Rails for the PHP Dev
(You know youʼre curious...)
November 7, 2009

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My Pet Peeves

My Pet Peeves
People that drive slow (in general)

My Pet Peeves
People that drive slow (in general)
People that donʼt use their turn signal

My Pet Peeves
People that drive slow (in general)
People that donʼt use their turn signal
People that read books while they drive

My Pet Peeves
People that drive slow (in general)
People that donʼt use their turn signal
People that read books while they drive
People that canʼt make up their mind

My Pet Peeves
People that drive slow (in general)
People that donʼt use their turn signal
People that read books while they drive
People that canʼt make up their mind
People that post anonymous comments (weak)

My Pet Peeves
People that drive slow (in general)
People that donʼt use their turn signal
People that read books while they drive
People that canʼt make up their mind
People that post anonymous comments (weak)
Trolls, Internet or otherwise

My Pet Peeves
People that drive slow (in general)
People that donʼt use their turn signal
People that read books while they drive
People that canʼt make up their mind
People that post anonymous comments (weak)
Trolls, Internet or otherwise
People that fuck with my sprint

My Pet Peeves
People that drive slow (in general)
People that donʼt use their turn signal
People that read books while they drive
People that canʼt make up their mind
People that post anonymous comments (weak)
Trolls, Internet or otherwise
People that fuck with my sprint
Asshole bosses who wonʼt understand their people

Ruby - History

Ruby - History
Released in 1995 by Yukihiro “Matz” Matsumoto

Ruby - History
Released in 1995 by Yukihiro “Matz” Matsumoto
Blends Perl, Smalltalk, Eiffel, Ada, and Lisp

Ruby - History
Released in 1995 by Yukihiro “Matz” Matsumoto
Blends Perl, Smalltalk, Eiffel, Ada, and Lisp
Natural language syntax

Ruby - History
Released in 1995 by Yukihiro “Matz” Matsumoto
Blends Perl, Smalltalk, Eiffel, Ada, and Lisp
Natural language syntax
Mass acceptance in 2006

Ruby - Objects

Ruby - Objects
Everything is an object

Ruby - Objects
Everything is an object
Everything can be given its own properties (instance
variables) and actions (methods)

Ruby - Objects
Everything is an object
Everything can be given its own properties (instance
variables) and actions (methods)
All types have methods and instance variables

Ruby - Objects
Everything is an object
Everything can be given its own properties (instance
variables) and actions (methods)
All types have methods and instance variables
The same rules apply everywhere

Ruby - Objects
Everything is an object
Everything can be given its own properties (instance
variables) and actions (methods)
All types have methods and instance variables
The same rules apply everywhere
Remove, redefine, and extend at will

Ruby on Rails - History

Ruby on Rails - History
Released in 2005 by David Heinemeier Hansson

Ruby on Rails - History
Released in 2005 by David Heinemeier Hansson
Full-stack framework for developing database-backed web
apps

Ruby on Rails - History
Released in 2005 by David Heinemeier Hansson
Full-stack framework for developing database-backed web
apps
MVC

Ruby on Rails - History
Released in 2005 by David Heinemeier Hansson
Full-stack framework for developing database-backed web
apps
MVC
Builds on the power of Ruby

Ruby on Rails - History
Released in 2005 by David Heinemeier Hansson
Full-stack framework for developing database-backed web
apps
MVC
Builds on the power of Ruby
Convention over configuration

Ruby on Rails - Common Uses
Dynamic web sites
Data warehousing and data mining
Statistics reporting
Management applications
Collaborative apps
Community sites
E-commerce
...

PHP MVC Frameworks
Cake PHP
SolarPHP
Symfony
(others)

Arrays - PHP

Arrays - PHP
in_array($needle, $haystack);

Arrays - PHP
in_array($needle, $haystack);
array_push($haystack, $needle);

Arrays - Ruby
1
2
3
4

Variable Assignment - PHP

Variable Assignment - PHP
$a = array();

Variable Assignment - PHP
$a = array();
$b = $a;

Variable Assignment - PHP
$a = array();
$b = $a;
$a[ʻfooʼ] = ʻbarʼ;

Variable Assignment - PHP
$a = array();
$b = $a;
$a[ʻfooʼ] = ʻbarʼ;
var_export($a); => array(ʻfooʼ => ʻbarʼ)

Variable Assignment - PHP
$a = array();
$b = $a;
$a[ʻfooʼ] = ʻbarʼ;
var_export($a); => array(ʻfooʼ => ʻbarʼ)
var_export($b); => array()

Variable Assignment - Ruby

Variable Assignment - Ruby
a = {} => {}

Variable Assignment - Ruby
a = {} => {}
b=a => {}

Variable Assignment - Ruby
a = {} => {}
b=a => {}
a[ʻfooʼ] = ʻbarʻ => “bar”

Variable Assignment - Ruby
a = {} => {}
b=a => {}
a[ʻfooʼ] = ʻbarʻ => “bar”
a => {“foo” => “bar”}

Variable Assignment - Ruby
a = {} => {}
b=a => {}
a[ʻfooʼ] = ʻbarʻ => “bar”
a => {“foo” => “bar”}
b => {“foo” => “bar”}

Variable Assignment (2) - Ruby

Variable Assignment (2) - Ruby
a = ʻfooʻ => “foo”

Variable Assignment (2) - Ruby
a = ʻfooʻ => “foo”
b=a => “foo”

Variable Assignment (2) - Ruby
a = ʻfooʻ => “foo”
b=a => “foo”
a.reverse! => “oof”

Variable Assignment (2) - Ruby
a = ʻfooʻ => “foo”
b=a => “foo”
a.reverse! => “oof”
b.reverse! => “foo”

Variable Assignment (2) - Ruby
a = ʻfooʻ => “foo”
b=a => “foo”
a.reverse! => “oof”
b.reverse! => “foo”
a.equal? b => true

http://www.flickr.com/photos/floridapfe/

Methods - PHP
class Monkey
public function toss($fruit) {
// toss a piece of fruit at someone
}
}

Methods - Ruby
class Monkey
def toss(fruit)
# toss some fruit at someone
end
end

Methods (2) - PHP
class Monkey
public function toss($fruit, $feces = true) {
// toss a piece of fruit at someone
}
}

Methods (2) - Ruby
class Monkey
def toss(fruit, feces = true)
# toss some fruit at someone
end
end

Passing Named Params - PHP
class Building {
public function __construct($height = 10, $width = 10,
$depth = 10)
{
// check and store params
}
}

Passing Named Params (2) - PHP
$b = new Building(10,20,30);

Passing Named Params (3) - PHP
$b = new Building(array(ʻheightʼ => 10,
ʻwidthʼ => 20,
ʻdepthʼ => 50));

Passing Named Params - Ruby
$b = Building.new(:height => 10,
:width => 20,
:depth => 50)

Example PHP Function
for ($bananas = 50, $bananas > 0; $bananas --) {
echo “The monkey has thrown $bananas bananasn”;
}

Example Ruby Block
50.downto(1) { | num | puts “#{num} bananas thrown” }

Example Ruby Block - Hidden Goodies
int.downto(limit) { |i| block } => int
Iterates block, passing decreasing values from int down to
and including limit.

Example Ruby Block
50.downto(1) { |num| puts “#{num} bananas thrown” }

Example Ruby Block - Result
50 bananas thrown
49 bananas thrown
48 bananas thrown
47 bananas thrown
46 bananas thrown
...
1 bananas thrown

Attributes - PHP
class Monkey {
protected $species;
public $name;
public function __construct($species, $name) {
$this -> species = $species;
$this -> name = $name;
}
}

Attributes - Ruby
class Monkey
def initialize(species, name)
@species = species
@name = name
end
def species
@species
end
...
end

Attributes - Ruby
class Monkey
attr_reader :species
attr_accessor :name
attr_writer :bananas_eaten
def initialize(species, name)
...
end

Method Visibility - PHP
public function ...
protected function ...
protected function ...
private function ...
public function ...

Method Visibility - Ruby
class SomeClass
def my_public_method
end
protected
# Everything down here is protected

Method Visibility - Ruby
class Monkey
private
def format(value)
value.capitalize
end

Typing- Ruby

Typing- Ruby
foo = ʻbarʻ => “bar”

Typing- Ruby
foo = ʻbarʻ => “bar”
foo = 42 => 42

Typing- Ruby
foo = ʻbarʻ => “bar”
foo = 42 => 42
foo + 2 => 44

Typing- Ruby
foo = ʻbarʻ => “bar”
foo = 42 => 42
foo + 2 => 44
foo + “2”.to_i => 44

Rails Application Structure
README
Rakefile
app
config
db
doc
lib
log
public
script
test
tmp
vendor

Rails Application Structure - app
app
- controllers
- helpers
- models
- views

Rails Application Structure - config
config
- boot.rb
- database.yml
- environment.rb
- environments
- initializers
- locales
- routes.rb

Rails Application Structure - db
db
- migrations
- schema.rb

Rails Application Structure - The Rest
doc
lib
log
public
script
test
tmp
vendor

Start a Rails App
rails -d mysql railsforphpdevs

Start a Rails App
rails -d postgres railsforphpdevs

Start a Rails App
rails -d sqlite railsforphpdevs

Thanks!
Questions?