| /* -*- 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() |
| { |
| enterFunc ('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); |
| |
| exitFunc ('test'); |
| } |