subarray() method returns a new TypedArray on the same
ArrayBuffer store and with the same element types as for this TypedArray object. The
begin offset is inclusive and the
end offset is exclusive. TypedArray is one of the typed array types.
The source for this interactive example is stored in a GitHub repository. If you'd like to contribute to the interactive examples project, please clone https://github.com/mdn/interactive-examples and send us a pull request.
- begin Optional
- Element to begin at. The offset is inclusive. The whole array will be included in the new view if this value is not specified.
- end Optional
- Element to end at. The offset is exclusive. If not specified, all elements from the one specified by
beginto the end of the array are included in the new view.
The range specified by
end is clamped to the valid index range for the current array; if the computed length of the new array would be negative, it's clamped to zero. If either
end is negative, it refers to an index from the end of the array instead of from the beginning.
Also note that this is creating a new view on the existing buffer; changes to the new object's contents will impact the original object and vice versa.
var buffer = new ArrayBuffer(8); var uint8 = new Uint8Array(buffer); uint8.set([1,2,3]); console.log(uint8); // Uint8Array [ 1, 2, 3, 0, 0, 0, 0, 0 ] var sub = uint8.subarray(0,4); console.log(sub); // Uint8Array [ 1, 2, 3, 0 ]
|ECMAScript Latest Draft (ECMA-262)
The definition of 'TypedArray.prototype.subarray' in that specification.
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