Pseudoclassical instantiation

gistfile1.js

// This function does not return anything, but instead creates a new instance of an object with 
// the given attributes when the "new" keyword is used.
var Cat = function(){
  this.stomach = [];
};

// adds methods to the prototype for this new cat object
Cat.prototype.meow = function(){
  console.log("MEOWPURR");
};

Cat.prototype.eat = function(food){
  this.stomach.push(food);
};

// make that kitty
var kitty = new Cat();

kitty.meow(); // "MEOWPURR"
kitty.eat('tiny helpless birds');
console.log(kitty.stomach) // ["tiny helpless birds"]