// Copyright (c) 2012 Ecma International.  All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.

/*---
es5id: 15.4.4.18-7-c-ii-5
description: >
    Array.prototype.forEach - k values are accessed during each
    iteration and not prior to starting the loop on an Array
---*/

        var result = true;
        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) {
            //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") {
                    result = false;
                }
                kIndex[idx] = 1;
            } else {
                result = false;
            }
        }

        [11, 12, 13, 14].forEach(callbackfn, undefined);

assert(result, 'result !== true');
