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const removeProperties = ({
  password,
  blockExpires,
  loginAttempts,
  ...rest
}) => rest;

kadavre

Source : Learn to combine RxJs sequences with super intuitive interactive diagrams

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Merge

Concat

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$('p.descr').attr('unselectable', 'on')
.css('user-select', 'none')
.on('selectstart', false);

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// You want to parse this address into parts:
var url = 'http://tutorialzine.com/books/jquery-trickshots?trick=12#comments';
// The trick; create a new link with the url as its href:
var a = $('<a>',{ href: url });
console.log('Host name: ' + a.prop('hostname'));
console.log('Path: ' + a.prop('pathname'));
console.log('Query: ' + a.prop('search'));
console.log('Protocol: ' + a.prop('protocol'));
console.log('Hash: ' + a.prop('hash'));

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// Old way
console.log($('#elem').length == 1 ? "exists!" : "doesn't exist!");
// The trick:
jQuery.fn.exists = function(){ return this.length > 0; }
console.log($('#elem').exists() ? "exists!" : "doesn't exist!");

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var route = {
_routes : {}, // The routes will be stored here
add : function(url, action){
this._routes[url] = action;
},
run : function(){
jQuery.each(this._routes, function(pattern){
if(location.href.match(pattern)){
// "this" points to the function to be executed
this();

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// with jQuery
$(document).ready(function(){ /* ... */ });
// shorter jQuery version
$(function(){ /* ... */ });
// without jQuery (doesn't work in older IEs)
document.addEventListener('DOMContentLoaded', function(){
// your code goes here
}, false);
// and here's the trick (works everywhere):
r(function(){

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var equalizeHeights = function () {
    $(".equalizer").each(function(ix, el) {
      var heights = $(el).find('.eq-watch').map(function() {
          return $(this).height();
      }).get();
      maxHeight = Math.max.apply(null, heights);
      $(el).find('.eq-watch').height(maxHeight);
    });
  };

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(function() {
  var results;
  this.assert = function assert(value, desc) {
    var li = document.createElement("li");
    li.className = value ? "pass" : "fail";
    li.appendChild(document.createTextNode(desc));
    results.appendChild(li);
    if (!value) {
      li.parentNode.parentNode.className = "fail";
    }

kadavre

function getAjaxPromise (url) {
  return new Promise(function (resolve, reject) {
    var xhttp = new XMLHttpRequest();
    xhttp.open('GET', url, true);
    xhttp.onload = function () {
      if (xhttp.status == 200) {
        resolve(JSON.parse(xhttp.response));
      } else {
        reject(xhttp.statusText);
      }