Ruby for PHP developers
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Ruby for PHP developers Ruby for PHP developers Presentation Transcript

  • Ruby for PHPDevelopers By Max Titov maxtitov.me Ninja Software Operations
  • Objective: learn and compare▶ What is Ruby and where it is come from?▶ Why Ruby?▶ Ruby basics▶ Ruby ecosystem▶ Ruby specialties▶ How to get started?
  • Facts▶ First “Hello World” in 1995 (PHP 1995 too)▶ Opensource (PHP too)▶ Inspired by: Perl, Smalltalk, Lisp, Python …▶ Philosophy: Designed for programmer productivity and fun.
  • Creator"I wanted a scripting language that wasmore powerful than Perl, and more object-oriented than Python. Thats why I decidedto design my own language.” Yukihiro (Matz) Matsumoto
  • Why Ruby?▶ It’s fun!▶ It’s going to make your better.▶ And definitely it will sabotage what you believe in.
  • Similarities▶ Ruby has exception handling▶ Garbage collector▶ The is fairly large standard library▶ The are classes and access modifiers
  • Ruby is Dynamic▶ No need to declare variablesvar = “World in hell”var.class #Stringvar = 1var.class #Fixnum
  • Ruby is Strong Typed▶ Like in Java or C# there is no type juggling. You need to convert between types.a = “1”b=2a + b #TypeError: cant convert Fixnum into Stringa.to_i + b # 3
  • Everything is an Object▶ Inspired by SmallTalk▶ Unlike other programming languages that states the same, Ruby really is.
  • Everything is an Object▶ Primitive Types are an objects10.times {puts “I am sexy and I know it!”}#Output “I am sexy and I know it!”#Output “I am sexy and I know it!”#Output “I am sexy and I know it!”#Output “I am sexy and I know it!”#Output “I am sexy and I know it!”#....(10 times)…
  • Everything is an Object▶ Control structures are object methods class Fixnum < Integer def – numeric # subtracting code end end
  • Ruby is Flexible▶ Existing ruby code could be easily altered. class Numeric def toSquare self * self end end 2.toSquare# 4
  • Duck typing▶ Definition: When I see a bird that walks like a duck and swims like a duck and quacks like a duck, I call that bird a duck. (Wikipedia)
  • Duck typingWhat makes object an object? Answer is a: Behavior
  • So, is it a duck?Swim? YesCan Quack? YesIs it a duck?Definitely!
  • And this?Swim? YesCan Quack? Yes. Kind ofstrange, but still itmake quack like soundIs it a duck?Looks like!
  • How, about this?Swim? Badly, but yes.Can Quack? Yeah, makePlenty of sounds but, canquack also.Is it a duck?Sort of weird duck, but yes!
  • Or, probably this?Swim? YepCan quack? Canmake weird quacksounds.Is it duck?Trying very hard, soyes 
  • Duck Typing▶ So, everything that could respond to several criterias that makes us believe that it’s a duck, is a duck.
  • Duck Typing in context of Ruby▶ There is no abstract classes and interfaces.▶ There is Modules and Mixins.
  • Modules and Mixins▶ Modules define reusable pieces of code that couldn’t be instantiated.▶ Modules provides a namespace and prevent name clashes▶ Modules could be “mixin” to any class that satisfy conventions described in documentation (Should quack and swim like a duck).▶ In PHP 5.4 Traits is an equivalent to Mixins
  • How we usually do this in PHPInterface ILog{ function write($message)}EventLog implements ILog{ function write($message) { //useful code }}
  • How we do this in Rubymodule Log def write #code endEndclass EventLog include Log def Prepare endend
  • Implementing Enumerable▶ From Enumerable module documentation: The Enumerable mixin provides collection classes with several traversal and searching methods, and with the ability to sort. The class must provide a method “each”, which yields successive members of the collection.
  • Implementing Enumerableclass MyCollection include Enumerable def each #yields result endend
  • About coding guide lines▶ Remember the times of Hungarian notation? $f_amount = 100.00; $s_string = “I am definitely a string”;▶ How many coding guide lines there? ▶ PEAR, ▶ Zend, ▶ Wordpress ▶ Your company standard
  • You. When you get someones code with different coding guide lines.
  • Ruby Coding guide linesRuby syntaxes mostly dictates codingguidelines: ▶ localVariable ▶ @instanceVariable ▶ @@classVariable ▶ $globalVariable ▶ Constant ▶ ClassName ▶ method_name
  • Ruby metaprogramming▶ DRY – Don’t repeat yourself.▶ But that’s another story 
  • FrameworksRuby PHP▶ Ruby on ▶ Symfony, Yii, Zend Rails, Merb …▶ Sinatra ▶ Sylex▶ Radiant, Mephisto ▶ WordPress, Drupal , Joomla
  • ToolsRuby PHP▶ Ruby Gems ▶ PEAR, Composer▶ Bundler ▶ Bash, Composer▶ TestUnit, minitest ▶ PHPUnit▶ Cucumber, Rspec, ▶ Behat Shoulda
  • Testing Rocks!
  • Feel like a Rubier now?
  • Ruby tutorial 101Interactive ruby tutorial:▶ http://tryruby.org/Online course:▶ http://www.coursera.org/course/saas/▶
  • Books▶ Programming Ruby (Pick Axe book)By Thomas D., Fowler C., Hunt A.▶ Design Patterns In RubyBy Russ Olsen▶ Search Google for: Learn Ruby
  • Follow the ruby side we have cookies 
  • Questions? Ruby for PHP developers By Max TitovGet examples: www.maxtitov.meGet in touch: eolexe@gmail.com Twitter: eolexe