lap00zza

// +by shift left
// -by shift right
const shiftArray = (arr, by) => {
    const _by = (by | 0) % arr.length;
    const rest = by > 0 ? arr.slice(0, _by) : arr.slice(_by);
    return arr.map(
        (_, i) => arr[i + _by] !== undefined 
            ? arr[i + _by] 
            : rest.shift()
	);

lap00zza

const { spawn } = require("child_process");
const { Readable, Duplex, Writable } = require("stream");

const wrapRS = txt => {
    const r = new Readable();
    r._read = () => {
        r.push(txt);
        r.push(null);
    };
    return r;

lap00zza

/**
 * nanoWS
 * A very basic websocket client. Its does not fully cover rfc6455 so
 * it must not used for any real world work. I wrote it to find out
 * how websockets actually worked.
 *
 * @licence MIT
 * @author Jewel Mahanta <jewelmahanta@gmail.com>
 */