AWaselnuk

function isInteger(num) {
  num === Math.round(num);
}

AWaselnuk

/* Sample JavaScript file added with ScriptTag resource. 
This sample file is meant to teach best practices.
Your app will load jQuery if it's not defined. 
Your app will load jQuery if jQuery is defined but is too old, e.g. < 1.7. 
Your app does not change the definition of $ or jQuery outside the app. 
*/

(function(){
  
/* Load Script function we may need to load jQuery from the Google's CDN */

AWaselnuk

// from: Eloquent JavaScript http://eloquentjavascript.net/08_error.html#p_CJKevweHV6

// Define our own error type
function InputError(message) {
  this.message = message;
  this.stack = (new Error()).stack;
}
InputError.prototype = Object.create(Error.prototype);
InputError.prototype.name = "InputError";

AWaselnuk

var str = 'A&P Grocers, Inc.';
str.replace(/\W/g, '').toLowerCase(); // apgrocersinc

AWaselnuk

function generateUUID(){
  var d = new Date().getTime();
  var uuid = 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
      var r = (d + Math.random()*16)%16 | 0;
      d = Math.floor(d/16);
      return (c=='x' ? r : (r&0x3|0x8)).toString(16);
  });
  return uuid;
};

AWaselnuk

// From: http://stackoverflow.com/questions/16425520/angularjs-test-that-an-external-script-is-effectively-loaded

(function waiter(){
  if(!window.jQuery){ return setTimeout(waiter, 37); }

  $("#myDiv").fadeOut();

}())

AWaselnuk

// Summary from http://www.sitepoint.com/what-is-this-in-javascript/



//// GLOBAL SCOPE

// If there's no current object, 'this' refers to the global object
window.WhoAmI = "I'm the window object"

console.log(window.WhoAmI) // "I'm the window object"

AWaselnuk

//this function will work cross-browser for loading scripts asynchronously
//from: http://stackoverflow.com/questions/7718935/load-scripts-asynchronously
function loadScript(src, callback)
{
  var s,t,done;
  done = false;
  s = document.createElement('script');
  s.type = 'text/javascript';
  s.src = src;
  s.onload = s.onreadystatechange = function() {

AWaselnuk

// BAD
setInterval(function(){
  doStuff();
}, 100);

// GOOD
(function loopMe(){
  doStuff();
  setTimeout(loopMe, 100);
})();

AWaselnuk

AllCops:
  Include:
    - '**/Rakefile'
    - '**/config.ru'
  Exclude:
    - 'db/**/*'
    - 'bin/**/*'
    - 'config/**/*'
    - 'node_modules/**/*'
    - '**/rails_helper.rb'