import { Deno } from "https://deno.land/x/deno@v1.28.1/cli/dts/lib.deno.ns.d.ts";
const { fsync } = Deno;
Flushes any pending data and metadata operations of the given file stream to disk.
const file = await Deno.open(
"my_file.txt",
{ read: true, write: true, create: true },
);
await Deno.write(file.rid, new TextEncoder().encode("Hello World"));
await Deno.ftruncate(file.rid, 1);
await Deno.fsync(file.rid);
console.log(new TextDecoder().decode(await Deno.readFile("my_file.txt"))); // H