ansarisufiyan777

function Parent(name, address) {
  this.fatherName = name || "unknown";
  this.fatherAddress = address || "Unknown";
}

Parent.prototype.PrintParent = function () {
  console.log("In Parent",this);
}
console.log("Creating child")

ansarisufiyan777

var stack = [];
/**
 * get empty object node
 */
function getObj() {
  return {
    data: null,
    isleft: true,
    left: null,

ansarisufiyan777

//prototype design patterns
exports.RunPrototype = () => {
  TeslaModels = function () {
    this.numWheels = 4;
    this.manufacturer = 'Tesla';
    this.make = 'Model S';
  }
  TeslaModels.prototype = function () {

    var go = function () {

ansarisufiyan777

//Module design patterns
exports.RunModular = () => {
  Employee = (() => {
    var emp = [];
    console.log("Modular Pattern:", this)
    
    // I am private
    function privateFunction() {
      console.log("Private function")
    }

ansarisufiyan777

exports.RunObserver = () => {
  /**
   * Subject could be anything, Whatsapp group, Circket feed, news letter 
   * notification
   */
  var Subject = function () {
    //List of subscribers
    this.observers = [];
    return {

ansarisufiyan777

exports.RunSingleton = function () {
  Printer = (() => {
    let instance = null;
    function createPrinter() {
      function print() {
        console.log("Print function", this);
      }
      function stop() {
        console.log("Stop printer", this);
      }

ansarisufiyan777

//npm install bluebird
//npm install net

var net = require('net');
var Promise = require('bluebird');

function checkConnection(host, port, timeout) {
    return new Promise(function(resolve, reject) {
        timeout = timeout || 10000;     // default of 10 seconds
        var timer = setTimeout(function() {