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- 'use strict';
- var ArrayBufferViewCore = require('../internals/array-buffer-view-core');
- var toLength = require('../internals/to-length');
- var toAbsoluteIndex = require('../internals/to-absolute-index');
- var speciesConstructor = require('../internals/species-constructor');
-
- var aTypedArray = ArrayBufferViewCore.aTypedArray;
- var exportTypedArrayMethod = ArrayBufferViewCore.exportTypedArrayMethod;
-
- // `%TypedArray%.prototype.subarray` method
- // https://tc39.es/ecma262/#sec-%typedarray%.prototype.subarray
- exportTypedArrayMethod('subarray', function subarray(begin, end) {
- var O = aTypedArray(this);
- var length = O.length;
- var beginIndex = toAbsoluteIndex(begin, length);
- return new (speciesConstructor(O, O.constructor))(
- O.buffer,
- O.byteOffset + beginIndex * O.BYTES_PER_ELEMENT,
- toLength((end === undefined ? length : toAbsoluteIndex(end, length)) - beginIndex)
- );
- });
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