Javascript: Namespacing with the Module Pattern

gistfile1.js

// http://javascriptweblog.wordpress.com/2010/12/07/namespacing-in-javascript/
/* Namespacing - The Module Pattern */

var myApp = (function () {
    var id = 0;

    return {
        next: function () {
            return id++;
        },
        reset: function () {
            id = 0;
        }
    };
})();

console.log(myApp.next(), myApp.next(), myApp.reset(), myApp.next());
// 0 1 undefined 0 

"The logic is shielded from the global scope by a function wrapper (usually self-invoking) which returns an object representing the module’s public interface. By immediately invoking the function and assigning the result to a namespace variable, we lock up the module’s API in the namespace. Additionally any variables not included in the return value will remain forever private, visible only to the public functions that reference them."