//////////////////////////
        //   definition
        //////////////////////////

        //class definition

        function Programmer(name, favoriteLanguage){
           //object properties
           this.name = name;
           this.favoriteLanguage = favoriteLanguage;
        }

        // Add methods
        Programmer.prototype.presentHimself = function(){
            console.info("Hi, my name is " + this.name + ", I love programming " + this.favoriteLanguage);
        };

        //////////////////////////
        //   instance, use...
        //////////////////////////
        // Instantiate new objects
        var JavascriptProgrammer = new Programmer("ECMA", "Javascript");

        // Invoke methods like this
        JavascriptProgrammer.presentHimself(); // logs info in console : "Hi, my name is ECMA, I love programming Javascript"