A n ice singleton patten sample from Rick

gistfile1.txt

/**
 * A singleton object
 * 
 * Singleton objects are useful but use them sparingly.  By using singletons
 * you are creating dependencies in your software that might not be necessary. 
 * If you find yourself using this over and over again you probably need 
 * to rethink what you're doing.  Remember, in general, globals are bad.
 */
var Preferences = {
	fbToken: '1234',
	twToken: '1234',
	userData: {},
	updateUser: function() {},
	nukeProject: function() {}
};

/**
 * Alternative way of creating a singleton
 * using revealing module pattern
 */
 var Preferences = (function() {
	var fbToken = '1234',
		twToken = '1234',
		userData = {},
		updateUser = function() {},
		nukeProject = function() {};

	return {
		fbToken: fbToken,
		twToken: twToken,
		userData: userData,
		updateUser: updateUser,
		nukeProject: nukeProject
	}
 })();

 /**
 * Alternative way of creating a singleton
 * using normal module pattern
 */
 var Preferences = (function() {
 	var api = {};

	api.fbToken = '1234';
	api.twToken = '1234';
	api.userData = {};
	api.updateUser = function() {};
	api.nukeProject = function() {};

	return api;
 })();

console.log( Preferences );
console.log( Preferences.fbToken );
console.log( Preferences.twToken );