// Create Object
var person = {
  name: 'Bob',
  age: 21,
  bio: function() {
    consoloe.log("Hi, I'm Bob");
  };
};

function Person(name, age) {
  this.name = name
  this.age = age;
  this.bio: function() {
    consoloe.log("Hi, I'm Bob");
  };
 };
}

// Create Object
var bob = new Person('Bob', 20);

// Create Object
var person = new Object();

person.name = 'Bob';
person['age'] = 21;
person.greeting = function() {
  consoloe.log("Hi, I'm Bob");
};

// Create Object
var person = new Object({
  name: 'Bob',
  age: 21,
  greeting: function() {
    consoloe.log("Hi, I'm Bob");
  }
});

function Animal(name) {
    this.name = name;
}

Animal.prototype.sleep = function() {
    console.log(this.name + ': Zzz...');
}

function Dog(name) {
    this.name = name;
}

// Create a reference for the prototype
Dog.prototype = Object.create(new Animal());

function Person(name, age) {
    this.name = name;
    this.age = age;
    this.greet = function() {
      console.log("Hi, I'm Bob")
    }
};

Person.prototype.introduce = function() {
  console.log("Hi, I'm Bob")
};

// Create Object
let bob = Person("Bob", 21)
bob.greet() // "Hi, I'm Bob"
bob.introduce() // "Hi, I'm Bob"

var Parent = function() {
    this.name = "Paremt";
}

Parent.prototype.print = function() {
    console.log(this.name);
}

var parent = new Parent();

parent.print(); // "Parent"

var Child = function() {
    this.name = "Child";
    this.initial = "Jr.";
}

var inheritsFrom = function (child, parent) {
    child.prototype = Object.create(parent.prototype);
};

inheritsFrom(Child, Parent);

var son  = new Child();
son.print(); // "Child"

Child.prototype.print = function() {
    Parent.prototype.print.call(this);
    console.log(this.initial);
}

son.print() // "Jr."

var GrandChild = function() {
    this.name = "Grand Child";
    this.initial = "JrJr.";
}

inheritsFrom(GrandChild, Child);

GrandChild.prototype.dance = function() {
  console.log("Let me dance for you, Bob")
}

GrandChild.prototype.print = function () {
    Child.prototype.print.call(this);
    console.log(this.initial);
}

var grandChild = new GrandChild();
grandChild.print(); // "JrJr."

function Product(name, price) {
  this.name = name;
  this.price = price;
}

function Food(name, price) {
  Product.call(this, name, price);
  this.category = 'food';
}

function Toy(name, price) {
  Product.call(this, name, price);
  this.category = 'toy';
}

var cheese = new Food('feta', 5);
var fun = new Toy('robot', 40);

function greet() {
  var reply = [this.person, 'is a', this.role].join(' ');
  console.log(reply);
}

var i = {
  person: 'Bob', 
  role: 'Javascript Developer'
};

greet.call(i); // Bob is a Javascript Developer

this.x = 9;    // this refers to global "window" object here in the browser
var module = {
  x: 81,
  getX: function() { return this.x; }
};

module.getX(); // 81

var retrieveX = module.getX;
retrieveX();   
// returns 9 - The function gets invoked at the global scope
var boundGetX = retrieveX.bind(module);
boundGetX(); // 81

( new Foo ).__proto__ === Foo.prototype
( new Foo ).prototype === undefined

function Point(x, y) {
    this.x = x;
    this.y = y;
}

var myPoint = new Point();

// the following are all true
myPoint.__proto__ == Point.prototype
myPoint.__proto__.__proto__ == Object.prototype
myPoint instanceof Point;
myPoint instanceof Object;