver.apply(this, args) : args[0], + cache = memoized.cache; + + if (cache.has(key)) { + return cache.get(key); + } + var result = func.apply(this, args); + memoized.cache = cache.set(key, result) || cache; + return result; + }; + memoized.cache = new (memoize.Cache || MapCache); + return memoized; + } + + // Expose `MapCache`. + memoize.Cache = MapCache; + + /** + * Creates a function that negates the result of the predicate `func`. The + * `func` predicate is invoked with the `this` binding and arguments of the + * created function. + * + * @static + * @memberOf _ + * @since 3.0.0 + * @category Function + * @param {Function} predicate The predicate to negate. + * @returns {Function} Returns the new negated function. + * @example + * + * function isEven(n) { + * return n % 2 == 0; + * } + * + * _.filter([1, 2, 3, 4, 5, 6], _.negate(isEven)); + * // => [1, 3, 5] + */ + function negate(predicate) { + if (typeof predicate != 'function') { + throw new TypeError(FUNC_ERROR_TEXT); + } + return function() { + var args = arguments; + switch (args.length) { + case 0: return !predicate.call(this); + case 1: return !predicate.call(this, args[0]); + case 2: return !predicate.call(this, args[0], args[1]); + case 3: return !predicate.call(this, args[0], args[1], args[2]); + } + return !predicate.apply(this, args); + }; + } + + /** + * Creates a function that is restricted to invoking `func` once. Repeat calls + * to the function return the value of the first invocation. The `func` is + * invoked with the `this` binding and arguments of the created function. + * + * @static + * @memberOf _ + * @since 0.1.0 + * @category Function + * @param {Function} func The function to restrict. + * @returns {Function} Returns the new restricted function. + * @example + * + * var initialize = _.once(createApplication); + * initialize(); + * initialize(); + * // => `createApplication` is invoked once + */ + function once(func) { + return before(2, func); + } + + /** + * Creates a function that invokes `func` with its arguments transformed. + * + * @static + * @since 4.0.0 + * @memberOf _ + * @category Function + * @param {Function} func The function to wrap. + * @param {...(Function|Function[])} [transforms=[_.identity]] + * The argument transforms. + * @returns {Function} Returns the new function. + * @example + * + * function doubled(n) { + * return n * 2; + * } + * + * function square(n) { + * return n * n; + * } + * + * var func = _.overArgs(function(x, y) { + * return [x, y]; + * }, [square, doubled]); + * + * func(9, 3); + * // => [81, 6] + * + * func(10, 5); + * // => [100, 10] + */ + var overArgs = castRest(function(func, transforms) { + transforms = (transforms.length == 1 && isArray(transforms[0])) + ? arrayMap(transforms[0], baseUnary(getIteratee())) + : arrayMap(baseFlatten(transforms, 1), baseUnary(getIteratee())); + + var funcsLength = transforms.length; + return baseRest(function(args) { + var index = -1, + length = nativeMin(args.length, funcsLength); + + while (++index < length) { + args[index] = transforms[index].call(this, args[index]); + } + return apply(func, this, args); + }); + }); + + /** + * Creates a function that invokes `func` with `partials` prepended to the + * arguments it receives. This method is like `_.bind` except it does **not** + * alter the `this` binding. + * + * The `_.partial.placeholder` value, which defaults to `_` in monolithic + * builds, may be used as a placeholder for partially applied arguments. + * + * **Note:** This method doesn't set the "length" property of partially + * applied functions. + * + * @static + * @memberOf _ + * @since 0.2.0 + * @category Function + * @param {Function} func The function to partially apply arguments to. + * @param {...*} [partials] The arguments to be partially applied. + * @returns {Function} Returns the new partially applied function. + * @example + * + * function greet(greeting, name) { + * return greeting + ' ' + name; + * } + * + * var sayHelloTo = _.partial(greet, 'hello'); + * sayHelloTo('fred'); + * // => 'hello fred' + * + * // Partially applied with placeholders. + * var greetFred = _.partial(greet, _, 'fred'); + * greetFred('hi'); + * // => 'hi fred' + */ + var partial = baseRest(function(func, partials) { + var holders = replaceHolders(partials, getHolder(partial)); + return createWrap(func, WRAP_PARTIAL_FLAG, undefined, partials, holders); + }); + + /** + * This method is like `_.partial` except that partially applied arguments + * are appended to the arguments it receives. + * + * The `_.partialRight.placeholder` value, which defaults to `_` in monolithic + * builds, may be used as a placeholder for partially applied arguments. + * + * **Note:** This method doesn't set the "length" property of partially + * applied functions. + * + * @static + * @memberOf _ + * @since 1.0.0 + * @category Function + * @param {Function} func The function to partially apply arguments to. + * @param {...*} [partials] The arguments to be partially applied. + * @returns {Function} Returns the new partially applied function. + * @example + * + * function greet(greeting, name) { + * return greeting + ' ' + name; + * } + * + * var greetFred = _.partialRight(greet, 'fred'); + * greetFred('hi'); + * // => 'hi fred' + * + * // Partially applied with placeholders. + * var sayHelloTo = _.partialRight(greet, 'hello', _); + * sayHelloTo('fred'); + * // => 'hello fred' + */ + var partialRight = baseRest(function(func, partials) { + var holders = replaceHolders(partials, getHolder(partialRight)); + return createWrap(func, WRAP_PARTIAL_RIGHT_FLAG, undefined, partials, holders); + }); + + /** + * Creates a function that invokes `func` with arguments arranged according + * to the specified `indexes` where the argument value at the first index is + * provided as the first argument, the argument value at the second index is + * provided as the second argument, and so on. + * + * @static + * @memberOf _ + * @since 3.0.0 + * @category Function + * @param {Function} func The function to rearrange arguments for. + * @param {...(number|number[])} indexes The arranged argument indexes. + * @returns {Function} Returns the new function. + * @example + * + * var rearged = _.rearg(function(a, b, c) { + * return [a, b, c]; + * }, [2, 0, 1]); + * + * rearged('b', 'c', 'a') + * // => ['a', 'b', 'c'] + */ + var rearg = flatRest(function(func, indexes) { + return createWrap(func, WRAP_REARG_FLAG, undefined, undefined, undefined, indexes); + }); + + /** + * Creates a function that invokes `func` with the `this` binding of the + * created function and arguments from `start` and beyond provided as + * an array. + * + * **Note:** This method is based on the + * [rest parameter](https://mdn.io/rest_parameters). + * + * @static + * @memberOf _ + * @since 4.0.0 + * @category Function + * @param {Function} func The function to apply a rest parameter to. + * @param {number} [start=func.length-1] The start position of the rest parameter. + * @returns {Function} Returns the new function. + * @example + * + * var say = _.rest(function(what, names) { + * return what + ' ' + _.initial(names).join(', ') + + * (_.size(names) > 1 ? ', & ' : '') + _.last(names); + * }); + * + * say('hello', 'fred', 'barney', 'pebbles'); + * // => 'hello fred, barney, & pebbles' + */ + function rest(func, start) { + if (typeof func != 'function') { + throw new TypeError(FUNC_ERROR_TEXT); + } + start = start === undefined ? start : toInteger(start); + return baseRest(func, start); + } + + /** + * Creates a function that invokes `func` with the `this` binding of the + * create function and an array of arguments much like + * [`Function#apply`](http://www.ecma-international.org/ecma-262/7.0/#sec-function.prototype.apply). + * + * **Note:** This method is based on the + * [spread operator](https://mdn.io/spread_operator). + * + * @static + * @memberOf _ + * @since 3.2.0 + * @category Function + * @param {Function} func The function to spread arguments over. + * @param {number} [start=0] The start position of the spread. + * @returns {Function} Returns the new function. + * @example + * + * var say = _.spread(function(who, what) { + * return who + ' says ' + what; + * }); + * + * say(['fred', 'hello']); + * // => 'fred says hello' + * + * var numbers = Promise.all([ + * Promise.resolve(40), + * Promise.resolve(36) + * ]); + * + * numbers.then(_.spread(function(x, y) { + * return x + y; + * })); + * // => a Promise of 76 + */ + function spread(func, start) { + if (typeof func != 'function') { + throw new TypeError(FUNC_ERROR_TEXT); + } + start = start == null ? 0 : nativeMax(toInteger(start), 0); + return baseRest(function(args) { + var array = args[start], + otherArgs = castSlice(args, 0, start); + + if (array) { + arrayPush(otherArgs, array); + } + return apply(func, this, otherArgs); + }); + } + + /** + * Creates a throttled function that only invokes `func` at most once per + * every `wait` milliseconds. The throttled function comes with a `cancel` + * method to cancel delayed `func` invocations and a `flush` method to + * immediately invoke them. Provide `options` to indicate whether `func` + * should be invoked on the leading and/or trailing edge of the `wait` + * timeout. The `func` is invoked with the last arguments provided to the + * throttled function. Subsequent calls to the throttled function return the + * result of the last `func` invocation. + * + * **Note:** If `leading` and `trailing` options are `true`, `func` is + * invoked on the trailing edge of the timeout only if the throttled function + * is invoked more than once during the `wait` timeout. + * + * If `wait` is `0` and `leading` is `false`, `func` invocation is deferred + * until to the next tick, similar to `setTimeout` with a timeout of `0`. + * + * See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/) + * for details over the differences between `_.throttle` and `_.debounce`. + * + * @static + * @memberOf _ + * @since 0.1.0 + * @category Function + * @param {Function} func The function to throttle. + * @param {number} [wait=0] The number of milliseconds to throttle invocations to. + * @param {Object} [options={}] The options object. + * @param {boolean} [options.leading=true] + * Specify invoking on the leading edge of the timeout. + * @param {boolean} [options.trailing=true] + * Specify invoking on the trailing edge of the timeout. + * @returns {Function} Returns the new throttled function. + * @example + * + * // Avoid excessively updating the position while scrolling. + * jQuery(window).on('scroll', _.throttle(updatePosition, 100)); + * + * // Invoke `renewToken` when the click event is fired, but not more than once every 5 minutes. + * var throttled = _.throttle(renewToken, 300000, { 'trailing': false }); + * jQuery(element).on('click', throttled); + * + * // Cancel the trailing throttled invocation. + * jQuery(window).on('popstate', throttled.cancel); + */ + function throttle(func, wait, options) { + var leading = true, + trailing = true; + + if (typeof func != 'function') { + throw new TypeError(FUNC_ERROR_TEXT); + } + if (isObject(options)) { + leading = 'leading' in options ? !!options.leading : leading; + trailing = 'trailing' in options ? !!options.trailing : trailing; + } + return debounce(func, wait, { + 'leading': leading, + 'maxWait': wait, + 'trailing': trailing + }); + } + + /** + * Creates a function that accepts up to one argument, ignoring any + * additional arguments. + * + * @static + * @memberOf _ + * @since 4.0.0 + * @category Function + * @param {Function} func The function to cap arguments for. + * @returns {Function} Returns the new capped function. + * @example + * + * _.map(['6', '8', '10'], _.unary(parseInt)); + * // => [6, 8, 10] + */ + function unary(func) { + return ary(func, 1); + } + + /** + * Creates a function that provides `value` to `wrapper` as its first + * argument. Any additional arguments provided to the function are appended + * to those provided to the `wrapper`. The wrapper is invoked with the `this` + * binding of the created function. + * + * @static + * @memberOf _ + * @since 0.1.0 + * @category Function + * @param {*} value The value to wrap. + * @param {Function} [wrapper=identity] The wrapper function. + * @returns {Function} Returns the new function. + * @example + * + * var p = _.wrap(_.escape, function(func, text) { + * return '

' + func(text) + '

'; + * }); + * + * p('fred, barney, & pebbles'); + * // => '

fred, barney, & pebbles

' + */ + function wrap(value, wrapper) { + return partial(castFunction(wrapper), value); + } + + /*------------------------------------------------------------------------*/ + + /** + * Casts `value` as an array if it's not one. + * + * @static + * @memberOf _ + * @since 4.4.0 + * @category Lang + * @param {*} value The value to inspect. + * @returns {Array} Returns the cast array. + * @example + * + * _.castArray(1); + * // => [1] + * + * _.castArray({ 'a': 1 }); + * // => [{ 'a': 1 }] + * + * _.castArray('abc'); + * // => ['abc'] + * + * _.castArray(null); + * // => [null] + * + * _.castArray(undefined); + * // => [undefined] + * + * _.castArray(); + * // => [] + * + * var array = [1, 2, 3]; + * console.log(_.castArray(array) === array); + * // => true + */ + function castArray() { + if (!arguments.length) { + return []; + } + var value = arguments[0]; + return isArray(value) ? value : [value]; + } + + /** + * Creates a shallow clone of `value`. + * + * **Note:** This method is loosely based on the + * [structured clone algorithm](https://mdn.io/Structured_clone_algorithm) + * and supports cloning arrays, array buffers, booleans, date objects, maps, + * numbers, `Object` objects, regexes, sets, strings, symbols, and typed + * arrays. The own enumerable properties of `arguments` objects are cloned + * as plain objects. An empty object is returned for uncloneable values such + * as error objects, functions, DOM nodes, and WeakMaps. + * + * @static + * @memberOf _ + * @since 0.1.0 + * @category Lang + * @param {*} value The value to clone. + * @returns {*} Returns the cloned value. + * @see _.cloneDeep + * @example + * + * var objects = [{ 'a': 1 }, { 'b': 2 }]; + * + * var shallow = _.clone(objects); + * console.log(shallow[0] === objects[0]); + * // => true + */ + function clone(value) { + return baseClone(value, CLONE_SYMBOLS_FLAG); + } + + /** + * This method is like `_.clone` except that it accepts `customizer` which + * is invoked to produce the cloned value. If `customizer` returns `undefined`, + * cloning is handled by the method instead. The `customizer` is invoked with + * up to four arguments; (value [, index|key, object, stack]). + * + * @static + * @memberOf _ + * @since 4.0.0 + * @category Lang + * @param {*} value The value to clone. + * @param {Function} [customizer] The function to customize cloning. + * @returns {*} Returns the cloned value. + * @see _.cloneDeepWith + * @example + * + * function customizer(value) { + * if (_.isElement(value)) { + * return value.cloneNode(false); + * } + * } + * + * var el = _.cloneWith(document.body, customizer); + * + * console.log(el === document.body); + * // => false + * console.log(el.nodeName); + * // => 'BODY' + * console.log(el.childNodes.length); + * // => 0 + */ + function cloneWith(value, customizer) { + customizer = typeof customizer == 'function' ? customizer : undefined; + return baseClone(value, CLONE_SYMBOLS_FLAG, customizer); + } + + /** + * This method is like `_.clone` except that it recursively clones `value`. + * + * @static + * @memberOf _ + * @since 1.0.0 + * @category Lang + * @param {*} value The value to recursively clone. + * @returns {*} Returns the deep cloned value. + * @see _.clone + * @example + * + * var objects = [{ 'a': 1 }, { 'b': 2 }]; + * + * var deep = _.cloneDeep(objects); + * console.log(deep[0] === objects[0]); + * // => false + */ + function cloneDeep(value) { + return baseClone(value, CLONE_DEEP_FLAG | CLONE_SYMBOLS_FLAG); + } + + /** + * This method is like `_.cloneWith` except that it recursively clones `value`. + * + * @static + * @memberOf _ + * @since 4.0.0 + * @category Lang + * @param {*} value The value to recursively clone. + * @param {Function} [customizer] The function to customize cloning. + * @returns {*} Returns the deep cloned value. + * @see _.cloneWith + * @example + * + * function customizer(value) { + * if (_.isElement(value)) { + * return value.cloneNode(true); + * } + * } + * + * var el = _.cloneDeepWith(document.body, customizer); + * + * console.log(el === document.body); + * // => false + * console.log(el.nodeName); + * // => 'BODY' + * console.log(el.childNodes.length); + * // => 20 + */ + function cloneDeepWith(value, customizer) { + customizer = typeof customizer == 'function' ? customizer : undefined; + return baseClone(value, CLONE_DEEP_FLAG | CLONE_SYMBOLS_FLAG, customizer); + } + + /** + * Checks if `object` conforms to `source` by invoking the predicate + * properties of `source` with the corresponding property values of `object`. + * + * **Note:** This method is equivalent to `_.conforms` when `source` is + * partially applied. + * + * @static + * @memberOf _ + * @since 4.14.0 + * @category Lang + * @param {Object} object The object to inspect. + * @param {Object} source The object of property predicates to conform to. + * @returns {boolean} Returns `true` if `object` conforms, else `false`. + * @example + * + * var object = { 'a': 1, 'b': 2 }; + * + * _.conformsTo(object, { 'b': function(n) { return n > 1; } }); + * // => true + * + * _.conformsTo(object, { 'b': function(n) { return n > 2; } }); + * // => false + */ + function conformsTo(object, source) { + return source == null || baseConformsTo(object, source, keys(source)); + } + + /** + * Performs a + * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero) + * comparison between two values to determine if they are equivalent. + * + * @static + * @memberOf _ + * @since 4.0.0 + * @category Lang + * @param {*} value The value to compare. + * @param {*} other The other value to compare. + * @returns {boolean} Returns `true` if the values are equivalent, else `false`. + * @example + * + * var object = { 'a': 1 }; + * var other = { 'a': 1 }; + * + * _.eq(object, object); + * // => true + * + * _.eq(object, other); + * // => false + * + * _.eq('a', 'a'); + * // => true + * + * _.eq('a', Object('a')); + * // => false + * + * _.eq(NaN, NaN); + * // => true + */ + function eq(value, other) { + return value === other || (value !== value && other !== other); + } + + /** + * Checks if `value` is greater than `other`. + * + * @static + * @memberOf _ + * @since 3.9.0 + * @category Lang + * @param {*} value The value to compare. + * @param {*} other The other value to compare. + * @returns {boolean} Returns `true` if `value` is greater than `other`, + * else `false`. + * @see _.lt + * @example + * + * _.gt(3, 1); + * // => true + * + * _.gt(3, 3); + * // => false + * + * _.gt(1, 3); + * // => false + */ + var gt = createRelationalOperation(baseGt); + + /** + * Checks if `value` is greater than or equal to `other`. + * + * @static + * @memberOf _ + * @since 3.9.0 + * @category Lang + * @param {*} value The value to compare. + * @param {*} other The other value to compare. + * @returns {boolean} Returns `true` if `value` is greater than or equal to + * `other`, else `false`. + * @see _.lte + * @example + * + * _.gte(3, 1); + * // => true + * + * _.gte(3, 3); + * // => true + * + * _.gte(1, 3); + * // => false + */ + var gte = createRelationalOperation(function(value, other) { + return value >= other; + }); + + /** + * Checks if `value` is likely an `arguments` object. + * + * @static + * @memberOf _ + * @since 0.1.0 + * @category Lang + * @param {*} value The value to check. + * @returns {boolean} Returns `true` if `value` is an `arguments` object, + * else `false`. + * @example + * + * _.isArguments(function() { return arguments; }()); + * // => true + * + * _.isArguments([1, 2, 3]); + * // => false + */ + var isArguments = baseIsArguments(function() { return arguments; }()) ? baseIsArguments : function(value) { + return isObjectLike(value) && hasOwnProperty.call(value, 'callee') && + !propertyIsEnumerable.call(value, 'callee'); + }; + + /** + * Checks if `value` is classified as an `Array` object. + * + * @static + * @memberOf _ + * @since 0.1.0 + * @category Lang + * @param {*} value The value to check. + * @returns {boolean} Returns `true` if `value` is an array, else `false`. + * @example + * + * _.isArray([1, 2, 3]); + * // => true + * + * _.isArray(document.body.children); + * // => false + * + * _.isArray('abc'); + * // => false + * + * _.isArray(_.noop); + * // => false + */ + var isArray = Array.isArray; + + /** + * Checks if `value` is classified as an `ArrayBuffer` object. + * + * @static + * @memberOf _ + * @since 4.3.0 + * @category Lang + * @param {*} value The value to check. + * @returns {boolean} Returns `true` if `value` is an array buffer, else `false`. + * @example + * + * _.isArrayBuffer(new ArrayBuffer(2)); + * // => true + * + * _.isArrayBuffer(new Array(2)); + * // => false + */ + var isArrayBuffer = nodeIsArrayBuffer ? baseUnary(nodeIsArrayBuffer) : baseIsArrayBuffer; + + /** + * Checks if `value` is array-like. A value is considered array-like if it's + * not a function and has a `value.length` that's an integer greater than or + * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`. + * + * @static + * @memberOf _ + * @since 4.0.0 + * @category Lang + * @param {*} value The value to check. + * @returns {boolean} Returns `true` if `value` is array-like, else `false`. + * @example + * + * _.isArrayLike([1, 2, 3]); + * // => true + * + * _.isArrayLike(document.body.children); + * // => true + * + * _.isArrayLike('abc'); + * // => true + * + * _.isArrayLike(_.noop); + * // => false + */ + function isArrayLike(value) { + return value != null && isLength(value.length) && !isFunction(value); + } + + /** + * This method is like `_.isArrayLike` except that it also checks if `value` + * is an object. + * + * @static + * @memberOf _ + * @since 4.0.0 + * @category Lang + * @param {*} value The value to check. + * @returns {boolean} Returns `true` if `value` is an array-like object, + * else `false`. + * @example + * + * _.isArrayLikeObject([1, 2, 3]); + * // => true + * + * _.isArrayLikeObject(document.body.children); + * // => true + * + * _.isArrayLikeObject('abc'); + * // => false + * + * _.isArrayLikeObject(_.noop); + * // => false + */ + function isArrayLikeObject(value) { + return isObjectLike(value) && isArrayLike(value); + } + + /** + * Checks if `value` is classified as a boolean primitive or object. + * + * @static + * @memberOf _ + * @since 0.1.0 + * @category Lang + * @param {*} value The value to check. + * @returns {boolean} Returns `true` if `value` is a boolean, else `false`. + * @example + * + * _.isBoolean(false); + * // => true + * + * _.isBoolean(null); + * // => false + */ + function isBoolean(value) { + return value === true || value === false || + (isObjectLike(value) && baseGetTag(value) == boolTag); + } + + /** + * Checks if `value` is a buffer. + * + * @static + * @memberOf _ + * @since 4.3.0 + * @category Lang + * @param {*} value The value to check. + * @returns {boolean} Returns `true` if `value` is a buffer, else `false`. + * @example + * + * _.isBuffer(new Buffer(2)); + * // => true + * + * _.isBuffer(new Uint8Array(2)); + * // => false + */ + var isBuffer = nativeIsBuffer || stubFalse; + + /** + * Checks if `value` is classified as a `Date` object. + * + * @static + * @memberOf _ + * @since 0.1.0 + * @category Lang + * @param {*} value The value to check. + * @returns {boolean} Returns `true` if `value` is a date object, else `false`. + * @example + * + * _.isDate(new Date); + * // => true + * + * _.isDate('Mon April 23 2012'); + * // => false + */ + var isDate = nodeIsDate ? baseUnary(nodeIsDate) : baseIsDate; + + /** + * Checks if `value` is likely a DOM element. + * + * @static + * @memberOf _ + * @since 0.1.0 + * @category Lang + * @param {*} value The value to check. + * @returns {boolean} Returns `true` if `value` is a DOM element, else `false`. + * @example + * + * _.isElement(document.body); + * // => true + * + * _.isElement(''); + * // => false + */ + function isElement(value) { + return isObjectLike(value) && value.nodeType === 1 && !isPlainObject(value); + } + + /** + * Checks if `value` is an empty object, collection, map, or set. + * + * Objects are considered empty if they have no own enumerable string keyed + * properties. + * + * Array-like values such as `arguments` objects, arrays, buffers, strings, or + * jQuery-like collections are considered empty if they have a `length` of `0`. + * Similarly, maps and sets are considered empty if they have a `size` of `0`. + * + * @static + * @memberOf _ + * @since 0.1.0 + * @category Lang + * @param {*} value The value to check. + * @returns {boolean} Returns `true` if `value` is empty, else `false`. + * @example + * + * _.isEmpty(null); + * // => true + * + * _.isEmpty(true); + * // => true + * + * _.isEmpty(1); + * // => true + * + * _.isEmpty([1, 2, 3]); + * // => false + * + * _.isEmpty({ 'a': 1 }); + * // => false + */ + function isEmpty(value) { + if (value == null) { + return true; + } + if (isArrayLike(value) && + (isArray(value) || typeof value == 'string' || typeof value.splice == 'function' || + isBuffer(value) || isTypedArray(value) || isArguments(value))) { + return !value.length; + } + var tag = getTag(value); + if (tag == mapTag || tag == setTag) { + return !value.size; + } + if (isPrototype(value)) { + return !baseKeys(value).length; + } + for (var key in value) { + if (hasOwnProperty.call(value, key)) { + return false; + } + } + return true; + } + + /** + * Performs a deep comparison between two values to determine if they are + * equivalent. + * + * **Note:** This method supports comparing arrays, array buffers, booleans, + * date objects, error objects, maps, numbers, `Object` objects, regexes, + * sets, strings, symbols, and typed arrays. `Object` objects are compared + * by their own, not inherited, enumerable properties. Functions and DOM + * nodes are compared by strict equality, i.e. `===`. + * + * @static + * @memberOf _ + * @since 0.1.0 + * @category Lang + * @param {*} value The value to compare. + * @param {*} other The other value to compare. + * @returns {boolean} Returns `true` if the values are equivalent, else `false`. + * @example + * + * var object = { 'a': 1 }; + * var other = { 'a': 1 }; + * + * _.isEqual(object, other); + * // => true + * + * object === other; + * // => false + */ + function isEqual(value, other) { + return baseIsEqual(value, other); + } + + /** + * This method is like `_.isEqual` except that it accepts `customizer` which + * is invoked to compare values. If `customizer` returns `undefined`, comparisons + * are handled by the method instead. The `customizer` is invoked with up to + * six arguments: (objValue, othValue [, index|key, object, other, stack]). + * + * @static + * @memberOf _ + * @since 4.0.0 + * @category Lang + * @param {*} value The value to compare. + * @param {*} other The other value to compare. + * @param {Function} [customizer] The function to customize comparisons. + * @returns {boolean} Returns `true` if the values are equivalent, else `false`. + * @example + * + * function isGreeting(value) { + * return /^h(?:i|ello)$/.test(value); + * } + * + * function customizer(objValue, othValue) { + * if (isGreeting(objValue) && isGreeting(othValue)) { + * return true; + * } + * } + * + * var array = ['hello', 'goodbye']; + * var other = ['hi', 'goodbye']; + * + * _.isEqualWith(array, other, customizer); + * // => true + */ + function isEqualWith(value, other, customizer) { + customizer = typeof customizer == 'function' ? customizer : undefined; + var result = customizer ? customizer(value, other) : undefined; + return result === undefined ? baseIsEqual(value, other, undefined, customizer) : !!result; + } + + /** + * Checks if `value` is an `Error`, `EvalError`, `RangeError`, `ReferenceError`, + * `SyntaxError`, `TypeError`, or `URIError` object. + * + * @static + * @memberOf _ + * @since 3.0.0 + * @category Lang + * @param {*} value The value to check. + * @returns {boolean} Returns `true` if `value` is an error object, else `false`. + * @example + * + * _.isError(new Error); + * // => true + * + * _.isError(Error); + * // => false + */ + function isError(value) { + if (!isObjectLike(value)) { + return false; + } + var tag = baseGetTag(value); + return tag == errorTag || tag == domExcTag || + (typeof value.message == 'string' && typeof value.name == 'string' && !isPlainObject(value)); + } + + /** + * Checks if `value` is a finite primitive number. + * + * **Note:** This method is based on + * [`Number.isFinite`](https://mdn.io/Number/isFinite). + * + * @static + * @memberOf _ + * @since 0.1.0 + * @category Lang + * @param {*} value The value to check. + * @returns {boolean} Returns `true` if `value` is a finite number, else `false`. + * @example + * + * _.isFinite(3); + * // => true + * + * _.isFinite(Number.MIN_VALUE); + * // => true + * + * _.isFinite(Infinity); + * // => false + * + * _.isFinite('3'); + * // => false + */ + function isFinite(value) { + return typeof value == 'number' && nativeIsFinite(value); + } + + /** + * Checks if `value` is classified as a `Function` object. + * + * @static + * @memberOf _ + * @since 0.1.0 + * @category Lang + * @param {*} value The value to check. + * @returns {boolean} Returns `true` if `value` is a function, else `false`. + * @example + * + * _.isFunction(_); + * // => true + * + * _.isFunction(/abc/); + * // => false + */ + function isFunction(value) { + if (!isObject(value)) { + return false; + } + // The use of `Object#toString` avoids issues with the `typeof` operator + // in Safari 9 which returns 'object' for typed arrays and other constructors. + var tag = baseGetTag(value); + return tag == funcTag || tag == genTag || tag == asyncTag || tag == proxyTag; + } + + /** + * Checks if `value` is an integer. + * + * **Note:** This method is based on + * [`Number.isInteger`](https://mdn.io/Number/isInteger). + * + * @static + * @memberOf _ + * @since 4.0.0 + * @category Lang + * @param {*} value The value to check. + * @returns {boolean} Returns `true` if `value` is an integer, else `false`. + * @example + * + * _.isInteger(3); + * // => true + * + * _.isInteger(Number.MIN_VALUE); + * // => false + * + * _.isInteger(Infinity); + * // => false + * + * _.isInteger('3'); + * // => false + */ + function isInteger(value) { + return typeof value == 'number' && value == toInteger(value); + } + + /** + * Checks if `value` is a valid array-like length. + * + * **Note:** This method is loosely based on + * [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength). + * + * @static + * @memberOf _ + * @since 4.0.0 + * @category Lang + * @param {*} value The value to check. + * @returns {boolean} Returns `true` if `value` is a valid length, else `false`. + * @example + * + * _.isLength(3); + * // => true + * + * _.isLength(Number.MIN_VALUE); + * // => false + * + * _.isLength(Infinity); + * // => false + * + * _.isLength('3'); + * // => false + */ + function isLength(value) { + return typeof value == 'number' && + value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER; + } + + /** + * Checks if `value` is the + * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types) + * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`) + * + * @static + * @memberOf _ + * @since 0.1.0 + * @category Lang + * @param {*} value The value to check. + * @returns {boolean} Returns `true` if `value` is an object, else `false`. + * @example + * + * _.isObject({}); + * // => true + * + * _.isObject([1, 2, 3]); + * // => true + * + * _.isObject(_.noop); + * // => true + * + * _.isObject(null); + * // => false + */ + function isObject(value) { + var type = typeof value; + return value != null && (type == 'object' || type == 'function'); + } + + /** + * Checks if `value` is object-like. A value is object-like if it's not `null` + * and has a `typeof` result of "object". + * + * @static + * @memberOf _ + * @since 4.0.0 + * @category Lang + * @param {*} value The value to check. + * @returns {boolean} Returns `true` if `value` is object-like, else `false`. + * @example + * + * _.isObjectLike({}); + * // => true + * + * _.isObjectLike([1, 2, 3]); + * // => true + * + * _.isObjectLike(_.noop); + * // => false + * + * _.isObjectLike(null); + * // => false + */ + function isObjectLike(value) { + return value != null && typeof value == 'object'; + } + + /** + * Checks if `value` is classified as a `Map` object. + * + * @static + * @memberOf _ + * @since 4.3.0 + * @category Lang + * @param {*} value The value to check. + * @returns {boolean} Returns `true` if `value` is a map, else `false`. + * @example + * + * _.isMap(new Map); + * // => true + * + * _.isMap(new WeakMap); + * // => false + */ + var isMap = nodeIsMap ? baseUnary(nodeIsMap) : baseIsMap; + + /** + * Performs a partial deep comparison between `object` and `source` to + * determine if `object` contains equivalent property values. + * + * **Note:** This method is equivalent to `_.matches` when `source` is + * partially applied. + * + * Partial comparisons will match empty array and empty object `source` + * values against any array or object value, respectively. See `_.isEqual` + * for a list of supported value comparisons. + * + * @static + * @memberOf _ + * @since 3.0.0 + * @category Lang + * @param {Object} object The object to inspect. + * @param {Object} source The object of property values to match. + * @returns {boolean} Returns `true` if `object` is a match, else `false`. + * @example + * + * var object = { 'a': 1, 'b': 2 }; + * + * _.isMatch(object, { 'b': 2 }); + * // => true + * + * _.isMatch(object, { 'b': 1 }); + * // => false + */ + function isMatch(object, source) { + return object === source || baseIsMatch(object, source, getMatchData(source)); + } + + /** + * This method is like `_.isMatch` except that it accepts `customizer` which + * is invoked to compare values. If `customizer` returns `undefined`, comparisons + * are handled by the method instead. The `customizer` is invoked with five + * arguments: (objValue, srcValue, index|key, object, source). + * + * @static + * @memberOf _ + * @since 4.0.0 + * @category Lang + * @param {Object} object The object to inspect. + * @param {Object} source The object of property values to match. + * @param {Function} [customizer] The function to customize comparisons. + * @returns {boolean} Returns `true` if `object` is a match, else `false`. + * @example + * + * function isGreeting(value) { + * return /^h(?:i|ello)$/.test(value); + * } + * + * function customizer(objValue, srcValue) { + * if (isGreeting(objValue) && isGreeting(srcValue)) { + * return true; + * } + * } + * + * var object = { 'greeting': 'hello' }; + * var source = { 'greeting': 'hi' }; + * + * _.isMatchWith(object, source, customizer); + * // => true + */ + function isMatchWith(object, source, customizer) { + customizer = typeof customizer == 'function' ? customizer : undefined; + return baseIsMatch(object, source, getMatchData(source), customizer); + } + + /** + * Checks if `value` is `NaN`. + * + * **Note:** This method is based on + * [`Number.isNaN`](https://mdn.io/Number/isNaN) and is not the same as + * global [`isNaN`](https://mdn.io/isNaN) which returns `true` for + * `undefined` and other non-number values. + * + * @static + * @memberOf _ + * @since 0.1.0 + * @category Lang + * @param {*} value The value to check. + * @returns {boolean} Returns `true` if `value` is `NaN`, else `false`. + * @example + * + * _.isNaN(NaN); + * // => true + * + * _.isNaN(new Number(NaN)); + * // => true + * + * isNaN(undefined); + * // => true + * + * _.isNaN(undefined); + * // => false + */ + function isNaN(value) { + // An `NaN` primitive is the only value that is not equal to itself. + // Perform the `toStringTag` check first to avoid errors with some + // ActiveX objects in IE. + return isNumber(value) && value != +value; + } + + /** + * Checks if `value` is a pristine native function. + * + * **Note:** This method can't reliably detect native functions in the presence + * of the core-js package because core-js circumvents this kind of detection. + * Despite multiple requests, the core-js maintainer has made it clear: any + * attempt to fix the detection will be obstructed. As a result, we're left + * with little choice but to throw an error. Unfortunately, this also affects + * packages, like [babel-polyfill](https://www.npmjs.com/package/babel-polyfill), + * which rely on core-js. + * + * @static + * @memberOf _ + * @since 3.0.0 + * @category Lang + * @param {*} value The value to check. + * @returns {boolean} Returns `true` if `value` is a native function, + * else `false`. + * @example + * + * _.isNative(Array.prototype.push); + * // => true + * + * _.isNative(_); + * // => false + */ + function isNative(value) { + if (isMaskable(value)) { + throw new Error(CORE_ERROR_TEXT); + } + return baseIsNative(value); + } + + /** + * Checks if `value` is `null`. + * + * @static + * @memberOf _ + * @since 0.1.0 + * @category Lang + * @param {*} value The value to check. + * @returns {boolean} Returns `true` if `value` is `null`, else `false`. + * @example + * + * _.isNull(null); + * // => true + * + * _.isNull(void 0); + * // => false + */ + function isNull(value) { + return value === null; + } + + /** + * Checks if `value` is `null` or `undefined`. + * + * @static + * @memberOf _ + * @since 4.0.0 + * @category Lang + * @param {*} value The value to check. + * @returns {boolean} Returns `true` if `value` is nullish, else `false`. + * @example + * + * _.isNil(null); + * // => true + * + * _.isNil(void 0); + * // => true + * + * _.isNil(NaN); + * // => false + */ + function isNil(value) { + return value == null; + } + + /** + * Checks if `value` is classified as a `Number` primitive or object. + * + * **Note:** To exclude `Infinity`, `-Infinity`, and `NaN`, which are + * classified as numbers, use the `_.isFinite` method. + * + * @static + * @memberOf _ + * @since 0.1.0 + * @category Lang + * @param {*} value The value to check. + * @returns {boolean} Returns `true` if `value` is a number, else `false`. + * @example + * + * _.isNumber(3); + * // => true + * + * _.isNumber(Number.MIN_VALUE); + * // => true + * + * _.isNumber(Infinity); + * // => true + * + * _.isNumber('3'); + * // => false + */ + function isNumber(value) { + return typeof value == 'number' || + (isObjectLike(value) && baseGetTag(value) == numberTag); + } + + /** + * Checks if `value` is a plain object, that is, an object created by the + * `Object` constructor or one with a `[[Prototype]]` of `null`. + * + * @static + * @memberOf _ + * @since 0.8.0 + * @category Lang + * @param {*} value The value to check. + * @returns {boolean} Returns `true` if `value` is a plain object, else `false`. + * @example + * + * function Foo() { + * this.a = 1; + * } + * + * _.isPlainObject(new Foo); + * // => false + * + * _.isPlainObject([1, 2, 3]); + * // => false + * + * _.isPlainObject({ 'x': 0, 'y': 0 }); + * // => true + * + * _.isPlainObject(Object.create(null)); + * // => true + */ + function isPlainObject(value) { + if (!isObjectLike(value) || baseGetTag(value) != objectTag) { + return false; + } + var proto = getPrototype(value); + if (proto === null) { + return true; + } + var Ctor = hasOwnProperty.call(proto, 'constructor') && proto.constructor; + return typeof Ctor == 'function' && Ctor instanceof Ctor && + funcToString.call(Ctor) == objectCtorString; + } + + /** + * Checks if `value` is classified as a `RegExp` object. + * + * @static + * @memberOf _ + * @since 0.1.0 + * @category Lang + * @param {*} value The value to check. + * @returns {boolean} Returns `true` if `value` is a regexp, else `false`. + * @example + * + * _.isRegExp(/abc/); + * // => true + * + * _.isRegExp('/abc/'); + * // => false + */ + var isRegExp = nodeIsRegExp ? baseUnary(nodeIsRegExp) : baseIsRegExp; + + /** + * Checks if `value` is a safe integer. An integer is safe if it's an IEEE-754 + * double precision number which isn't the result of a rounded unsafe integer. + * + * **Note:** This method is based on + * [`Number.isSafeInteger`](https://mdn.io/Number/isSafeInteger). + * + * @static + * @memberOf _ + * @since 4.0.0 + * @category Lang + * @param {*} value The value to check. + * @returns {boolean} Returns `true` if `value` is a safe integer, else `false`. + * @example + * + * _.isSafeInteger(3); + * // => true + * + * _.isSafeInteger(Number.MIN_VALUE); + * // => false + * + * _.isSafeInteger(Infinity); + * // => false + * + * _.isSafeInteger('3'); + * // => false + */ + function isSafeInteger(value) { + return isInteger(value) && value >= -MAX_SAFE_INTEGER && value <= MAX_SAFE_INTEGER; + } + + /** + * Checks if `value` is classified as a `Set` object. + * + * @static + * @memberOf _ + * @since 4.3.0 + * @category Lang + * @param {*} value The value to check. + * @returns {boolean} Returns `true` if `value` is a set, else `false`. + * @example + * + * _.isSet(new Set); + * // => true + * + * _.isSet(new WeakSet); + * // => false + */ + var isSet = nodeIsSet ? baseUnary(nodeIsSet) : baseIsSet; + + /** + * Checks if `value` is classified as a `String` primitive or object. + * + * @static + * @since 0.1.0 + * @memberOf _ + * @category Lang + * @param {*} value The value to check. + * @returns {boolean} Returns `true` if `value` is a string, else `false`. + * @example + * + * _.isString('abc'); + * // => true + * + * _.isString(1); + * // => false + */ + function isString(value) { + return typeof value == 'string' || + (!isArray(value) && isObjectLike(value) && baseGetTag(value) == stringTag); + } + + /** + * Checks if `value` is classified as a `Symbol` primitive or object. + * + * @static + * @memberOf _ + * @since 4.0.0 + * @category Lang + * @param {*} value The value to check. + * @returns {boolean} Returns `true` if `value` is a symbol, else `false`. + * @example + * + * _.isSymbol(Symbol.iterator); + * // => true + * + * _.isSymbol('abc'); + * // => false + */ + function isSymbol(value) { + return typeof value == 'symbol' || + (isObjectLike(value) && baseGetTag(value) == symbolTag); + } + + /** + * Checks if `value` is classified as a typed array. + * + * @static + * @memberOf _ + * @since 3.0.0 + * @category Lang + * @param {*} value The value to check. + * @returns {boolean} Returns `true` if `value` is a typed array, else `false`. + * @example + * + * _.isTypedArray(new Uint8Array); + * // => true + * + * _.isTypedArray([]); + * // => false + */ + var isTypedArray = nodeIsTypedArray ? baseUnary(nodeIsTypedArray) : baseIsTypedArray; + + /** + * Checks if `value` is `undefined`. + * + * @static + * @since 0.1.0 + * @memberOf _ + * @category Lang + * @param {*} value The value to check. + * @returns {boolean} Returns `true` if `value` is `undefined`, else `false`. + * @example + * + * _.isUndefined(void 0); + * // => true + * + * _.isUndefined(null); + * // => false + */ + function isUndefined(value) { + return value === undefined; + } + + /** + * Checks if `value` is classified as a `WeakMap` object. + * + * @static + * @memberOf _ + * @since 4.3.0 + * @category Lang + * @param {*} value The value to check. + * @returns {boolean} Returns `true` if `value` is a weak map, else `false`. + * @example + * + * _.isWeakMap(new WeakMap); + * // => true + * + * _.isWeakMap(new Map); + * // => false + */ + function isWeakMap(value) { + return isObjectLike(value) && getTag(value) == weakMapTag; + } + + /** + * Checks if `value` is classified as a `WeakSet` object. + * + * @static + * @memberOf _ + * @since 4.3.0 + * @category Lang + * @param {*} value The value to check. + * @returns {boolean} Returns `true` if `value` is a weak set, else `false`. + * @example + * + * _.isWeakSet(new WeakSet); + * // => true + * + * _.isWeakSet(new Set); + * // => false + */ + function isWeakSet(value) { + return isObjectLike(value) && baseGetTag(value) == weakSetTag; + } + + /** + * Checks if `value` is less than `other`. + * + * @static + * @memberOf _ + * @since 3.9.0 + * @category Lang + * @param {*} value The value to compare. + * @param {*} other The other value to compare. + * @returns {boolean} Returns `true` if `value` is less than `other`, + * else `false`. + * @see _.gt + * @example + * + * _.lt(1, 3); + * // => true + * + * _.lt(3, 3); + * // => false + * + * _.lt(3, 1); + * // => false + */ + var lt = createRelationalOperation(baseLt); + + /** + * Checks if `value` is less than or equal to `other`. + * + * @static + * @memberOf _ + * @since 3.9.0 + * @category Lang + * @param {*} value The value to compare. + * @param {*} other The other value to compare. + * @returns {boolean} Returns `true` if `value` is less than or equal to + * `other`, else `false`. + * @see _.gte + * @example + * + * _.lte(1, 3); + * // => true + * + * _.lte(3, 3); + * // => true + * + * _.lte(3, 1); + * // => false + */ + var lte = createRelationalOperation(function(value, other) { + return value <= other; + }); + + /** + * Converts `value` to an array. + * + * @static + * @since 0.1.0 + * @memberOf _ + * @category Lang + * @param {*} value The value to convert. + * @returns {Array} Returns the converted array. + * @example + * + * _.toArray({ 'a': 1, 'b': 2 }); + * // => [1, 2] + * + * _.toArray('abc'); + * // => ['a', 'b', 'c'] + * + * _.toArray(1); + * // => [] + * + * _.toArray(null); + * // => [] + */ + function toArray(value) { + if (!value) { + return []; + } + if (isArrayLike(value)) { + return isString(value) ? stringToArray(value) : copyArray(value); + } + if (symIterator && value[symIterator]) { + return iteratorToArray(value[symIterator]()); + } + var tag = getTag(value), + func = tag == mapTag ? mapToArray : (tag == setTag ? setToArray : values); + + return func(value); + } + + /** + * Converts `value` to a finite number. + * + * @static + * @memberOf _ + * @since 4.12.0 + * @category Lang + * @param {*} value The value to convert. + * @returns {number} Returns the converted number. + * @example + * + * _.toFinite(3.2); + * // => 3.2 + * + * _.toFinite(Number.MIN_VALUE); + * // => 5e-324 + * + * _.toFinite(Infinity); + * // => 1.7976931348623157e+308 + * + * _.toFinite('3.2'); + * // => 3.2 + */ + function toFinite(value) { + if (!value) { + return value === 0 ? value : 0; + } + value = toNumber(value); + if (value === INFINITY || value === -INFINITY) { + var sign = (value < 0 ? -1 : 1); + return sign * MAX_INTEGER; + } + return value === value ? value : 0; + } + + /** + * Converts `value` to an integer. + * + * **Note:** This method is loosely based on + * [`ToInteger`](http://www.ecma-international.org/ecma-262/7.0/#sec-tointeger). + * + * @static + * @memberOf _ + * @since 4.0.0 + * @category Lang + * @param {*} value The value to convert. + * @returns {number} Returns the converted integer. + * @example + * + * _.toInteger(3.2); + * // => 3 + * + * _.toInteger(Number.MIN_VALUE); + * // => 0 + * + * _.toInteger(Infinity); + * // => 1.7976931348623157e+308 + * + * _.toInteger('3.2'); + * // => 3 + */ + function toInteger(value) { + var result = toFinite(value), + remainder = result % 1; + + return result === result ? (remainder ? result - remainder : result) : 0; + } + + /** + * Converts `value` to an integer suitable for use as the length of an + * array-like object. + * + * **Note:** This method is based on + * [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength). + * + * @static + * @memberOf _ + * @since 4.0.0 + * @category Lang + * @param {*} value The value to convert. + * @returns {number} Returns the converted integer. + * @example + * + * _.toLength(3.2); + * // => 3 + * + * _.toLength(Number.MIN_VALUE); + * // => 0 + * + * _.toLength(Infinity); + * // => 4294967295 + * + * _.toLength('3.2'); + * // => 3 + */ + function toLength(value) { + return value ? baseClamp(toInteger(value), 0, MAX_ARRAY_LENGTH) : 0; + } + + /** + * Converts `value` to a number. + * + * @static + * @memberOf _ + * @since 4.0.0 + * @category Lang + * @param {*} value The value to process. + * @returns {number} Returns the number. + * @example + * + * _.toNumber(3.2); + * // => 3.2 + * + * _.toNumber(Number.MIN_VALUE); + * // => 5e-324 + * + * _.toNumber(Infinity); + * // => Infinity + * + * _.toNumber('3.2'); + * // => 3.2 + */ + function toNumber(value) { + if (typeof value == 'number') { + return value; + } + if (isSymbol(value)) { + return NAN; + } + if (isObject(value)) { + var other = typeof value.valueOf == 'function' ? value.valueOf() : value; + value = isObject(other) ? (other + '') : other; + } + if (typeof value != 'string') { + return value === 0 ? value : +value; + } + value = value.replace(reTrim, ''); + var isBinary = reIsBinary.test(value); + return (isBinary || reIsOctal.test(value)) + ? freeParseInt(value.slice(2), isBinary ? 2 : 8) + : (reIsBadHex.test(value) ? NAN : +value); + } + + /** + * Converts `value` to a plain object flattening inherited enumerable string + * keyed properties of `value` to own properties of the plain object. + * + * @static + * @memberOf _ + * @since 3.0.0 + * @category Lang + * @param {*} value The value to convert. + * @returns {Object} Returns the converted plain object. + * @example + * + * function Foo() { + * this.b = 2; + * } + * + * Foo.prototype.c = 3; + * + * _.assign({ 'a': 1 }, new Foo); + * // => { 'a': 1, 'b': 2 } + * + * _.assign({ 'a': 1 }, _.toPlainObject(new Foo)); + * // => { 'a': 1, 'b': 2, 'c': 3 } + */ + function toPlainObject(value) { + return copyObject(value, keysIn(value)); + } + + /** + * Converts `value` to a safe integer. A safe integer can be compared and + * represented correctly. + * + * @static + * @memberOf _ + * @since 4.0.0 + * @category Lang + * @param {*} value The value to convert. + * @returns {number} Returns the converted integer. + * @example + * + * _.toSafeInteger(3.2); + * // => 3 + * + * _.toSafeInteger(Number.MIN_VALUE); + * // => 0 + * + * _.toSafeInteger(Infinity); + * // => 9007199254740991 + * + * _.toSafeInteger('3.2'); + * // => 3 + */ + function toSafeInteger(value) { + return value + ? baseClamp(toInteger(value), -MAX_SAFE_INTEGER, MAX_SAFE_INTEGER) + : (value === 0 ? value : 0); + } + + /** + * Converts `value` to a string. An empty string is returned for `null` + * and `undefined` values. The sign of `-0` is preserved. + * + * @static + * @memberOf _ + * @since 4.0.0 + * @category Lang + * @param {*} value The value to convert. + * @returns {string} Returns the converted string. + * @example + * + * _.toString(null); + * // => '' + * + * _.toString(-0); + * // => '-0' + * + * _.toString([1, 2, 3]); + * // => '1,2,3' + */ + function toString(value) { + return value == null ? '' : baseToString(value); + } + + /*------------------------------------------------------------------------*/ + + /** + * Assigns own enumerable string keyed properties of source objects to the + * destination object. Source objects are applied from left to right. + * Subsequent sources overwrite property assignments of previous sources. + * + * **Note:** This method mutates `object` and is loosely based on + * [`Object.assign`](https://mdn.io/Object/assign). + * + * @static + * @memberOf _ + * @since 0.10.0 + * @category Object + * @param {Object} object The destination object. + * @param {...Object} [sources] The source objects. + * @returns {Object} Returns `object`. + * @see _.assignIn + * @example + * + * function Foo() { + * this.a = 1; + * } + * + * function Bar() { + * this.c = 3; + * } + * + * Foo.prototype.b = 2; + * Bar.prototype.d = 4; + * + * _.assign({ 'a': 0 }, new Foo, new Bar); + * // => { 'a': 1, 'c': 3 } + */ + var assign = createAssigner(function(object, source) { + if (isPrototype(source) || isArrayLike(source)) { + copyObject(source, keys(source), object); + return; + } + for (var key in source) { + if (hasOwnProperty.call(source, key)) { + assignValue(object, key, source[key]); + } + } + }); + + /** + * This method is like `_.assign` except that it iterates over own and + * inherited source properties. + * + * **Note:** This method mutates `object`. + * + * @static + * @memberOf _ + * @since 4.0.0 + * @alias extend + * @category Object + * @param {Object} object The destination object. + * @param {...Object} [sources] The source objects. + * @returns {Object} Returns `object`. + * @see _.assign + * @example + * + * function Foo() { + * this.a = 1; + * } + * + * function Bar() { + * this.c = 3; + * } + * + * Foo.prototype.b = 2; + * Bar.prototype.d = 4; + * + * _.assignIn({ 'a': 0 }, new Foo, new Bar); + * // => { 'a': 1, 'b': 2, 'c': 3, 'd': 4 } + */ + var assignIn = createAssigner(function(object, source) { + copyObject(source, keysIn(source), object); + }); + + /** + * This method is like `_.assignIn` except that it accepts `customizer` + * which is invoked to produce the assigned values. If `customizer` returns + * `undefined`, assignment is handled by the method instead. The `customizer` + * is invoked with five arguments: (objValue, srcValue, key, object, source). + * + * **Note:** This method mutates `object`. + * + * @static + * @memberOf _ + * @since 4.0.0 + * @alias extendWith + * @category Object + * @param {Object} object The destination object. + * @param {...Object} sources The source objects. + * @param {Function} [customizer] The function to customize assigned values. + * @returns {Object} Returns `object`. + * @see _.assignWith + * @example + * + * function customizer(objValue, srcValue) { + * return _.isUndefined(objValue) ? srcValue : objValue; + * } + * + * var defaults = _.partialRight(_.assignInWith, customizer); + * + * defaults({ 'a': 1 }, { 'b': 2 }, { 'a': 3 }); + * // => { 'a': 1, 'b': 2 } + */ + var assignInWith = createAssigner(function(object, source, srcIndex, customizer) { + copyObject(source, keysIn(source), object, customizer); + }); + + /** + * This method is like `_.assign` except that it accepts `customizer` + * which is invoked to produce the assigned values. If `customizer` returns + * `undefined`, assignment is handled by the method instead. The `customizer` + * is invoked with five arguments: (objValue, srcValue, key, object, source). + * + * **Note:** This method mutates `object`. + * + * @static + * @memberOf _ + * @since 4.0.0 + * @category Object + * @param {Object} object The destination object. + * @param {...Object} sources The source objects. + * @param {Function} [customizer] The function to customize assigned values. + * @returns {Object} Returns `object`. + * @see _.assignInWith + * @example + * + * function customizer(objValue, srcValue) { + * return _.isUndefined(objValue) ? srcValue : objValue; + * } + * + * var defaults = _.partialRight(_.assignWith, customizer); + * + * defaults({ 'a': 1 }, { 'b': 2 }, { 'a': 3 }); + * // => { 'a': 1, 'b': 2 } + */ + var assignWith = createAssigner(function(object, source, srcIndex, customizer) { + copyObject(source, keys(source), object, customizer); + }); + + /** + * Creates an array of values corresponding to `paths` of `object`. + * + * @static + * @memberOf _ + * @since 1.0.0 + * @category Object + * @param {Object} object The object to iterate over. + * @param {...(string|string[])} [paths] The property paths to pick. + * @returns {Array} Returns the picked values. + * @example + * + * var object = { 'a': [{ 'b': { 'c': 3 } }, 4] }; + * + * _.at(object, ['a[0].b.c', 'a[1]']); + * // => [3, 4] + */ + var at = flatRest(baseAt); + + /** + * Creates an object that inherits from the `prototype` object. If a + * `properties` object is given, its own enumerable string keyed properties + * are assigned to the created object. + * + * @static + * @memberOf _ + * @since 2.3.0 + * @category Object + * @param {Object} prototype The object to inherit from. + * @param {Object} [properties] The properties to assign to the object. + * @returns {Object} Returns the new object. + * @example + * + * function Shape() { + * this.x = 0; + * this.y = 0; + * } + * + * function Circle() { + * Shape.call(this); + * } + * + * Circle.prototype = _.create(Shape.prototype, { + * 'constructor': Circle + * }); + * + * var circle = new Circle; + * circle instanceof Circle; + * // => true + * + * circle instanceof Shape; + * // => true + */ + function create(prototype, properties) { + var result = baseCreate(prototype); + return properties == null ? result : baseAssign(result, properties); + } + + /** + * Assigns own and inherited enumerable string keyed properties of source + * objects to the destination object for all destination properties that + * resolve to `undefined`. Source objects are applied from left to right. + * Once a property is set, additional values of the same property are ignored. + * + * **Note:** This method mutates `object`. + * + * @static + * @since 0.1.0 + * @memberOf _ + * @category Object + * @param {Object} object The destination object. + * @param {...Object} [sources] The source objects. + * @returns {Object} Returns `object`. + * @see _.defaultsDeep + * @example + * + * _.defaults({ 'a': 1 }, { 'b': 2 }, { 'a': 3 }); + * // => { 'a': 1, 'b': 2 } + */ + var defaults = baseRest(function(object, sources) { + object = Object(object); + + var index = -1; + var length = sources.length; + var guard = length > 2 ? sources[2] : undefined; + + if (guard && isIterateeCall(sources[0], sources[1], guard)) { + length = 1; + } + + while (++index < length) { + var source = sources[index]; + var props = keysIn(source); + var propsIndex = -1; + var propsLength = props.length; + + while (++propsIndex < propsLength) { + var key = props[propsIndex]; + var value = object[key]; + + if (value === undefined || + (eq(value, objectProto[key]) && !hasOwnProperty.call(object, key))) { + object[key] = source[key]; + } + } + } + + return object; + }); + + /** + * This method is like `_.defaults` except that it recursively assigns + * default properties. + * + * **Note:** This method mutates `object`. + * + * @static + * @memberOf _ + * @since 3.10.0 + * @category Object + * @param {Object} object The destination object. + * @param {...Object} [sources] The source objects. + * @returns {Object} Returns `object`. + * @see _.defaults + * @example + * + * _.defaultsDeep({ 'a': { 'b': 2 } }, { 'a': { 'b': 1, 'c': 3 } }); + * // => { 'a': { 'b': 2, 'c': 3 } } + */ + var defaultsDeep = baseRest(function(args) { + args.push(undefined, customDefaultsMerge); + return apply(mergeWith, undefined, args); + }); + + /** + * This method is like `_.find` except that it returns the key of the first + * element `predicate` returns truthy for instead of the element itself. + * + * @static + * @memberOf _ + * @since 1.1.0 + * @category Object + * @param {Object} object The object to inspect. + * @param {Function} [predicate=_.identity] The function invoked per iteration. + * @returns {string|undefined} Returns the key of the matched element, + * else `undefined`. + * @example + * + * var users = { + * 'barney': { 'age': 36, 'active': true }, + * 'fred': { 'age': 40, 'active': false }, + * 'pebbles': { 'age': 1, 'active': true } + * }; + * + * _.findKey(users, function(o) { return o.age < 40; }); + * // => 'barney' (iteration order is not guaranteed) + * + * // The `_.matches` iteratee shorthand. + * _.findKey(users, { 'age': 1, 'active': true }); + * // => 'pebbles' + * + * // The `_.matchesProperty` iteratee shorthand. + * _.findKey(users, ['active', false]); + * // => 'fred' + * + * // The `_.property` iteratee shorthand. + * _.findKey(users, 'active'); + * // => 'barney' + */ + function findKey(object, predicate) { + return baseFindKey(object, getIteratee(predicate, 3), baseForOwn); + } + + /** + * This method is like `_.findKey` except that it iterates over elements of + * a collection in the opposite order. + * + * @static + * @memberOf _ + * @since 2.0.0 + * @category Object + * @param {Object} object The object to inspect. + * @param {Function} [predicate=_.identity] The function invoked per iteration. + * @returns {string|undefined} Returns the key of the matched element, + * else `undefined`. + * @example + * + * var users = { + * 'barney': { 'age': 36, 'active': true }, + * 'fred': { 'age': 40, 'active': false }, + * 'pebbles': { 'age': 1, 'active': true } + * }; + * + * _.findLastKey(users, function(o) { return o.age < 40; }); + * // => returns 'pebbles' assuming `_.findKey` returns 'barney' + * + * // The `_.matches` iteratee shorthand. + * _.findLastKey(users, { 'age': 36, 'active': true }); + * // => 'barney' + * + * // The `_.matchesProperty` iteratee shorthand. + * _.findLastKey(users, ['active', false]); + * // => 'fred' + * + * // The `_.property` iteratee shorthand. + * _.findLastKey(users, 'active'); + * // => 'pebbles' + */ + function findLastKey(object, predicate) { + return baseFindKey(object, getIteratee(predicate, 3), baseForOwnRight); + } + + /** + * Iterates over own and inherited enumerable string keyed properties of an + * object and invokes `iteratee` for each property. The iteratee is invoked + * with three arguments: (value, key, object). Iteratee functions may exit + * iteration early by explicitly returning `false`. + * + * @static + * @memberOf _ + * @since 0.3.0 + * @category Object + * @param {Object} object The object to iterate over. + * @param {Function} [iteratee=_.identity] The function invoked per iteration. + * @returns {Object} Returns `object`. + * @see _.forInRight + * @example + * + * function Foo() { + * this.a = 1; + * this.b = 2; + * } + * + * Foo.prototype.c = 3; + * + * _.forIn(new Foo, function(value, key) { + * console.log(key); + * }); + * // => Logs 'a', 'b', then 'c' (iteration order is not guaranteed). + */ + function forIn(object, iteratee) { + return object == null + ? object + : baseFor(object, getIteratee(iteratee, 3), keysIn); + } + + /** + * This method is like `_.forIn` except that it iterates over properties of + * `object` in the opposite order. + * + * @static + * @memberOf _ + * @since 2.0.0 + * @category Object + * @param {Object} object The object to iterate over. + * @param {Function} [iteratee=_.identity] The function invoked per iteration. + * @returns {Object} Returns `object`. + * @see _.forIn + * @example + * + * function Foo() { + * this.a = 1; + * this.b = 2; + * } + * + * Foo.prototype.c = 3; + * + * _.forInRight(new Foo, function(value, key) { + * console.log(key); + * }); + * // => Logs 'c', 'b', then 'a' assuming `_.forIn` logs 'a', 'b', then 'c'. + */ + function forInRight(object, iteratee) { + return object == null + ? object + : baseForRight(object, getIteratee(iteratee, 3), keysIn); + } + + /** + * Iterates over own enumerable string keyed properties of an object and + * invokes `iteratee` for each property. The iteratee is invoked with three + * arguments: (value, key, object). Iteratee functions may exit iteration + * early by explicitly returning `false`. + * + * @static + * @memberOf _ + * @since 0.3.0 + * @category Object + * @param {Object} object The object to iterate over. + * @param {Function} [iteratee=_.identity] The function invoked per iteration. + * @returns {Object} Returns `object`. + * @see _.forOwnRight + * @example + * + * function Foo() { + * this.a = 1; + * this.b = 2; + * } + * + * Foo.prototype.c = 3; + * + * _.forOwn(new Foo, function(value, key) { + * console.log(key); + * }); + * // => Logs 'a' then 'b' (iteration order is not guaranteed). + */ + function forOwn(object, iteratee) { + return object && baseForOwn(object, getIteratee(iteratee, 3)); + } + + /** + * This method is like `_.forOwn` except that it iterates over properties of + * `object` in the opposite order. + * + * @static + * @memberOf _ + * @since 2.0.0 + * @category Object + * @param {Object} object The object to iterate over. + * @param {Function} [iteratee=_.identity] The function invoked per iteration. + * @returns {Object} Returns `object`. + * @see _.forOwn + * @example + * + * function Foo() { + * this.a = 1; + * this.b = 2; + * } + * + * Foo.prototype.c = 3; + * + * _.forOwnRight(new Foo, function(value, key) { + * console.log(key); + * }); + * // => Logs 'b' then 'a' assuming `_.forOwn` logs 'a' then 'b'. + */ + function forOwnRight(object, iteratee) { + return object && baseForOwnRight(object, getIteratee(iteratee, 3)); + } + + /** + * Creates an array of function property names from own enumerable properties + * of `object`. + * + * @static + * @since 0.1.0 + * @memberOf _ + * @category Object + * @param {Object} object The object to inspect. + * @returns {Array} Returns the function names. + * @see _.functionsIn + * @example + * + * function Foo() { + * this.a = _.constant('a'); + * this.b = _.constant('b'); + * } + * + * Foo.prototype.c = _.constant('c'); + * + * _.functions(new Foo); + * // => ['a', 'b'] + */ + function functions(object) { + return object == null ? [] : baseFunctions(object, keys(object)); + } + + /** + * Creates an array of function property names from own and inherited + * enumerable properties of `object`. + * + * @static + * @memberOf _ + * @since 4.0.0 + * @category Object + * @param {Object} object The object to inspect. + * @returns {Array} Returns the function names. + * @see _.functions + * @example + * + * function Foo() { + * this.a = _.constant('a'); + * this.b = _.constant('b'); + * } + * + * Foo.prototype.c = _.constant('c'); + * + * _.functionsIn(new Foo); + * // => ['a', 'b', 'c'] + */ + function functionsIn(object) { + return object == null ? [] : baseFunctions(object, keysIn(object)); + } + + /** + * Gets the value at `path` of `object`. If the resolved value is + * `undefined`, the `defaultValue` is returned in its place. + * + * @static + * @memberOf _ + * @since 3.7.0 + * @category Object + * @param {Object} object The object to query. + * @param {Array|string} path The path of the property to get. + * @param {*} [defaultValue] The value returned for `undefined` resolved values. + * @returns {*} Returns the resolved value. + * @example + * + * var object = { 'a': [{ 'b': { 'c': 3 } }] }; + * + * _.get(object, 'a[0].b.c'); + * // => 3 + * + * _.get(object, ['a', '0', 'b', 'c']); + * // => 3 + * + * _.get(object, 'a.b.c', 'default'); + * // => 'default' + */ + function get(object, path, defaultValue) { + var result = object == null ? undefined : baseGet(object, path); + return result === undefined ? defaultValue : result; + } + + /** + * Checks if `path` is a direct property of `object`. + * + * @static + * @since 0.1.0 + * @memberOf _ + * @category Object + * @param {Object} object The object to query. + * @param {Array|string} path The path to check. + * @returns {boolean} Returns `true` if `path` exists, else `false`. + * @example + * + * var object = { 'a': { 'b': 2 } }; + * var other = _.create({ 'a': _.create({ 'b': 2 }) }); + * + * _.has(object, 'a'); + * // => true + * + * _.has(object, 'a.b'); + * // => true + * + * _.has(object, ['a', 'b']); + * // => true + * + * _.has(other, 'a'); + * // => false + */ + function has(object, path) { + return object != null && hasPath(object, path, baseHas); + } + + /** + * Checks if `path` is a direct or inherited property of `object`. + * + * @static + * @memberOf _ + * @since 4.0.0 + * @category Object + * @param {Object} object The object to query. + * @param {Array|string} path The path to check. + * @returns {boolean} Returns `true` if `path` exists, else `false`. + * @example + * + * var object = _.create({ 'a': _.create({ 'b': 2 }) }); + * + * _.hasIn(object, 'a'); + * // => true + * + * _.hasIn(object, 'a.b'); + * // => true + * + * _.hasIn(object, ['a', 'b']); + * // => true + * + * _.hasIn(object, 'b'); + * // => false + */ + function hasIn(object, path) { + return object != null && hasPath(object, path, baseHasIn); + } + + /** + * Creates an object composed of the inverted keys and values of `object`. + * If `object` contains duplicate values, subsequent values overwrite + * property assignments of previous values. + * + * @static + * @memberOf _ + * @since 0.7.0 + * @category Object + * @param {Object} object The object to invert. + * @returns {Object} Returns the new inverted object. + * @example + * + * var object = { 'a': 1, 'b': 2, 'c': 1 }; + * + * _.invert(object); + * // => { '1': 'c', '2': 'b' } + */ + var invert = createInverter(function(result, value, key) { + if (value != null && + typeof value.toString != 'function') { + value = nativeObjectToString.call(value); + } + + result[value] = key; + }, constant(identity)); + + /** + * This method is like `_.invert` except that the inverted object is generated + * from the results of running each element of `object` thru `iteratee`. The + * corresponding inverted value of each inverted key is an array of keys + * responsible for generating the inverted value. The iteratee is invoked + * with one argument: (value). + * + * @static + * @memberOf _ + * @since 4.1.0 + * @category Object + * @param {Object} object The object to invert. + * @param {Function} [iteratee=_.identity] The iteratee invoked per element. + * @returns {Object} Returns the new inverted object. + * @example + * + * var object = { 'a': 1, 'b': 2, 'c': 1 }; + * + * _.invertBy(object); + * // => { '1': ['a', 'c'], '2': ['b'] } + * + * _.invertBy(object, function(value) { + * return 'group' + value; + * }); + * // => { 'group1': ['a', 'c'], 'group2': ['b'] } + */ + var invertBy = createInverter(function(result, value, key) { + if (value != null && + typeof value.toString != 'function') { + value = nativeObjectToString.call(value); + } + + if (hasOwnProperty.call(result, value)) { + result[value].push(key); + } else { + result[value] = [key]; + } + }, getIteratee); + + /** + * Invokes the method at `path` of `object`. + * + * @static + * @memberOf _ + * @since 4.0.0 + * @category Object + * @param {Object} object The object to query. + * @param {Array|string} path The path of the method to invoke. + * @param {...*} [args] The arguments to invoke the method with. + * @returns {*} Returns the result of the invoked method. + * @example + * + * var object = { 'a': [{ 'b': { 'c': [1, 2, 3, 4] } }] }; + * + * _.invoke(object, 'a[0].b.c.slice', 1, 3); + * // => [2, 3] + */ + var invoke = baseRest(baseInvoke); + + /** + * Creates an array of the own enumerable property names of `object`. + * + * **Note:** Non-object values are coerced to objects. See the + * [ES spec](http://ecma-international.org/ecma-262/7.0/#sec-object.keys) + * for more details. + * + * @static + * @since 0.1.0 + * @memberOf _ + * @category Object + * @param {Object} object The object to query. + * @returns {Array} Returns the array of property names. + * @example + * + * function Foo() { + * this.a = 1; + * this.b = 2; + * } + * + * Foo.prototype.c = 3; + * + * _.keys(new Foo); + * // => ['a', 'b'] (iteration order is not guaranteed) + * + * _.keys('hi'); + * // => ['0', '1'] + */ + function keys(object) { + return isArrayLike(object) ? arrayLikeKeys(object) : baseKeys(object); + } + + /** + * Creates an array of the own and inherited enumerable property names of `object`. + * + * **Note:** Non-object values are coerced to objects. + * + * @static + * @memberOf _ + * @since 3.0.0 + * @category Object + * @param {Object} object The object to query. + * @returns {Array} Returns the array of property names. + * @example + * + * function Foo() { + * this.a = 1; + * this.b = 2; + * } + * + * Foo.prototype.c = 3; + * + * _.keysIn(new Foo); + * // => ['a', 'b', 'c'] (iteration order is not guaranteed) + */ + function keysIn(object) { + return isArrayLike(object) ? arrayLikeKeys(object, true) : baseKeysIn(object); + } + + /** + * The opposite of `_.mapValues`; this method creates an object with the + * same values as `object` and keys generated by running each own enumerable + * string keyed property of `object` thru `iteratee`. The iteratee is invoked + * with three arguments: (value, key, object). + * + * @static + * @memberOf _ + * @since 3.8.0 + * @category Object + * @param {Object} object The object to iterate over. + * @param {Function} [iteratee=_.identity] The function invoked per iteration. + * @returns {Object} Returns the new mapped object. + * @see _.mapValues + * @example + * + * _.mapKeys({ 'a': 1, 'b': 2 }, function(value, key) { + * return key + value; + * }); + * // => { 'a1': 1, 'b2': 2 } + */ + function mapKeys(object, iteratee) { + var result = {}; + iteratee = getIteratee(iteratee, 3); + + baseForOwn(object, function(value, key, object) { + baseAssignValue(result, iteratee(value, key, object), value); + }); + return result; + } + + /** + * Creates an object with the same keys as `object` and values generated + * by running each own enumerable string keyed property of `object` thru + * `iteratee`. The iteratee is invoked with three arguments: + * (value, key, object). + * + * @static + * @memberOf _ + * @since 2.4.0 + * @category Object + * @param {Object} object The object to iterate over. + * @param {Function} [iteratee=_.identity] The function invoked per iteration. + * @returns {Object} Returns the new mapped object. + * @see _.mapKeys + * @example + * + * var users = { + * 'fred': { 'user': 'fred', 'age': 40 }, + * 'pebbles': { 'user': 'pebbles', 'age': 1 } + * }; + * + * _.mapValues(users, function(o) { return o.age; }); + * // => { 'fred': 40, 'pebbles': 1 } (iteration order is not guaranteed) + * + * // The `_.property` iteratee shorthand. + * _.mapValues(users, 'age'); + * // => { 'fred': 40, 'pebbles': 1 } (iteration order is not guaranteed) + */ + function mapValues(object, iteratee) { + var result = {}; + iteratee = getIteratee(iteratee, 3); + + baseForOwn(object, function(value, key, object) { + baseAssignValue(result, key, iteratee(value, key, object)); + }); + return result; + } + + /** + * This method is like `_.assign` except that it recursively merges own and + * inherited enumerable string keyed properties of source objects into the + * destination object. Source properties that resolve to `undefined` are + * skipped if a destination value exists. Array and plain object properties + * are merged recursively. Other objects and value types are overridden by + * assignment. Source objects are applied from left to right. Subsequent + * sources overwrite property assignments of previous sources. + * + * **Note:** This method mutates `object`. + * + * @static + * @memberOf _ + * @since 0.5.0 + * @category Object + * @param {Object} object The destination object. + * @param {...Object} [sources] The source objects. + * @returns {Object} Returns `object`. + * @example + * + * var object = { + * 'a': [{ 'b': 2 }, { 'd': 4 }] + * }; + * + * var other = { + * 'a': [{ 'c': 3 }, { 'e': 5 }] + * }; + * + * _.merge(object, other); + * // => { 'a': [{ 'b': 2, 'c': 3 }, { 'd': 4, 'e': 5 }] } + */ + var merge = createAssigner(function(object, source, srcIndex) { + baseMerge(object, source, srcIndex); + }); + + /** + * This method is like `_.merge` except that it accepts `customizer` which + * is invoked to produce the merged values of the destination and source + * properties. If `customizer` returns `undefined`, merging is handled by the + * method instead. The `customizer` is invoked with six arguments: + * (objValue, srcValue, key, object, source, stack). + * + * **Note:** This method mutates `object`. + * + * @static + * @memberOf _ + * @since 4.0.0 + * @category Object + * @param {Object} object The destination object. + * @param {...Object} sources The source objects. + * @param {Function} customizer The function to customize assigned values. + * @returns {Object} Returns `object`. + * @example + * + * function customizer(objValue, srcValue) { + * if (_.isArray(objValue)) { + * return objValue.concat(srcValue); + * } + * } + * + * var object = { 'a': [1], 'b': [2] }; + * var other = { 'a': [3], 'b': [4] }; + * + * _.mergeWith(object, other, customizer); + * // => { 'a': [1, 3], 'b': [2, 4] } + */ + var mergeWith = createAssigner(function(object, source, srcIndex, customizer) { + baseMerge(object, source, srcIndex, customizer); + }); + + /** + * The opposite of `_.pick`; this method creates an object composed of the + * own and inherited enumerable property paths of `object` that are not omitted. + * + * **Note:** This method is considerably slower than `_.pick`. + * + * @static + * @since 0.1.0 + * @memberOf _ + * @category Object + * @param {Object} object The source object. + * @param {...(string|string[])} [paths] The property paths to omit. + * @returns {Object} Returns the new object. + * @example + * + * var object = { 'a': 1, 'b': '2', 'c': 3 }; + * + * _.omit(object, ['a', 'c']); + * // => { 'b': '2' } + */ + var omit = flatRest(function(object, paths) { + var result = {}; + if (object == null) { + return result; + } + var isDeep = false; + paths = arrayMap(paths, function(path) { + path = castPath(path, object); + isDeep || (isDeep = path.length > 1); + return path; + }); + copyObject(object, getAllKeysIn(object), result); + if (isDeep) { + result = baseClone(result, CLONE_DEEP_FLAG | CLONE_FLAT_FLAG | CLONE_SYMBOLS_FLAG, customOmitClone); + } + var length = paths.length; + while (length--) { + baseUnset(result, paths[length]); + } + return result; + }); + + /** + * The opposite of `_.pickBy`; this method creates an object composed of + * the own and inherited enumerable string keyed properties of `object` that + * `predicate` doesn't return truthy for. The predicate is invoked with two + * arguments: (value, key). + * + * @static + * @memberOf _ + * @since 4.0.0 + * @category Object + * @param {Object} object The source object. + * @param {Function} [predicate=_.identity] The function invoked per property. + * @returns {Object} Returns the new object. + * @example + * + * var object = { 'a': 1, 'b': '2', 'c': 3 }; + * + * _.omitBy(object, _.isNumber); + * // => { 'b': '2' } + */ + function omitBy(object, predicate) { + return pickBy(object, negate(getIteratee(predicate))); + } + + /** + * Creates an object composed of the picked `object` properties. + * + * @static + * @since 0.1.0 + * @memberOf _ + * @category Object + * @param {Object} object The source object. + * @param {...(string|string[])} [paths] The property paths to pick. + * @returns {Object} Returns the new object. + * @example + * + * var object = { 'a': 1, 'b': '2', 'c': 3 }; + * + * _.pick(object, ['a', 'c']); + * // => { 'a': 1, 'c': 3 } + */ + var pick = flatRest(function(object, paths) { + return object == null ? {} : basePick(object, paths); + }); + + /** + * Creates an object composed of the `object` properties `predicate` returns + * truthy for. The predicate is invoked with two arguments: (value, key). + * + * @static + * @memberOf _ + * @since 4.0.0 + * @category Object + * @param {Object} object The source object. + * @param {Function} [predicate=_.identity] The function invoked per property. + * @returns {Object} Returns the new object. + * @example + * + * var object = { 'a': 1, 'b': '2', 'c': 3 }; + * + * _.pickBy(object, _.isNumber); + * // => { 'a': 1, 'c': 3 } + */ + function pickBy(object, predicate) { + if (object == null) { + return {}; + } + var props = arrayMap(getAllKeysIn(object), function(prop) { + return [prop]; + }); + predicate = getIteratee(predicate); + return basePickBy(object, props, function(value, path) { + return predicate(value, path[0]); + }); + } + + /** + * This method is like `_.get` except that if the resolved value is a + * function it's invoked with the `this` binding of its parent object and + * its result is returned. + * + * @static + * @since 0.1.0 + * @memberOf _ + * @category Object + * @param {Object} object The object to query. + * @param {Array|string} path The path of the property to resolve. + * @param {*} [defaultValue] The value returned for `undefined` resolved values. + * @returns {*} Returns the resolved value. + * @example + * + * var object = { 'a': [{ 'b': { 'c1': 3, 'c2': _.constant(4) } }] }; + * + * _.result(object, 'a[0].b.c1'); + * // => 3 + * + * _.result(object, 'a[0].b.c2'); + * // => 4 + * + * _.result(object, 'a[0].b.c3', 'default'); + * // => 'default' + * + * _.result(object, 'a[0].b.c3', _.constant('default')); + * // => 'default' + */ + function result(object, path, defaultValue) { + path = castPath(path, object); + + var index = -1, + length = path.length; + + // Ensure the loop is entered when path is empty. + if (!length) { + length = 1; + object = undefined; + } + while (++index < length) { + var value = object == null ? undefined : object[toKey(path[index])]; + if (value === undefined) { + index = length; + value = defaultValue; + } + object = isFunction(value) ? value.call(object) : value; + } + return object; + } + + /** + * Sets the value at `path` of `object`. If a portion of `path` doesn't exist, + * it's created. Arrays are created for missing index properties while objects + * are created for all other missing properties. Use `_.setWith` to customize + * `path` creation. + * + * **Note:** This method mutates `object`. + * + * @static + * @memberOf _ + * @since 3.7.0 + * @category Object + * @param {Object} object The object to modify. + * @param {Array|string} path The path of the property to set. + * @param {*} value The value to set. + * @returns {Object} Returns `object`. + * @example + * + * var object = { 'a': [{ 'b': { 'c': 3 } }] }; + * + * _.set(object, 'a[0].b.c', 4); + * console.log(object.a[0].b.c); + * // => 4 + * + * _.set(object, ['x', '0', 'y', 'z'], 5); + * console.log(object.x[0].y.z); + * // => 5 + */ + function set(object, path, value) { + return object == null ? object : baseSet(object, path, value); + } + + /** + * This method is like `_.set` except that it accepts `customizer` which is + * invoked to produce the objects of `path`. If `customizer` returns `undefined` + * path creation is handled by the method instead. The `customizer` is invoked + * with three arguments: (nsValue, key, nsObject). + * + * **Note:** This method mutates `object`. + * + * @static + * @memberOf _ + * @since 4.0.0 + * @category Object + * @param {Object} object The object to modify. + * @param {Array|string} path The path of the property to set. + * @param {*} value The value to set. + * @param {Function} [customizer] The function to customize assigned values. + * @returns {Object} Returns `object`. + * @example + * + * var object = {}; + * + * _.setWith(object, '[0][1]', 'a', Object); + * // => { '0': { '1': 'a' } } + */ + function setWith(object, path, value, customizer) { + customizer = typeof customizer == 'function' ? customizer : undefined; + return object == null ? object : baseSet(object, path, value, customizer); + } + + /** + * Creates an array of own enumerable string keyed-value pairs for `object` + * which can be consumed by `_.fromPairs`. If `object` is a map or set, its + * entries are returned. + * + * @static + * @memberOf _ + * @since 4.0.0 + * @alias entries + * @category Object + * @param {Object} object The object to query. + * @returns {Array} Returns the key-value pairs. + * @example + * + * function Foo() { + * this.a = 1; + * this.b = 2; + * } + * + * Foo.prototype.c = 3; + * + * _.toPairs(new Foo); + * // => [['a', 1], ['b', 2]] (iteration order is not guaranteed) + */ + var toPairs = createToPairs(keys); + + /** + * Creates an array of own and inherited enumerable string keyed-value pairs + * for `object` which can be consumed by `_.fromPairs`. If `object` is a map + * or set, its entries are returned. + * + * @static + * @memberOf _ + * @since 4.0.0 + * @alias entriesIn + * @category Object + * @param {Object} object The object to query. + * @returns {Array} Returns the key-value pairs. + * @example + * + * function Foo() { + * this.a = 1; + * this.b = 2; + * } + * + * Foo.prototype.c = 3; + * + * _.toPairsIn(new Foo); + * // => [['a', 1], ['b', 2], ['c', 3]] (iteration order is not guaranteed) + */ + var toPairsIn = createToPairs(keysIn); + + /** + * An alternative to `_.reduce`; this method transforms `object` to a new + * `accumulator` object which is the result of running each of its own + * enumerable string keyed properties thru `iteratee`, with each invocation + * potentially mutating the `accumulator` object. If `accumulator` is not + * provided, a new object with the same `[[Prototype]]` will be used. The + * iteratee is invoked with four arguments: (accumulator, value, key, object). + * Iteratee functions may exit iteration early by explicitly returning `false`. + * + * @static + * @memberOf _ + * @since 1.3.0 + * @category Object + * @param {Object} object The object to iterate over. + * @param {Function} [iteratee=_.identity] The function invoked per iteration. + * @param {*} [accumulator] The custom accumulator value. + * @returns {*} Returns the accumulated value. + * @example + * + * _.transform([2, 3, 4], function(result, n) { + * result.push(n *= n); + * return n % 2 == 0; + * }, []); + * // => [4, 9] + * + * _.transform({ 'a': 1, 'b': 2, 'c': 1 }, function(result, value, key) { + * (result[value] || (result[value] = [])).push(key); + * }, {}); + * // => { '1': ['a', 'c'], '2': ['b'] } + */ + function transform(object, iteratee, accumulator) { + var isArr = isArray(object), + isArrLike = isArr || isBuffer(object) || isTypedArray(object); + + iteratee = getIteratee(iteratee, 4); + if (accumulator == null) { + var Ctor = object && object.constructor; + if (isArrLike) { + accumulator = isArr ? new Ctor : []; + } + else if (isObject(object)) { + accumulator = isFunction(Ctor) ? baseCreate(getPrototype(object)) : {}; + } + else { + accumulator = {}; + } + } + (isArrLike ? arrayEach : baseForOwn)(object, function(value, index, object) { + return iteratee(accumulator, value, index, object); + }); + return accumulator; + } + + /** + * Removes the property at `path` of `object`. + * + * **Note:** This method mutates `object`. + * + * @static + * @memberOf _ + * @since 4.0.0 + * @category Object + * @param {Object} object The object to modify. + * @param {Array|string} path The path of the property to unset. + * @returns {boolean} Returns `true` if the property is deleted, else `false`. + * @example + * + * var object = { 'a': [{ 'b': { 'c': 7 } }] }; + * _.unset(object, 'a[0].b.c'); + * // => true + * + * console.log(object); + * // => { 'a': [{ 'b': {} }] }; + * + * _.unset(object, ['a', '0', 'b', 'c']); + * // => true + * + * console.log(object); + * // => { 'a': [{ 'b': {} }] }; + */ + function unset(object, path) { + return object == null ? true : baseUnset(object, path); + } + + /** + * This method is like `_.set` except that accepts `updater` to produce the + * value to set. Use `_.updateWith` to customize `path` creation. The `updater` + * is invoked with one argument: (value). + * + * **Note:** This method mutates `object`. + * + * @static + * @memberOf _ + * @since 4.6.0 + * @category Object + * @param {Object} object The object to modify. + * @param {Array|string} path The path of the property to set. + * @param {Function} updater The function to produce the updated value. + * @returns {Object} Returns `object`. + * @example + * + * var object = { 'a': [{ 'b': { 'c': 3 } }] }; + * + * _.update(object, 'a[0].b.c', function(n) { return n * n; }); + * console.log(object.a[0].b.c); + * // => 9 + * + * _.update(object, 'x[0].y.z', function(n) { return n ? n + 1 : 0; }); + * console.log(object.x[0].y.z); + * // => 0 + */ + function update(object, path, updater) { + return object == null ? object : baseUpdate(object, path, castFunction(updater)); + } + + /** + * This method is like `_.update` except that it accepts `customizer` which is + * invoked to produce the objects of `path`. If `customizer` returns `undefined` + * path creation is handled by the method instead. The `customizer` is invoked + * with three arguments: (nsValue, key, nsObject). + * + * **Note:** This method mutates `object`. + * + * @static + * @memberOf _ + * @since 4.6.0 + * @category Object + * @param {Object} object The object to modify. + * @param {Array|string} path The path of the property to set. + * @param {Function} updater The function to produce the updated value. + * @param {Function} [customizer] The function to customize assigned values. + * @returns {Object} Returns `object`. + * @example + * + * var object = {}; + * + * _.updateWith(object, '[0][1]', _.constant('a'), Object); + * // => { '0': { '1': 'a' } } + */ + function updateWith(object, path, updater, customizer) { + customizer = typeof customizer == 'function' ? customizer : undefined; + return object == null ? object : baseUpdate(object, path, castFunction(updater), customizer); + } + + /** + * Creates an array of the own enumerable string keyed property values of `object`. + * + * **Note:** Non-object values are coerced to objects. + * + * @static + * @since 0.1.0 + * @memberOf _ + * @category Object + * @param {Object} object The object to query. + * @returns {Array} Returns the array of property values. + * @example + * + * function Foo() { + * this.a = 1; + * this.b = 2; + * } + * + * Foo.prototype.c = 3; + * + * _.values(new Foo); + * // => [1, 2] (iteration order is not guaranteed) + * + * _.values('hi'); + * // => ['h', 'i'] + */ + function values(object) { + return object == null ? [] : baseValues(object, keys(object)); + } + + /** + * Creates an array of the own and inherited enumerable string keyed property + * values of `object`. + * + * **Note:** Non-object values are coerced to objects. + * + * @static + * @memberOf _ + * @since 3.0.0 + * @category Object + * @param {Object} object The object to query. + * @returns {Array} Returns the array of property values. + * @example + * + * function Foo() { + * this.a = 1; + * this.b = 2; + * } + * + * Foo.prototype.c = 3; + * + * _.valuesIn(new Foo); + * // => [1, 2, 3] (iteration order is not guaranteed) + */ + function valuesIn(object) { + return object == null ? [] : baseValues(object, keysIn(object)); + } + + /*------------------------------------------------------------------------*/ + + /** + * Clamps `number` within the inclusive `lower` and `upper` bounds. + * + * @static + * @memberOf _ + * @since 4.0.0 + * @category Number + * @param {number} number The number to clamp. + * @param {number} [lower] The lower bound. + * @param {number} upper The upper bound. + * @returns {number} Returns the clamped number. + * @example + * + * _.clamp(-10, -5, 5); + * // => -5 + * + * _.clamp(10, -5, 5); + * // => 5 + */ + function clamp(number, lower, upper) { + if (upper === undefined) { + upper = lower; + lower = undefined; + } + if (upper !== undefined) { + upper = toNumber(upper); + upper = upper === upper ? upper : 0; + } + if (lower !== undefined) { + lower = toNumber(lower); + lower = lower === lower ? lower : 0; + } + return baseClamp(toNumber(number), lower, upper); + } + + /** + * Checks if `n` is between `start` and up to, but not including, `end`. If + * `end` is not specified, it's set to `start` with `start` then set to `0`. + * If `start` is greater than `end` the params are swapped to support + * negative ranges. + * + * @static + * @memberOf _ + * @since 3.3.0 + * @category Number + * @param {number} number The number to check. + * @param {number} [start=0] The start of the range. + * @param {number} end The end of the range. + * @returns {boolean} Returns `true` if `number` is in the range, else `false`. + * @see _.range, _.rangeRight + * @example + * + * _.inRange(3, 2, 4); + * // => true + * + * _.inRange(4, 8); + * // => true + * + * _.inRange(4, 2); + * // => false + * + * _.inRange(2, 2); + * // => false + * + * _.inRange(1.2, 2); + * // => true + * + * _.inRange(5.2, 4); + * // => false + * + * _.inRange(-3, -2, -6); + * // => true + */ + function inRange(number, start, end) { + start = toFinite(start); + if (end === undefined) { + end = start; + start = 0; + } else { + end = toFinite(end); + } + number = toNumber(number); + return baseInRange(number, start, end); + } + + /** + * Produces a random number between the inclusive `lower` and `upper` bounds. + * If only one argument is provided a number between `0` and the given number + * is returned. If `floating` is `true`, or either `lower` or `upper` are + * floats, a floating-point number is returned instead of an integer. + * + * **Note:** JavaScript follows the IEEE-754 standard for resolving + * floating-point values which can produce unexpected results. + * + * @static + * @memberOf _ + * @since 0.7.0 + * @category Number + * @param {number} [lower=0] The lower bound. + * @param {number} [upper=1] The upper bound. + * @param {boolean} [floating] Specify returning a floating-point number. + * @returns {number} Returns the random number. + * @example + * + * _.random(0, 5); + * // => an integer between 0 and 5 + * + * _.random(5); + * // => also an integer between 0 and 5 + * + * _.random(5, true); + * // => a floating-point number between 0 and 5 + * + * _.random(1.2, 5.2); + * // => a floating-point number between 1.2 and 5.2 + */ + function random(lower, upper, floating) { + if (floating && typeof floating != 'boolean' && isIterateeCall(lower, upper, floating)) { + upper = floating = undefined; + } + if (floating === undefined) { + if (typeof upper == 'boolean') { + floating = upper; + upper = undefined; + } + else if (typeof lower == 'boolean') { + floating = lower; + lower = undefined; + } + } + if (lower === undefined && upper === undefined) { + lower = 0; + upper = 1; + } + else { + lower = toFinite(lower); + if (upper === undefined) { + upper = lower; + lower = 0; + } else { + upper = toFinite(upper); + } + } + if (lower > upper) { + var temp = lower; + lower = upper; + upper = temp; + } + if (floating || lower % 1 || upper % 1) { + var rand = nativeRandom(); + return nativeMin(lower + (rand * (upper - lower + freeParseFloat('1e-' + ((rand + '').length - 1)))), upper); + } + return baseRandom(lower, upper); + } + + /*------------------------------------------------------------------------*/ + + /** + * Converts `string` to [camel case](https://en.wikipedia.org/wiki/CamelCase). + * + * @static + * @memberOf _ + * @since 3.0.0 + * @category String + * @param {string} [string=''] The string to convert. + * @returns {string} Returns the camel cased string. + * @example + * + * _.camelCase('Foo Bar'); + * // => 'fooBar' + * + * _.camelCase('--foo-bar--'); + * // => 'fooBar' + * + * _.camelCase('__FOO_BAR__'); + * // => 'fooBar' + */ + var camelCase = createCompounder(function(result, word, index) { + word = word.toLowerCase(); + return result + (index ? capitalize(word) : word); + }); + + /** + * Converts the first character of `string` to upper case and the remaining + * to lower case. + * + * @static + * @memberOf _ + * @since 3.0.0 + * @category String + * @param {string} [string=''] The string to capitalize. + * @returns {string} Returns the capitalized string. + * @example + * + * _.capitalize('FRED'); + * // => 'Fred' + */ + function capitalize(string) { + return upperFirst(toString(string).toLowerCase()); + } + + /** + * Deburrs `string` by converting + * [Latin-1 Supplement](https://en.wikipedia.org/wiki/Latin-1_Supplement_(Unicode_block)#Character_table) + * and [Latin Extended-A](https://en.wikipedia.org/wiki/Latin_Extended-A) + * letters to basic Latin letters and removing + * [combining diacritical marks](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks). + * + * @static + * @memberOf _ + * @since 3.0.0 + * @category String + * @param {string} [string=''] The string to deburr. + * @returns {string} Returns the deburred string. + * @example + * + * _.deburr('déjà vu'); + * // => 'deja vu' + */ + function deburr(string) { + string = toString(string); + return string && string.replace(reLatin, deburrLetter).replace(reComboMark, ''); + } + + /** + * Checks if `string` ends with the given target string. + * + * @static + * @memberOf _ + * @since 3.0.0 + * @category String + * @param {string} [string=''] The string to inspect. + * @param {string} [target] The string to search for. + * @param {number} [position=string.length] The position to search up to. + * @returns {boolean} Returns `true` if `string` ends with `target`, + * else `false`. + * @example + * + * _.endsWith('abc', 'c'); + * // => true + * + * _.endsWith('abc', 'b'); + * // => false + * + * _.endsWith('abc', 'b', 2); + * // => true + */ + function endsWith(string, target, position) { + string = toString(string); + target = baseToString(target); + + var length = string.length; + position = position === undefined + ? length + : baseClamp(toInteger(position), 0, length); + + var end = position; + position -= target.length; + return position >= 0 && string.slice(position, end) == target; + } + + /** + * Converts the characters "&", "<", ">", '"', and "'" in `string` to their + * corresponding HTML entities. + * + * **Note:** No other characters are escaped. To escape additional + * characters use a third-party library like [_he_](https://mths.be/he). + * + * Though the ">" character is escaped for symmetry, characters like + * ">" and "/" don't need escaping in HTML and have no special meaning + * unless they're part of a tag or unquoted attribute value. See + * [Mathias Bynens's article](https://mathiasbynens.be/notes/ambiguous-ampersands) + * (under "semi-related fun fact") for more details. + * + * When working with HTML you should always + * [quote attribute values](http://wonko.com/post/html-escaping) to reduce + * XSS vectors. + * + * @static + * @since 0.1.0 + * @memberOf _ + * @category String + * @param {string} [string=''] The string to escape. + * @returns {string} Returns the escaped string. + * @example + * + * _.escape('fred, barney, & pebbles'); + * // => 'fred, barney, & pebbles' + */ + function escape(string) { + string = toString(string); + return (string && reHasUnescapedHtml.test(string)) + ? string.replace(reUnescapedHtml, escapeHtmlChar) + : string; + } + + /** + * Escapes the `RegExp` special characters "^", "$", "\", ".", "*", "+", + * "?", "(", ")", "[", "]", "{", "}", and "|" in `string`. + * + * @static + * @memberOf _ + * @since 3.0.0 + * @category String + * @param {string} [string=''] The string to escape. + * @returns {string} Returns the escaped string. + * @example + * + * _.escapeRegExp('[lodash](https://lodash.com/)'); + * // => '\[lodash\]\(https://lodash\.com/\)' + */ + function escapeRegExp(string) { + string = toString(string); + return (string && reHasRegExpChar.test(string)) + ? string.replace(reRegExpChar, '\\$&') + : string; + } + + /** + * Converts `string` to + * [kebab case](https://en.wikipedia.org/wiki/Letter_case#Special_case_styles). + * + * @static + * @memberOf _ + * @since 3.0.0 + * @category String + * @param {string} [string=''] The string to convert. + * @returns {string} Returns the kebab cased string. + * @example + * + * _.kebabCase('Foo Bar'); + * // => 'foo-bar' + * + * _.kebabCase('fooBar'); + * // => 'foo-bar' + * + * _.kebabCase('__FOO_BAR__'); + * // => 'foo-bar' + */ + var kebabCase = createCompounder(function(result, word, index) { + return result + (index ? '-' : '') + word.toLowerCase(); + }); + + /** + * Converts `string`, as space separated words, to lower case. + * + * @static + * @memberOf _ + * @since 4.0.0 + * @category String + * @param {string} [string=''] The string to convert. + * @returns {string} Returns the lower cased string. + * @example + * + * _.lowerCase('--Foo-Bar--'); + * // => 'foo bar' + * + * _.lowerCase('fooBar'); + * // => 'foo bar' + * + * _.lowerCase('__FOO_BAR__'); + * // => 'foo bar' + */ + var lowerCase = createCompounder(function(result, word, index) { + return result + (index ? ' ' : '') + word.toLowerCase(); + }); + + /** + * Converts the first character of `string` to lower case. + * + * @static + * @memberOf _ + * @since 4.0.0 + * @category String + * @param {string} [string=''] The string to convert. + * @returns {string} Returns the converted string. + * @example + * + * _.lowerFirst('Fred'); + * // => 'fred' + * + * _.lowerFirst('FRED'); + * // => 'fRED' + */ + var lowerFirst = createCaseFirst('toLowerCase'); + + /** + * Pads `string` on the left and right sides if it's shorter than `length`. + * Padding characters are truncated if they can't be evenly divided by `length`. + * + * @static + * @memberOf _ + * @since 3.0.0 + * @category String + * @param {string} [string=''] The string to pad. + * @param {number} [length=0] The padding length. + * @param {string} [chars=' '] The string used as padding. + * @returns {string} Returns the padded string. + * @example + * + * _.pad('abc', 8); + * // => ' abc ' + * + * _.pad('abc', 8, '_-'); + * // => '_-abc_-_' + * + * _.pad('abc', 3); + * // => 'abc' + */ + function pad(string, length, chars) { + string = toString(string); + length = toInteger(length); + + var strLength = length ? stringSize(string) : 0; + if (!length || strLength >= length) { + return string; + } + var mid = (length - strLength) / 2; + return ( + createPadding(nativeFloor(mid), chars) + + string + + createPadding(nativeCeil(mid), chars) + ); + } + + /** + * Pads `string` on the right side if it's shorter than `length`. Padding + * characters are truncated if they exceed `length`. + * + * @static + * @memberOf _ + * @since 4.0.0 + * @category String + * @param {string} [string=''] The string to pad. + * @param {number} [length=0] The padding length. + * @param {string} [chars=' '] The string used as padding. + * @returns {string} Returns the padded string. + * @example + * + * _.padEnd('abc', 6); + * // => 'abc ' + * + * _.padEnd('abc', 6, '_-'); + * // => 'abc_-_' + * + * _.padEnd('abc', 3); + * // => 'abc' + */ + function padEnd(string, length, chars) { + string = toString(string); + length = toInteger(length); + + var strLength = length ? stringSize(string) : 0; + return (length && strLength < length) + ? (string + createPadding(length - strLength, chars)) + : string; + } + + /** + * Pads `string` on the left side if it's shorter than `length`. Padding + * characters are truncated if they exceed `length`. + * + * @static + * @memberOf _ + * @since 4.0.0 + * @category String + * @param {string} [string=''] The string to pad. + * @param {number} [length=0] The padding length. + * @param {string} [chars=' '] The string used as padding. + * @returns {string} Returns the padded string. + * @example + * + * _.padStart('abc', 6); + * // => ' abc' + * + * _.padStart('abc', 6, '_-'); + * // => '_-_abc' + * + * _.padStart('abc', 3); + * // => 'abc' + */ + function padStart(string, length, chars) { + string = toString(string); + length = toInteger(length); + + var strLength = length ? stringSize(string) : 0; + return (length && strLength < length) + ? (createPadding(length - strLength, chars) + string) + : string; + } + + /** + * Converts `string` to an integer of the specified radix. If `radix` is + * `undefined` or `0`, a `radix` of `10` is used unless `value` is a + * hexadecimal, in which case a `radix` of `16` is used. + * + * **Note:** This method aligns with the + * [ES5 implementation](https://es5.github.io/#x15.1.2.2) of `parseInt`. + * + * @static + * @memberOf _ + * @since 1.1.0 + * @category String + * @param {string} string The string to convert. + * @param {number} [radix=10] The radix to interpret `value` by. + * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`. + * @returns {number} Returns the converted integer. + * @example + * + * _.parseInt('08'); + * // => 8 + * + * _.map(['6', '08', '10'], _.parseInt); + * // => [6, 8, 10] + */ + function parseInt(string, radix, guard) { + if (guard || radix == null) { + radix = 0; + } else if (radix) { + radix = +radix; + } + return nativeParseInt(toString(string).replace(reTrimStart, ''), radix || 0); + } + + /** + * Repeats the given string `n` times. + * + * @static + * @memberOf _ + * @since 3.0.0 + * @category String + * @param {string} [string=''] The string to repeat. + * @param {number} [n=1] The number of times to repeat the string. + * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`. + * @returns {string} Returns the repeated string. + * @example + * + * _.repeat('*', 3); + * // => '***' + * + * _.repeat('abc', 2); + * // => 'abcabc' + * + * _.repeat('abc', 0); + * // => '' + */ + function repeat(string, n, guard) { + if ((guard ? isIterateeCall(string, n, guard) : n === undefined)) { + n = 1; + } else { + n = toInteger(n); + } + return baseRepeat(toString(string), n); + } + + /** + * Replaces matches for `pattern` in `string` with `replacement`. + * + * **Note:** This method is based on + * [`String#replace`](https://mdn.io/String/replace). + * + * @static + * @memberOf _ + * @since 4.0.0 + * @category String + * @param {string} [string=''] The string to modify. + * @param {RegExp|string} pattern The pattern to replace. + * @param {Function|string} replacement The match replacement. + * @returns {string} Returns the modified string. + * @example + * + * _.replace('Hi Fred', 'Fred', 'Barney'); + * // => 'Hi Barney' + */ + function replace() { + var args = arguments, + string = toString(args[0]); + + return args.length < 3 ? string : string.replace(args[1], args[2]); + } + + /** + * Converts `string` to + * [snake case](https://en.wikipedia.org/wiki/Snake_case). + * + * @static + * @memberOf _ + * @since 3.0.0 + * @category String + * @param {string} [string=''] The string to convert. + * @returns {string} Returns the snake cased string. + * @example + * + * _.snakeCase('Foo Bar'); + * // => 'foo_bar' + * + * _.snakeCase('fooBar'); + * // => 'foo_bar' + * + * _.snakeCase('--FOO-BAR--'); + * // => 'foo_bar' + */ + var snakeCase = createCompounder(function(result, word, index) { + return result + (index ? '_' : '') + word.toLowerCase(); + }); + + /** + * Splits `string` by `separator`. + * + * **Note:** This method is based on + * [`String#split`](https://mdn.io/String/split). + * + * @static + * @memberOf _ + * @since 4.0.0 + * @category String + * @param {string} [string=''] The string to split. + * @param {RegExp|string} separator The separator pattern to split by. + * @param {number} [limit] The length to truncate results to. + * @returns {Array} Returns the string segments. + * @example + * + * _.split('a-b-c', '-', 2); + * // => ['a', 'b'] + */ + function split(string, separator, limit) { + if (limit && typeof limit != 'number' && isIterateeCall(string, separator, limit)) { + separator = limit = undefined; + } + limit = limit === undefined ? MAX_ARRAY_LENGTH : limit >>> 0; + if (!limit) { + return []; + } + string = toString(string); + if (string && ( + typeof separator == 'string' || + (separator != null && !isRegExp(separator)) + )) { + separator = baseToString(separator); + if (!separator && hasUnicode(string)) { + return castSlice(stringToArray(string), 0, limit); + } + } + return string.split(separator, limit); + } + + /** + * Converts `string` to + * [start case](https://en.wikipedia.org/wiki/Letter_case#Stylistic_or_specialised_usage). + * + * @static + * @memberOf _ + * @since 3.1.0 + * @category String + * @param {string} [string=''] The string to convert. + * @returns {string} Returns the start cased string. + * @example + * + * _.startCase('--foo-bar--'); + * // => 'Foo Bar' + * + * _.startCase('fooBar'); + * // => 'Foo Bar' + * + * _.startCase('__FOO_BAR__'); + * // => 'FOO BAR' + */ + var startCase = createCompounder(function(result, word, index) { + return result + (index ? ' ' : '') + upperFirst(word); + }); + + /** + * Checks if `string` starts with the given target string. + * + * @static + * @memberOf _ + * @since 3.0.0 + * @category String + * @param {string} [string=''] The string to inspect. + * @param {string} [target] The string to search for. + * @param {number} [position=0] The position to search from. + * @returns {boolean} Returns `true` if `string` starts with `target`, + * else `false`. + * @example + * + * _.startsWith('abc', 'a'); + * // => true + * + * _.startsWith('abc', 'b'); + * // => false + * + * _.startsWith('abc', 'b', 1); + * // => true + */ + function startsWith(string, target, position) { + string = toString(string); + position = position == null + ? 0 + : baseClamp(toInteger(position), 0, string.length); + + target = baseToString(target); + return string.slice(position, position + target.length) == target; + } + + /** + * Creates a compiled template function that can interpolate data properties + * in "interpolate" delimiters, HTML-escape interpolated data properties in + * "escape" delimiters, and execute JavaScript in "evaluate" delimiters. Data + * properties may be accessed as free variables in the template. If a setting + * object is given, it takes precedence over `_.templateSettings` values. + * + * **Note:** In the development build `_.template` utilizes + * [sourceURLs](http://www.html5rocks.com/en/tutorials/developertools/sourcemaps/#toc-sourceurl) + * for easier debugging. + * + * For more information on precompiling templates see + * [lodash's custom builds documentation](https://lodash.com/custom-builds). + * + * For more information on Chrome extension sandboxes see + * [Chrome's extensions documentation](https://developer.chrome.com/extensions/sandboxingEval). + * + * @static + * @since 0.1.0 + * @memberOf _ + * @category String + * @param {string} [string=''] The template string. + * @param {Object} [options={}] The options object. + * @param {RegExp} [options.escape=_.templateSettings.escape] + * The HTML "escape" delimiter. + * @param {RegExp} [options.evaluate=_.templateSettings.evaluate] + * The "evaluate" delimiter. + * @param {Object} [options.imports=_.templateSettings.imports] + * An object to import into the template as free variables. + * @param {RegExp} [options.interpolate=_.templateSettings.interpolate] + * The "interpolate" delimiter. + * @param {string} [options.sourceURL='lodash.templateSources[n]'] + * The sourceURL of the compiled template. + * @param {string} [options.variable='obj'] + * The data object variable name. + * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`. + * @returns {Function} Returns the compiled template function. + * @example + * + * // Use the "interpolate" delimiter to create a compiled template. + * var compiled = _.template('hello <%= user %>!'); + * compiled({ 'user': 'fred' }); + * // => 'hello fred!' + * + * // Use the HTML "escape" delimiter to escape data property values. + * var compiled = _.template('<%- value %>'); + * compiled({ 'value': '