icodesido

var nodes = document.getElementsByTagName('*');
for (var i = nodes.length - 1; i >= 0; i--) {
   nodes[i].addEventListener('click', function() {
      console.log('You clicked element #' + i);
   });
}

var nodes = document.getElementsByTagName('*');
for (var i = nodes.length - 1; i >= 0; i--) {
   nodes[i].addEventListener('click', (function(i) {

icodesido

(function($){
    $.fn.yourPluginName = function(){
        // Your code goes here
        return this;
    };
})(jQuery);

icodesido

 var x = ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p'],
        y = [];

for (var i = 0; i < x.length; i++) {
  y[y.length] = x[i];
}

icodesido

var x = 0;

// this will toggle between 0 and 1 everytime is reset 
x ^= 1;

icodesido

[].forEach.call($$("*"),function(a){
  a.style.outline="1px solid #"+(~~(Math.random()*(1<<24))).toString(16)
})

icodesido

var re = /(\w+)\s(\w+)/;
var str = "John Smith";
var newstr = str.replace(re, "$2, $1");
console.log(newstr);

icodesido

prices = jQuery('#item-page-wrapper .price-section .a-color-price').text()
prices = prices.replace(/\s/g,'').split('£');
total = 0; 
var v;
for(var i = 0; i < prices.length; i++) {
v = parseFloat(prices[i]);
if (!isNaN(v)) total += v;
} 

icodesido

$.getJSON('/my/url', function(data) {

});

vs

request = new XMLHttpRequest();
request.open('GET', '/my/url', true);

request.onload = function() {

icodesido

function makeId()
{
    var txt = "",
        rand = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";

    for (var i = 5; i >= 0; i--) {
        txt += rand.charAt(Math.floor(Math.random() * rand.length));
    }
    
    return txt;

icodesido

var twice_37 = 0;

$(document).on('keydown', function( e ){
  var key = e.which;  
  if(key==37){

    twice_37 += 1; // almost :)   

    if(twice_37==2){
      alert('Do something! you pressed twice left!');