Simple Javascript singleton example

singleton.js

/*
 * Simple Javascript singleton example
 */

var Printer = function () {
    // Object stateless code here
    var counter = 0;

    //counter is useless here
    this.print("[" + counter++ + "] String to print!");
};

(function () {
    // Object state code here
    var counter = 0;

    this.print = function (str) {
        console.log("[" + counter++ + "] Printing...");
        console.log(str);
    };
}).call(Printer.prototype);

// each instance will keep the previous state
new Printer();