Copy bytes from the src array to the dst array. Returns the number of bytes copied.

If the src array is larger than what the dst array can hold, only the amount of bytes that fit in the dst array are copied.

An offset can be specified as the third argument that begins the copy at that given index in the dst array. The offset defaults to the beginning of the array.

import { copy } from "https://deno.land/std@0.181.0/bytes/copy.ts";
const src = new Uint8Array([9, 8, 7]);
const dst = new Uint8Array([0, 1, 2, 3, 4, 5]);
console.log(copy(src, dst)); // 3
console.log(dst); // [9, 8, 7, 3, 4, 5]

import { copy } from "https://deno.land/std@0.181.0/bytes/copy.ts";
const src = new Uint8Array([1, 1, 1, 1]);
const dst = new Uint8Array([0, 0, 0, 0]);
console.log(copy(src, dst, 1)); // 3
console.log(dst); // [0, 1, 1, 1]