revealing-module.js

//the variable "oversimplifiedModule" gets assigned the return value of the anonymous and self executing function
var oversimplifiedModule = (function(){	
	//"private" variables are declared within the scope of the anonymous function: "counter" will not be in the global scope.
	var counter = 42;

	//the return value of the anonymous function can be considered the modules "public" interface
	return {
		incrementCounter: function(){
			//because we refer to "counter", which is in the outer scope, inside this inner scope, a closure is formed, which keeps a reference to "counter"
			//and prevents it from being garbage collected. closures are very neat and useful.
			counter++;
		},
		printCounter:function(){
			//just an example of another "public" member
			console.log(counter);
		}
	};	
})();