michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: //-----------------------------------------------------------------------------
michael@0: var BUGNUMBER = 363040;
michael@0: var summary = 'Array.prototype.reduce application in array flattening';
michael@0: var actual = '';
michael@0: var expect = '';
michael@0: 
michael@0: 
michael@0: //-----------------------------------------------------------------------------
michael@0: test();
michael@0: //-----------------------------------------------------------------------------
michael@0: 
michael@0: function test()
michael@0: {
michael@0:   enterFunc ('test');
michael@0:   printBugNumber(BUGNUMBER);
michael@0:   printStatus (summary);
michael@0:  
michael@0:   function flatten(arr)
michael@0:   {
michael@0:     function op(partial, item)
michael@0:     {
michael@0:       if (item instanceof Array)
michael@0:         Array.prototype.push.apply(partial, flatten(item));
michael@0:       else
michael@0:         partial.push(item);
michael@0: 
michael@0:       return partial;
michael@0:     }
michael@0: 
michael@0:     return arr.reduce(op, []);
michael@0:   }
michael@0: 
michael@0:   expect = [1, 2, 3];
michael@0:   actual = flatten([1, 2, 3]);      // [1, 2, 3]
michael@0:   reportCompare(expect + '', actual + '', summary + ': ' + expect);
michael@0: 
michael@0:   expect = [1, 2, 3];
michael@0:   actual = flatten([1, [2], 3]);    // [1, 2, 3]
michael@0:   reportCompare(expect + '', actual + '', summary + ': ' + expect);
michael@0: 
michael@0:   expect = [2, 3];
michael@0:   actual = flatten([[], 2, 3]);     // [2, 3]
michael@0:   reportCompare(expect + '', actual + '', summary + ': ' + expect);
michael@0: 
michael@0:   expect = [1, 2, 3];
michael@0:   actual = flatten([[1], 2, 3]);    // [1, 2, 3]
michael@0:   reportCompare(expect + '', actual + '', summary + ': ' + expect);
michael@0: 
michael@0:   expect = [4];
michael@0:   actual = flatten([[[[4]]]]);      // [4]
michael@0:   reportCompare(expect + '', actual + '', summary + ': ' + expect);
michael@0: 
michael@0:   expect = [1, 2, 3];
michael@0:   actual = flatten([1, [2, [3]]]);  // [1, 2, 3]
michael@0:   reportCompare(expect + '', actual + '', summary + ': ' + expect);
michael@0: 
michael@0:   expect = [];
michael@0:   actual = flatten([[[[[]]]]]);     // []
michael@0:   reportCompare(expect + '', actual + '', summary + ': ' + expect);
michael@0: 
michael@0:   exitFunc ('test');
michael@0: }