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 visits deleted element in array after the call when same index is also present in prototype ---*/ function callbackfn(val, idx, obj) { delete srcArr[4]; if (val > 0) return 1; else return 0; } Array.prototype[4] = 5; var srcArr = [1, 2, 3, 4, 5]; var resArr = srcArr.map(callbackfn); delete Array.prototype[4]; assert.sameValue(resArr.length, 5, 'resArr.length'); assert.sameValue(resArr[4], 1, 'resArr[4]');