1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
|
// Copyright (c) 2012 Ecma International. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-array.prototype.map
description: >
Array.prototype.map - k values are accessed during each iteration
and not prior to starting the loop.
---*/
var kIndex = [];
//By below way, we could verify that k would be setted as 0, 1, ..., length - 1 in order, and each value will be setted one time.
function callbackfn(val, idx, obj) {
//Each position should be visited one time, which means k is accessed one time during iterations.
if (typeof kIndex[idx] === "undefined") {
//when current position is visited, its previous index should has been visited.
if (idx !== 0 && typeof kIndex[idx - 1] === "undefined") {
return true;
}
kIndex[idx] = 1;
return false;
} else {
return true;
}
}
var testResult = [11, 12, 13, 14].map(callbackfn);
assert.sameValue(testResult.length, 4, 'testResult.length');
assert.sameValue(testResult[0], false, 'testResult[0]');
assert.sameValue(testResult[1], false, 'testResult[1]');
assert.sameValue(testResult[2], false, 'testResult[2]');
assert.sameValue(testResult[3], false, 'testResult[3]');
reportCompare(0, 0);
|
