Ruby for PHP developers

Introduction to Ruby for PHP developers

Transcript

1. By Max Titov maxtitov.me
 Ninja Software Operations Ruby for PHP
 Developers
2. 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?
4. Facts ▶  First  “Hello  World”  in  1995  (PHP  1995  too)   ▶  Opensource  (PHP  too)   ▶  Inspired  by:  Perl,  Smalltalk,  Lisp,  Python  …   ▶  Philosophy:  Designed  for  programmer     producIvity  and  fun.  
5. Creator "I wanted a scripting language that was more powerful than Perl, and more object- oriented than Python. That's why I decided to design my own language.”      Yukihiro  (Matz)  Matsumoto
6. Why Ruby? ▶  It’s fun! ▶  It’s going to make your better. ▶  And definitely it will sabotage what you believe in.
7. Similarities ▶  Ruby has exception handling ▶  Garbage collector ▶  The is fairly large standard library ▶  The are classes and access modifiers
8. Ruby is Dynamic ▶  No need to declare variables var = “World in hell” var.class #String var = 1 var.class #Fixnum
9. Ruby is Strong Typed ▶  Like in Java or C# there is no type juggling.
 You need to convert between types. a = “1” b = 2 a + b #TypeError: can't convert Fixnum into String a.to_i + b # 3
10. Everything is an Object ▶  Inspired by SmallTalk ▶  Unlike other programming languages that states the same, Ruby really is.
11. Everything is an Object ▶  Primitive Types are an objects 
 10.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)…
12. Everything is an Object ▶  Control structures are object methods class Fixnum < Integer def – numeric # subtracting code end end
13. Ruby is Flexible ▶  Existing ruby code could be easily altered. class Numeric def toSquare self * self end end 2.toSquare# 4
14. 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)
15. Duck typing What makes object an object? Answer is a: Behavior
16. So, is it a duck? Swim?  Yes   Can  Quack?  Yes     Is  it  a  duck?   Definitely!  
17. And this? Swim?  Yes   Can  Quack?  Yes.  Kind  of   strange,  but  sIll  it     make  quack  like  sound     Is  it  a  duck?   Looks  like!  
18. How, about this? Swim?  Badly,  but  yes.     Can  Quack?  Yeah,  make     Plenty  of  sounds  but,  can     quack  also.     Is  it  a  duck?   Sort  of  weird  duck,  but  yes!  
19. Or, probably this? Swim?  Yep   Can  quack?  Can     make  weird  quack   sounds.     Is  it  duck?   Trying  very  hard,  so   yes  J  
20. Duck Typing ▶  So, everything that could respond to several criteria's that makes us believe
 that it’s a duck, is a duck.
21. Duck Typing in context of Ruby ▶  There is no abstract classes and interfaces. ▶  There is Modules and Mixins.
22. 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
23. How we usually do this in PHP Interface ILog { function write($message) } EventLog implements ILog { function write($message) { //useful code } }
24. How we do this in Ruby module Log def write #code end End class EventLog include Log def Prepare end end
25. 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.
26. Implementing Enumerable class MyCollection include Enumerable def each #yields result end end
27. 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
28. You. When you get someone's code with different coding guide lines.
29. Ruby Coding guide lines Ruby syntaxes mostly dictates coding guidelines: ▶  localVariable ▶  @instanceVariable ▶  @@classVariable ▶  $globalVariable ▶  Constant ▶  ClassName ▶  method_name
30. Ruby metaprogramming ▶  DRY – Don’t repeat yourself. ▶  But that’s another story J
31. Frameworks Ruby ▶  Ruby on Rails, Merb ▶  Sinatra ▶  Radiant, Mephisto PHP ▶  Symfony, Yii, Zend … ▶  Sylex ▶  WordPress, Drupal, Joomla
32. Tools Ruby ▶  Ruby Gems ▶  Bundler ▶  TestUnit, minitest ▶  Cucumber, Rspec, Shoulda PHP ▶  PEAR, Composer ▶  Bash, Composer ▶  PHPUnit ▶  Behat
33. Testing Rocks!
34. Feel like a Rubier now?
35. Ruby tutorial 101 Interactive ruby tutorial: ▶  http://tryruby.org/ Online course: ▶  http://www.coursera.org/course/saas/ ▶  

36. Books ▶  Programming Ruby (Pick Axe book)
 By Thomas D., Fowler C., Hunt A. ▶  Design Patterns In Ruby
 By Russ Olsen ▶  Search Google for: Learn Ruby
37. Follow the ruby side we have cookies J
38. Questions? Ruby for PHP developers By Max Titov Get examples: www.maxtitov.me Get in touch: eolexe@gmail.com Twitter: eolexe