Classical javascript inheritance

classical_inheritance.js

// Classical prototypal inheritance

// This function comes from Node.js
function inherits(ctor, superCtor) {
  ctor.super_ = superCtor;
  ctor.prototype = Object.create(superCtor.prototype, {
    constructor: {
      value: ctor,
      enumerable: false,
      writable: true,
      configurable: true
    }
  });
};

var Person = function (name) {
  this.name = name;
}

Person.prototype.sayName = function () {
  console.log("Hi my name is " + this.name);
};

Person.prototype.shoutName = function () {
  console.log("Hi my name is " + this.name + "!!");
};

var john = new Person("john");
var bobby = new Person("bobby");

var Musician = function (name, instrument) {
  Musician.super_.call(this, name);
  this.instrument = instrument;
}

inherits(Musician, Person);

Musician.prototype.getInstrument = function () {
  console.log(this.instrument);
};

Musician.prototype.shoutName = function () {
  console.log("DUDE! My name is " + this.name + "!!!!");
};

var julia = new Musician("julia", "trombone");
julia.sayName();
julia.getInstrument();