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Last change
on this file since 6c1585f was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago |
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initial commit
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File size:
687 bytes
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| 1 | 'use strict';
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| 2 | var ArrayBufferViewCore = require('../internals/array-buffer-view-core');
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| 3 | var toLength = require('../internals/to-length');
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| 4 | var toInteger = require('../internals/to-integer');
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| 5 |
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| 6 | var aTypedArray = ArrayBufferViewCore.aTypedArray;
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| 7 | var exportTypedArrayMethod = ArrayBufferViewCore.exportTypedArrayMethod;
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| 8 |
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| 9 | // `%TypedArray%.prototype.at` method
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| 10 | // https://github.com/tc39/proposal-relative-indexing-method
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| 11 | exportTypedArrayMethod('at', function at(index) {
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| 12 | var O = aTypedArray(this);
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| 13 | var len = toLength(O.length);
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| 14 | var relativeIndex = toInteger(index);
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| 15 | var k = relativeIndex >= 0 ? relativeIndex : len + relativeIndex;
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| 16 | return (k < 0 || k >= len) ? undefined : O[k];
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| 17 | });
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