Strict mode Passingnon-Strict mode Passing
Features:
- ∅
// 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 - value of returned array element can be changed or deleted ---*/ function callbackfn(val, idx, obj) { return true; } var obj = { 0: 11, 1: 9, length: 2 }; var newArr = Array.prototype.map.call(obj, callbackfn); var tempVal = newArr[1]; delete newArr[1]; assert.notSameValue(tempVal, undefined, 'tempVal'); assert.sameValue(newArr[1], undefined, 'newArr[1]');