Prototype

OBJECT

FUNCTIONS

ARRAYS

Function constructors 

(functions that are used

to create an objects)

var elephant = new Animal();

function Animal () {
	this.type = 'elephant';
	this.name = 'Cute';
	return 'hey';
}

typeof new Animal(); // Object
typeof Animal(); 	 // String

.prototype

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


var cat_obj = new Animal('Jake', 'Cat');
var dog_obj = new Animal('Doggy', 'Dog');

Animal.prototype.present_me = function() {
    return 'Hello i am ' + this.name + ' ' + this.type;
};

constructor convention

function Animal () {...}

function animal () {...}

Built-in constructors

use prototype to add method

Array object

var arr = ['one', 'two', 'three'];

for (var prop in arr) {
    console.log(prop + ': ' + arr[prop]);
}

Array.prototype.myprop = '100500';

for (var prop in arr) {
    console.log(prop + ': ' + arr[prop]);
}

Pure prototype inheritence

var group = {
    count: 21,
    method1: function() {
        return this.count;
    }
}

var group1 = Object.create(group);

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

Person.prototype.present = function() {
    console.log('Hello, I am ' + this.name);
}

function Men() {
    Person.apply(this, arguments);
    this.hobby = 'Football';
}

Men.prototype = Object.create(Person.prototype);
Men.prototype.constructor = Men;

Men.prototype.getDrunk = function() {
    console.log('Give me 10 beers, and lets go ' + this.hobby);
}

function Women() {
    Person.apply(this, arguments);
    this.color = 'red';
}

Women.prototype = Object.create(Person.prototype);
Women.prototype.constructor = Women;

Women.prototype.speak = function() {
    console.log('my favorite color is  ' + this.color);
}