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33 lines
985 B
JavaScript
33 lines
985 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: >
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Elements deleted after the call started and before visited are not
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visited
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esid: sec-array.from
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---*/
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var originalArray = [0, 1, -2, 4, -8, 16];
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var array = [0, 1, -2, 4, -8, 16];
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var a = [];
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var arrayIndex = -1;
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function mapFn(value, index) {
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this.arrayIndex++;
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assert.sameValue(value, array[this.arrayIndex], "Value mismatch in mapFn at index " + index + ".");
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assert.sameValue(index, this.arrayIndex, "Index mismatch in mapFn.");
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array.splice(array.length - 1, 1);
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return 127;
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}
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a = Array.from(array, mapFn, this);
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assert.sameValue(a.length, originalArray.length / 2, "Length mismatch. Old array : " + (originalArray.length / 2) + ". array : " + a.length + ".");
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for (var j = 0; j < originalArray.length / 2; j++) {
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assert.sameValue(a[j], 127, "Element mismatch for mapped array at index " + j + ".");
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}
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