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28 lines
772 B
JavaScript
28 lines
772 B
JavaScript
// Copyright 2015 Microsoft Corporation. All rights reserved.
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// This code is governed by the license found in the LICENSE file.
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/*---
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description: Elements are updated after the call to from
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esid: sec-array.from
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---*/
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var array = [127, 4, 8, 16, 32, 64, 128];
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var arrayIndex = -1;
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function mapFn(value, index) {
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arrayIndex++;
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if (index + 1 < array.length) {
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array[index + 1] = 127;
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}
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assert.sameValue(value, 127, "Value mismatch in mapFn at index " + index + ".");
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assert.sameValue(index, arrayIndex, "Index mismatch in mapFn.");
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return value;
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}
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var a = Array.from(array, mapFn);
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assert.sameValue(a.length, array.length, "Length mismatch.");
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for (var j = 0; j < a.length; j++) {
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assert.sameValue(a[j], 127, "Element mismatch for mapped array.");
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}
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