bytes module is made to provide helpers to manipulation of bytes slice.
All the following functions are exposed in mod.ts
Find first index of binary pattern from given binary array.
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
Find last index of binary pattern from given binary array.
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
Check whether given binary arrays are equal to each other.
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
Check whether binary array has binary prefix.
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 bytes of given binary array and return new one.
import { repeat } from "https://deno.land/std/bytes/mod.ts";
repeat(new Uint8Array([1]), 3); // returns Uint8Array(3) [ 1, 1, 1 ]
Concatenate two binary arrays and return new one.
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 ]
Copy bytes from one binary array to another.
import { copyBytes } 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