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26 lines
791 B
TypeScript
26 lines
791 B
TypeScript
// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
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// This module is browser compatible.
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/** Returns true if the suffix array appears at the end of the source array,
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* false otherwise.
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*
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* The complexity of this function is O(suffix.length).
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*
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* ```ts
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* import { endsWith } from "https://deno.land/std@$STD_VERSION/bytes/ends_with.ts";
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* const source = new Uint8Array([0, 1, 2, 1, 2, 1, 2, 3]);
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* const suffix = new Uint8Array([1, 2, 3]);
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* console.log(endsWith(source, suffix)); // true
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* ```
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*/
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export function endsWith(source: Uint8Array, suffix: Uint8Array): boolean {
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for (
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let srci = source.length - 1, sfxi = suffix.length - 1;
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sfxi >= 0;
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srci--, sfxi--
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) {
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if (source[srci] !== suffix[sfxi]) return false;
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}
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return true;
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}
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