Prototypical Dinosaurs

constructor_with_prototype.js

function Dinosaur(color){   
  this.id = Dinosaur.prototype.counter++;
  this.dob = Date.now();
  this.color = color;
};

Dinosaur.prototype.roar = function(){
  console.log('RARWARARRR said the ' + this.color + ' Dinosaur!!!');
};

Dinosaur.prototype.counter = 1000;

var o = new Dinosaur('blue');
var reddy = new Dinosaur('red');

console.log(o);
console.log(reddy);

o.roar();
reddy.roar();