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/**
 * A queue can remove only the  most recently added value, what if we need to remove old value. here comes another 
 * data structure QUEUE.
 * queue is work on FIRST IN FIRST OUT
 * 
 * queue is work on LAST IN FIRST OUT principle.
 * queue is just like array with only capabilities of push and pop (method).
 *          [6] 
 *          [5]
 *          [4]

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/** 
 * A stack is useful when we want to add data in sequential order and remove data. Based on its definition,
 * a stack can remove only the  most recently added data.
 * 
 * stack is work on LAST IN FIRST OUT principle.
 * stack is just like array with only capabilities of push and pop (method).
 *          [6] ----> which is last element of stack
 *          [5]
 *          [4]
 *          [3]

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/**
 * linked list is a linear data structure similar to an array. However, unlike arrays,
 *  elements are not stored in a particular memory location or index. Rather each element is a separate
 *  object that contains a pointer or a link to the next object in that list.
 * for ex: head--> [D, reference to next] [D, reference to next] [D, null] --> tail
 * D belongs to data.
 * The head is a reference to the first node in the linked list.
 * The last node on the list points to null. If a list is empty, the head is a null reference
 */

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/**
* Recurcively remove empty value, empty object.
* you can add more checks on line 12 as per your requirments 
**/

function removeEmpty(data) { 
  return Object.keys(data).reduce((accumulator, key) => {
    const isObject = typeof data[key] === 'object';
    const isDateTime = key === 'from_date_time' || key === 'to_date_time';
    const value = isObject ? this.removeEmpty(data[key]) : data[key];

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import { NgModule } from '@angular/core';
import { RouterModule, Routes } from '@angular/router';

const routes: Routes = [{
  path: 'home',
  component: HomeComponent,
  children: [
    { path: '', redirectTo: 'email', pathMatch: 'full', data: { title: 'Email' } },
    { path: 'email', component: EmailListComponent },

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public objectToFormData(request) {
  // create form data
  const newPostRequest: FormData = new FormData();
  
  Object.keys(request).forEach(x => {
    newPostRequest.append(x, request[x]);
  });
  
  return newPostRequest;

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<h2>{{remainingSeconds$ | async}}<>

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const scrape = require('website-scraper');
const websiteUrl = 'Website url you want to scrap';

scrape({
    urls: [websiteUrl],
    urlFilter: function (url) {
        return url.indexOf(websiteUrl) === 0;
    },
    recursive: true,
    maxDepth: 50,