Patrones basicos js

gistfile1.js

//clase tipica

var Dog = function(name) {
    this.name = name;
};
Dog.prototype.legs = 4;
Dog.prototype.speak = function() {
    return "Un perro de " + this.legs + " patas llamado " + this.name + " dice guau!";
};


//closure factory
var newDog = function(name) {

    var legs = 4;
    return {
        speak: function() {
            return "Un perro de " + legs + " patas llamado " + name + " dice guau!";
        }
    };
};

//singleton
var System = {
    prop: null,
    dog: null,
    charlie: null,
    init: function() {
        prop = "test";
        dog = new Dog('Hoover');
        charlie = newDog('Charlie');
    },
    print: function() {
        console.log(prop);
        console.log(dog.speak());
        console.log(charlie.speak());
    }

};


// functiones autoejecutables
engine = (function(p) {
    (p.setup = function() {
        System.init();
    }());
    (p.dr = function() {
        System.print(p);
    }());

}({}));