Prototypal instantiation

gistfile1.js

// Creates a basic cat with meow and eat methods, then creates a kitten object that inherits from

// Makes cats with meow and eat methods, plus a stomach (just for hairballs)
var makeCat = function(name){
  var cat = Object.create(catMethods);
  cat.stomach = [];

  return cat;
};

var catMethods = {
  
  meow: function(){
    console.log("MEOW");
  },
  
  eat: function(food){
    this.stomach.push(food);
  }

};


// make a kitten that does everything a cat does, but can also play with yarn.
var makeKitten = function(){
  // Macig! The kitten inherits all methods from the parent cat
  var kitten = Object.create(cat);
  
  kitten.play = function(){
    console.log('*chases ball of yarn*');
  };
  
  return kitten;
}
// Make a cat! meowpurr
var cat = makeCat();

// make a kitten! 
var kitty = makeKitten();

// kitty can eat, meow, and play
kitty.eat('fingers')
console.log(kitty.stomach) // ["fingers"]

kitty.play() // *chases ball of yarn*