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30 lines
708 B
TypeScript
30 lines
708 B
TypeScript
// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
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// This module is browser compatible.
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/**
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* Concatenate an array of {@linkcode Uint8Array}s.
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*
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* @example
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* ```ts
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* import { concat } from "https://deno.land/std@$STD_VERSION/bytes/concat.ts";
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*
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* const a = new Uint8Array([0, 1, 2]);
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* const b = new Uint8Array([3, 4, 5]);
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* concat([a, b]); // Uint8Array(6) [ 0, 1, 2, 3, 4, 5 ]
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* ```
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*/
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export function concat(buf: Uint8Array[]): Uint8Array {
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let length = 0;
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for (const b of buf) {
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length += b.length;
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}
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const output = new Uint8Array(length);
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let index = 0;
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for (const b of buf) {
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output.set(b, index);
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index += b.length;
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}
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return output;
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}
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