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std/bytes/starts_with.ts

The Deno Standard Library
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// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.// This module is browser compatible.
/** Returns true if the prefix array appears at the start of the source array, * false otherwise. * * The complexity of this function is O(prefix.length). * * ```ts * import { startsWith } from "https://deno.land/std@$STD_VERSION/bytes/starts_with.ts"; * const source = new Uint8Array([0, 1, 2, 1, 2, 1, 2, 3]); * const prefix = new Uint8Array([0, 1, 2]); * console.log(startsWith(source, prefix)); // true * ``` */export function startsWith(source: Uint8Array, prefix: Uint8Array): boolean { for (let i = 0; i < prefix.length; i++) { if (source[i] !== prefix[i]) return false; } return true;}