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rgrove

YUI.add('multi', function (Y) {

/**
Loads different versions of YUI in sandboxed iframes and makes them available
for use in the parent frame by exposing them as properties on a `Y.Multi`
instance.

This is primarily intended to be used for testing. You probably shouldn't use it
for anything real.

max-mapper

Put a closure on it

Sometimes you'll have objects that manage state along with event handling. This happens frequently in MVC apps. Let's start with a messy example:

var Launcher = function(rocket) {
  this.rocket = rocket
}

Launcher.prototype.isReady = function() {

Gozala

// Lack of tail call optimization in JS
var sum = function(x, y) {
  return y > 0 ? sum(x + 1, y - 1) :
         y < 0 ? sum(x - 1, y + 1) :
         x
}

sum(20, 100000) // => RangeError: Maximum call stack size exceeded

// Using workaround

andyhd

function maybe(value) {
  var obj = null;
  function isEmpty() { return value === undefined || value === null }
  function nonEmpty() { return !isEmpty() }
  obj = {
    map: function (f) { return isEmpty() ? obj : maybe(f(value)) },
    getOrElse: function (n) { return isEmpty() ? n : value },
    isEmpty: isEmpty,
    nonEmpty: nonEmpty
  }

kara-ryli

YUI().use("singleton-class", function (Y) {
  var instance1 = new Y.SingletonClass(),
      instance2 = new Y.SingletonClass();
  
  Y.log(instance1 === instance2); // true!

  window.instance1 = instance1;

});
YUI().use("singleton-class", function (Y) {

avalanche123

:+1:
:-1:
:airplane:
:art:
:bear:
:beer:
:bike:
:bomb:
:book:
:bulb:

penguinboy

var flattenObject = function(ob) {
	var toReturn = {};
	
	for (var i in ob) {
		if (!ob.hasOwnProperty(i)) continue;
		
		if ((typeof ob[i]) == 'object') {
			var flatObject = flattenObject(ob[i]);
			for (var x in flatObject) {
				if (!flatObject.hasOwnProperty(x)) continue;