inherits function ( from https://github.com/nodejs/node-v0.x-archive/blob/master/lib/util.js#L634-L644), OOP classical pattern example

inherits.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.logName = function() {
  console.log("hi, I'm " + this.name);
}

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




var Friend = function(name, hobby) {
  Friend.super_.call(this, name);
  this.hobby = hobby;
}

inherits(Friend, Person);



Friend.prototype.getHobby = function() {
  console.log(this.hobby);
}
Friend.prototype.logName = function() {
  console.log("Hello, I'm " + this.name);
}


var veronica = new Friend("veronica", "dancing");