ishwarrimal

//A basic doubly linked list structure
class Node {
    constructor(val,prev = null, next = null){
        this.val = val;
        this.prev = prev;
        this.next = next;
    }

}

ishwarrimal

/**
 * lazyLoader
 * Check for elements in the document to be loaded later when visible to the user.
 * @see https://developers.google.com/web/fundamentals/performance/lazy-loading-guidance/images-and-video/
 * @example
 *   <element src="" data-src="/url/" data-srcset="..." />
 */
(function (ready) {
    if (document.readyState === "complete" || document.readyState === "interactive") {

ishwarrimal

{
    let Singleton = (function(){
        let instance;
        let createInstance = ()=>{
            let obj = {name: new Date()}
            return obj;
        }

        return {
            getInstance : () => {

ishwarrimal

let setTimer = null
let debounce = (cb, delay) => {
    clearTimeout(setTimer)
    setTimer = setTimeout(cb, delay);
}

ishwarrimal

export function throttle(callback, delay, options = {}) {
    let flag = true
    return () => {
        if (flag) {
            flag = false
            setTimeout(() => {
                callback(options)
                flag = true
            }, delay)
        }

ishwarrimal

function Queue() {
  this.length = 0;
}

Queue.prototype.push = function (item) {
  var node = {item: item};
  if (this.last) {
    this.last = this.last.next = node;
  } else {
    this.last = this.first = node;

ishwarrimal

 function GetValue1(){
  this.value = 10;
   // using regular funciton to access the varialbe `this.value`
  var printValue = function(){
    // Since printValue is an independent funciton and not a property of the GetValue1 constructor, 
    // so when this is called as constructor, printValue points to globalScopr
    // where in case of reguar funciton call, this will bound to the execution context of GetValue1
    console.log('The value of this.value is, ', this.value) //consoles 20
  } 
  printValue()