# bytes bytes module is made to provide helpers to manipulation of bytes slice. # usage All the following functions are exposed in `mod.ts` ## findIndex Find first index of binary pattern from given binary array. ```typescript import { findIndex } from "https://deno.land/std/bytes/mod.ts"; findIndex( new Uint8Array([1, 2, 0, 1, 2, 0, 1, 2, 0, 1, 3]), new Uint8Array([0, 1, 2]) ); // => returns 2 ``` ## findLastIndex Find last index of binary pattern from given binary array. ```typescript import { findLastIndex } from "https://deno.land/std/bytes/mod.ts"; findLastIndex( new Uint8Array([0, 1, 2, 0, 1, 2, 0, 1, 3]), new Uint8Array([0, 1, 2]) ); // => returns 3 ``` ## equal Check whether given binary arrays are equal to each other. ```typescript import { equal } from "https://deno.land/std/bytes/mod.ts"; equal(new Uint8Array([0, 1, 2, 3]), new Uint8Array([0, 1, 2, 3])); // returns true equal(new Uint8Array([0, 1, 2, 3]), new Uint8Array([0, 1, 2, 4])); // returns false ``` ## hasPrefix Check whether binary array has binary prefix. ```typescript import { hasPrefix } from "https://deno.land/std/bytes/mod.ts"; hasPrefix(new Uint8Array([0, 1, 2]), new Uint8Array([0, 1])); // returns true hasPrefix(new Uint8Array([0, 1, 2]), new Uint8Array([1, 2])); // returns false ``` ## repeat Repeat bytes of given binary array and return new one. ```typescript import { repeat } from "https://deno.land/std/bytes/mod.ts"; repeat(new Uint8Array([1]), 3); // returns Uint8Array(3) [ 1, 1, 1 ] ``` ## concat Concatenate two binary arrays and return new one. ```typescript import { concat } from "https://deno.land/std/bytes/mod.ts"; concat(new Uint8Array([1, 2]), new Uint8Array([3, 4])); // returns Uint8Array(4) [ 1, 2, 3, 4 ] ``` ## copyBytes Copy bytes from one binary array to another. ```typescript import { concat } from "https://deno.land/std/bytes/mod.ts"; const dst = new Uint8Array(4); const src = Uint8Array.of(1, 2, 3, 4); const len = copyBytes(src, dest); // returns len = 4 ```