10 Things you should know about Ruby

Interrest in Ruby? I think these are 10 things you should know about it.

This was presented in Barcamp Bangkok 4, Oct 23-24, 2010, at Sripathum University Bangkhen Campus.

Transcript

1. 10 Things
   You Should Know About
   Ruby
   

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2. 1. Ruby != Rails
   

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3. • Programming Language
   • 1995 – First public release
   • Many Implementations
   • MRI 1.8 – Matz’s Ruby
   Intepreter
   • YARV 1.9
   • JRuby
   • IronRuby
   • Rubinius
   • MacRuby
   • MagLev
   

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4. “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”
   

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5. Smalltalk
   Perl
   Lisp
   Scheme
   Python
   CLU
   Eiffel
   Ada
   Dylan
   {
   

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6. • Web application framework
   written in Ruby
   • “Ruby” on “Rails”
   • David Heinemeier Hansson
   (DHH)
   • Extracted from 37Signal’s
   Basecamp in 2004
   

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7. • Open Source
   • Currently maintained by
   Rails Core Team
   • git://github.com/rails/rails
   • Latest version: 3.0.1
   

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8. No more confusion!
   http://www.flickr.com/photos/ecstaticist/2589723846/
   

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9. 2. Simple syntax
   

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17. Too Easy!
    http://www.flickr.com/photos/clairity/143368932/
    

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18. 3. Pure Object-Oriented
    

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19. Everything in Ruby
    is Object
    

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20. No Primitive
    

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22. Even nil ...
    

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24. ... and class!
    

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26. http://www.flickr.com/photos/gastev/2630867950/
    Related to duck!
    

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27. 4. No method call
    

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28. “Message sending”
    

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31. http://www.flickr.com/photos/headlouse/1484615917/
    

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32. 5. Mixin
    

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33. Module
    

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34. Module
    • Collection of methods and constants
    • Not-instanciatable
    • But callable
    • Append features upon included
    

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35. Multiple inheritance
    is very bad
    

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36. Mixin
    • Include methods you want from another
    module
    • No limit of how many modules you include
    

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38. { 6. }
    (block)
    

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39. “Closure”
    

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40. Ruby’s Block
    • Passing a block as argument
    • Method “yield” or “call” the block
    • May passing a object as argument
    • Result from the block goes back to the
    method
    

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42. 7. We love duck
    http://www.flickr.com/photos/ymorimo/3975152607/
    

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43. Duck typing
    • If it quacks like a duck, it’s a duck!
    • Check for object’s property, not interface
    

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46. Duck Punching!
    

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47. Duck Punching
    (Monkey patch)
    • Objects and class are open
    • Add method to object even at Runtime!
    • Not really recommend, less maintainability,
    might break some stuff
    • But it’s awesome
    

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49. 8. Testing is
    FFFF**...
    (FFFFUUNNN)
    

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50. Encourage testing
    

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51. Testing ...
    • Ensure everything still works after you
    make change to something else
    • Save you ass from client’s call at 3AM
    • Test driven development
    • Write test – watch it fails – write just
    enough code to make it pass – refactor
    

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52. Testing tools
    • RSpec
    • Cucumber
    • Test::Unit
    • Rack::Test
    

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54. 9. RubyGems
    

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55. Libraries in Ruby
    

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56. http://rubygems.org
    

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57. Gem
    • Library written under Ruby or C
    • Packaged by owner and upload to
    RubyGems.org
    • Easy to install, just
    gem install gem_name
    

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58. 10. IT’S FUN!
    

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59. Question?
    Thank you!
    Prem Sichanugrist
    @sikachu
    http://sikachu.com
    3.9454 in
    Beautiful Software
    

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