1// Copyright 2013 the V8 project authors. All rights reserved. 2// Redistribution and use in source and binary forms, with or without 3// modification, are permitted provided that the following conditions are 4// met: 5// 6// * Redistributions of source code must retain the above copyright 7// notice, this list of conditions and the following disclaimer. 8// * Redistributions in binary form must reproduce the above 9// copyright notice, this list of conditions and the following 10// disclaimer in the documentation and/or other materials provided 11// with the distribution. 12// * Neither the name of Google Inc. nor the names of its 13// contributors may be used to endorse or promote products derived 14// from this software without specific prior written permission. 15// 16// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 28function pluck1(a, key) { 29 return a.map(function(item) { return item[key]; }); 30}; 31assertArrayEquals([2, 2], pluck1([[0, 0], [0, 0]], 'length')); 32assertArrayEquals([1, 3], pluck1([[1, 2], [3, 4]], '0')); 33 34function pluck2(a, key) { 35 return a.map(function(item) { return item[key]; }); 36}; 37assertArrayEquals([2, 2], pluck2(["ab", "cd"], 'length')); 38assertArrayEquals(["a", "c"], pluck2(["ab", "cd"], '0')); 39 40function pluck3(a, key) { 41 return a.map(function(item) { return item[key]; }); 42}; 43f = function() { 1 }; 44f.prototype = g = function() { 2 }; 45assertArrayEquals([g, g], pluck3([f, f], 'prototype')); 46assertArrayEquals([undefined, undefined], pluck3([f, f], '0')); 47