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
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
|
/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
/* 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/. */
//-----------------------------------------------------------------------------
var BUGNUMBER = 363040;
var summary = 'Array.prototype.reduce application in array flattening';
var actual = '';
var expect = '';
//-----------------------------------------------------------------------------
test();
//-----------------------------------------------------------------------------
function test()
{
printBugNumber(BUGNUMBER);
printStatus (summary);
function flatten(arr)
{
function op(partial, item)
{
if (item instanceof Array)
Array.prototype.push.apply(partial, flatten(item));
else
partial.push(item);
return partial;
}
return arr.reduce(op, []);
}
expect = [1, 2, 3];
actual = flatten([1, 2, 3]); // [1, 2, 3]
reportCompare(expect + '', actual + '', summary + ': ' + expect);
expect = [1, 2, 3];
actual = flatten([1, [2], 3]); // [1, 2, 3]
reportCompare(expect + '', actual + '', summary + ': ' + expect);
expect = [2, 3];
actual = flatten([[], 2, 3]); // [2, 3]
reportCompare(expect + '', actual + '', summary + ': ' + expect);
expect = [1, 2, 3];
actual = flatten([[1], 2, 3]); // [1, 2, 3]
reportCompare(expect + '', actual + '', summary + ': ' + expect);
expect = [4];
actual = flatten([[[[4]]]]); // [4]
reportCompare(expect + '', actual + '', summary + ': ' + expect);
expect = [1, 2, 3];
actual = flatten([1, [2, [3]]]); // [1, 2, 3]
reportCompare(expect + '', actual + '', summary + ': ' + expect);
expect = [];
actual = flatten([[[[[]]]]]); // []
reportCompare(expect + '', actual + '', summary + ': ' + expect);
}
|
