Config singleton

gistfile1.js

define(function() {

	// Config object
	var Config = function( initialSettings ) {
		var store = (initialSettings && typeof initialSettings === 'object') ? initialSettings : {};

		return {
			get: function( key ) {
				if(key) return store[key];
				return store;
			},
			set: function( key, value ) {
				store[key] = value;
			},
			has: function( key ) {
				return store[key] ? true : false;
			}
		};
	};

	// save instance so any further calls to config()
	// return the same instantiated config object.
	var instance = null;

	return function( initialSettings ) {
		if(instance === null) instance = new Config( initialSettings );
		return instance;
	};
});