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.every description: > Array.prototype.every - k values are accessed during each iteration and not prior to starting the loop on an Array ---*/ var called = 0; var kIndex = []; //By below way, we could verify that k would be setted as 0, 1, ..., length - 1 in order, and each value will be setted one time. function callbackfn(val, idx, obj) { called++; //Each position should be visited one time, which means k is accessed one time during iterations. if (typeof kIndex[idx] === "undefined") { //when current position is visited, its previous index should has been visited. if (idx !== 0 && typeof kIndex[idx - 1] === "undefined") { return false; } kIndex[idx] = 1; return true; } else { return false; } } assert([11, 12, 13, 14].every(callbackfn, undefined), '[11, 12, 13, 14].every(callbackfn, undefined) !== true'); assert.sameValue(called, 4, 'called');