Instantiation patterns and the keyword 'this'.

this.js

// functional instatiation
var FunctionalCat = function(name){
  var result = {};
  result.name = name;
  result.sayHi = function(){
    console.log(`Meow, my name is ${this.name}, the cat.`);
  }
  return result;
};

var cat = FunctionalCat('Gabe');
cat.sayHi();

// shared functional
var catMethods = {
  sayHi: function(){
    console.log(`Meow, my name is ${this.name}, the cat.`);
  }
};

var extend = function(methods, obj){
  for(var key in methods) obj[key] = methods[key];
};

var SharedFunctionalCat = function(name){
  var result = {};
  result.name = name;
  extend(catMethods, result);
  return result;
};

var cat = SharedFunctionalCat('Goldie');
cat.sayHi();

// prototypal
var catMethods = {
  sayHi: function(){
    console.log(`Meow, my name is ${this.name}, the cat.`);
  }
};

var PrototypalCat = function(name){
  var result = Object.create(catMethods);
  result.name = name;
  return result;
};

var cat = PrototypalCat('rp3')
cat.sayHi();

// inheritance
var tigerMethods = Object.create(catMethods, {
  roar: function(){ console.log(this.size ? 'ROAR' : 'squeak'); }
});

var ProtoTiger = function(name, size){
  var result = Object.create(tigerMethods);
  result.size = size;
  result.name = name;
  return result;
}

// pseudoclassical
var ClassicalCat = function(name){
  // var this = Object.create(ClassicalCat.prototype);
  this.name = name;
  // return this;
};

ClassicalCat.prototype.sayHi = function(){
    console.log(`Meow, my name is ${this.name}, the cat.`);
};

var cat = new ClassicalCat('George');
cat.sayHi();

// inheritance
var ClassicalTiger = function(name, size){
  ClassicalCat.call(this, name);
  this.size = size;
};

ClassicalTiger.prototype.roar = function(){
  console.log(this.size ? 'ROAR' : 'squeak');
};

// discuss what 'this' is
// discuss what 'call' does. 
// what about 'apply'?
// when is this useful or mandatory?

// how do you get the 'type' of an object in js?
// how you access the arguments passed to a function in js?

// beast mode, lets write a curry in JS!