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<!doctype html>
<html>
<head>
<title>Javascript 202</title>
<link rel="stylesheet" href="style.css"/>
</head>
<body>
<div id="console"></div>
<table id="slideBoard" style="display: none">
<tr><td align="center" valign="center">
    
</td></tr>
</table>
<script src="jquery.js"></script>
<script src="jquery.console.js"></script>
<script id="slides" type="text/slides">
//Javascript 202

//Previously...

//Javascript != Java

//Closure == <br/> ((Double Rainbow))

//Functions as Methods

//Today

//Arrays

//Object-Oriented<br/>
//Programming

//DOM API

//Arrays

[1, 2, 3, 4]

Array(1, 2, 3, 4)

new Array(1, 2, 3, 4)

new Array(25)

['a', 2, {'c': 3}, [4], null]

var arr = [1, 2, 3, 4]

arr[0]

arr[1]

arr.length

arr[5] = 5

arr.length

arr.push(6)

arr

arr.pop()

arr

arr.unshift(0)

arr

arr.concat([7, 8, 9])

arr.join(':')

arr.slice(2)

arr.slice(2, 4)

arr.slice(0) // make a copy

arr.splice(2, 1, 8, 9)

//Gotcha: Array sort()

[1, 3, 10, 25].sort()

[1, 3, 10, 25].sort(function(a, b){
    return a - b
})

//&lt;/Arrays&gt;

//OOP in Javascript

//POLL: You know OOP?

//POLL: Is Javascript OOP?

//Some History

//1970s

//Xerox PARC

//Alan Kay

//Smalltalk

//Popularized OOP

//Classical Inheritance

//<pre><code>class Cat < Animal
// def initialize(name)
// @name = name
// end
//
// def speak()
// return "#{@name} sez MEOW!"
// end
//end</code></pre>

//<pre><code><span class="hilite">class Cat</span> < Animal
// def initialize(name)
// @name = name
// end
//
// def speak()
// return "#{@name} sez MEOW!"
// end
//end</code></pre>

//<pre><code>class Cat < <span class="hilite">Animal</span>
// def initialize(name)
// @name = name
// end
//
// def speak()
// return "#{@name} sez MEOW!"
// end
//end</code></pre>

//<pre><code>class Cat < Animal
// def initialize(name)
// <span class="hilite">@name</span> = name
// end
//
// def speak()
// return "#{<span class="hilite">@name</span>} sez MEOW!"
// end
//end</code></pre>

//<pre><code>class Cat < Animal
// def initialize(name)
// @name = name
// end
//
// <span class="hilite">def speak()
// return "#{@name} sez MEOW!"
// end</span>
//end</code></pre>

//<pre><code>class Cat < Animal
// <span class="hilite">def initialize(name)
// @name = name
// end</span>
//
// def speak()
// return "#{@name} sez MEOW!"
// end
//end</code></pre>

//<pre><code>kitty = Cat.new('meow')</code></pre>

//<pre><code>puts kitty.speak()</code></pre>

//<code><pre>moreKitten = kitty.reproduce()</code></pre>

//1986

//Xerox PARC

//David Ungar<br/>
//Randall Smith

//Self

//JIT(Just in Time)

//Prototype Inheritance

//No Classes

//<img src="self.png"/><br/>
//Inheritance == a parent link

//__proto__

var john = {firstName: 'John', lastName: 'Doe'}

var jane = {firstName: 'Jane'}

jane.__proto__ = john

//john is a prototype of jane

jane.lastName

jane.firstName

john.hair = "brown"

jane.hair

john.speak = function(){
    console.log('Hi, I am', this.firstName,
        this.lastName, ',', 'and my hair is', this.hair, '.')
}

jane.speak()

john.speak()

jane.lastName = 'Smith'

jane.speak()

delete jane.lastName

jane.lastName

//&lt;/__proto__&gt;

//but, some bad News

//__proto__ doesn't work in IE

//We don't actually use it

//It's there, we just can't see it

//Constructors

function Animal(){}

var cow = new Animal

cow.__proto__ === Animal.prototype

//Constructor.prototype

//Inheritance w<br/>
//Constructors

function Cat(){}

Cat.prototype = new Animal

Cat.prototype.constructor = Cat

var kitty = new Cat()

var protoAnimal = Animal.prototype

var protoCat = Cat.prototype

kitty.__proto__ === protoCat

kitty instanceof Cat

kitty.__proto__.__proto__ === protoAnimal

kitty instanceof Animal

protoCat.speak = function(){
    console.log('Meow')
}

kitty.speak()

protoAnimal.reproduce = function(){
    return new this.constructor()
}

var kitten = kitty.reproduce()

//<pre class="diagram">
//-------- -----
//|Animal| |Cat|
//-------- -----
// \ \
// ------------- ---------- -------
// |protoAnimal|<-----|protoCat|<------|kitty|
// ------------- ---------- -------
//
//</pre>

//Object

kitty instanceof Object

//<pre class="diagram">
//-------- -------- -----
//|Object| |Animal| |Cat|
//-------- -------- -----
// \ \ \
//------------------ ------------- ---------- -------
//|Object.prototype|<---|protoAnimal|<---|protoCat|<---|kitty|
//------------------ ------------- ---------- -------
//
//</pre>

//Extending Core Types

//Extending Arrays

Array.prototype.max = function(){
    var max = null
    for (var i = 0; i < this.length; i++)
        if (max === null || this[i] > max)
            max = this[i]
    return max
}

[1, 2, 3].max()

//Extending Strings

String.prototype.trim = function(){
    return this.replace(/^[ \t\n]*/,'').replace(/[ \t\n]*$/, '')
}

' abc '.trim()

//Extending Numbers

Number.prototype.round = function(){
    return Math.round(this)
}

3.7.round()

//Extending Objects

Object.prototype.copy = function(){
    var copy = {}
    for (var key in this)
        copy[key] = this[key]
    return copy
}

//Proceed with Caution

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

var bob = new Person('Bob')

var protoPerson = Person.prototype

Person.prototype.foo = 'bar'

for (var key in bob)
    console.log(key + ': ' + bob[key])
    
for (var key in bob)
    if (bob.hasOwnProperty(key))
        console.log(key + ': ' + bob[key])
        
//&lt;/PrototypeInheritance&gt;
        
//Javascript in the Browser

//Tags/Elements

var p = document.createElement('p')

p

var a = document.createElement('a')

a.setAttribute('href', 'http://www.google.com')

a.getAttribute('href')

a.href

a.style.float = 'left' // CSS

var text = document.createTextNode('Google')

text

text.data

a.appendChild(text)

p.appendChild(a)

p.innerHTML

p.innerHTML = '<a href="http://www.bing.com">Bing</a>'

p.innerHTML

p.childNodes

p.childNodes.length

a = p.childNodes[0]

a.tagName

p.tagName

document.body.appendChild(p)

function printTree(elm, indent){
    var ret
    if (elm.nodeType == Node.TEXT_NODE)
        ret = indent + elm.data + '\n'
    else if(elm.nodeType == Node.ELEMENT_NODE)
        ret = indent + elm.tagName + '\n'
    for (var i = 0; i < elm.childNodes.length; i++){
        ret += printTree(elm.childNodes[i], indent + ' ')
    }
    return ret
}

printTree(p, '')

a.id = 'bingLink'

document.getElementById('bingLink')

var links = document.getElementsByTagName('a')

links

links.length

links[0]

a.className = 'link'

a.getAttribute('class')

links = document.getElementsByClassName('link')

links.length

links[0]

a.style.position = 'absolute'

a.style['background-color'] = 'white'

a.style.top = '1px'

a.style.right = '20px'

a.style['font-size'] = '40px'

//Event Handlers

a.addEventListener('mouseover', function(){
    console.log('Wanna bing?')
})

a.addEventListener('click', function(){
    console.log('You bang!')
})

//More bad news

//Browser Differences

open('http://tutti.tobyho.com')

</script>
<script src="setup.js"></script>
</body>
</html>
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