import { Deno } from "https://deno.land/x/deno@v1.41.0/cli/tsc/dts/lib.deno.ns.d.ts";
const { fsyncSync } = Deno;
Synchronously flushes any pending data and metadata operations of the given file stream to disk.
const file = Deno.openSync(
"my_file.txt",
{ read: true, write: true, create: true },
);
Deno.writeSync(file.rid, new TextEncoder().encode("Hello World"));
file.truncateSync(1);
Deno.fsyncSync(file.rid);
console.log(Deno.readTextFileSync("my_file.txt")); // H