singhkumarhemant

Useful Links

MDN JavaScript

23 Free JavaScript Books

A curated collection of awesome & free JavaScript books to help you learn the JavaScript programming language.

If you know of any other free JavaScript books that you think should be on this list, please let me know in the comments section and I will get them added.

singhkumarhemant

'use strict';

const crypto = require('crypto');

const ENCRYPTION_KEY = process.env.ENCRYPTION_KEY; // Must be 256 bits (32 characters)
const IV_LENGTH = 16; // For AES, this is always 16

function encrypt(text) {
 let iv = crypto.randomBytes(IV_LENGTH);
 let cipher = crypto.createCipheriv('aes-256-cbc', Buffer.from(ENCRYPTION_KEY), iv);

singhkumarhemant

Generating a new ssh-key

Open Terminal. Paste the text below, substituting in your GitHub email address.

ssh-keygen -t rsa -b 4096 -C "your_email@example.com"

This creates a new ssh key, using the provided email as a label

Generating public/private rsa key pair.

singhkumarhemant

const waitFor = (ms) => new Promise(r => setTimeout(r, ms))
const asyncForEach = async (array, callback) => {
  for (let index = 0; index < array.length; index++) {
    await callback(array[index], index, array)
  }
}

const start = async () => {
  await asyncForEach([1, 2, 3], async (num) => {
    await waitFor(50)

singhkumarhemant

function ensureJquery(readyCallback) {
    if (window.jQuery === undefined || parseFloat(window.jQuery.fn.jquery) < 1.9) {
        var js = document.createElement('script');
        js.src = "http://ajax.googleapis.com/ajax/libs/jquery/1.9.0/jquery.min.js";
        if (js.readyState)
            js.onreadystatechange = function () {
                if (this.readyState == 'complete' || this.readyState == 'loaded') {
                    jQueryLoadHandler();
                }
            };