import { copy } from "https://deno.land/std@0.199.0/streams/mod.ts";
Copies from src to dst until either EOF (null) is read from src or
an error occurs. It resolves to the number of bytes copied or rejects with
the first error encountered while copying.
import { copy } from "https://deno.land/std@0.199.0/streams/copy.ts";
const source = await Deno.open("my_file.txt");
const bytesCopied1 = await copy(source, Deno.stdout);
const destination = await Deno.create("my_file_2.txt");
const bytesCopied2 = await copy(source, destination);