import { Buffer } from "https://deno.land/x/deno@v1.39.0/ext/node/polyfills/buffer.ts";
Reads a signed 8-bit integer from buf at the specified offset.
Integers read from a Buffer are interpreted as two's complement signed values.
import { Buffer } from "ext:deno_node/internal/buffer";
const buf = Buffer.from([-1, 5]);
console.log(buf.readInt8(0));
// Prints: -1
console.log(buf.readInt8(1));
// Prints: 5
console.log(buf.readInt8(2));
// Throws ERR_OUT_OF_RANGE.