10 Things you should know about Ruby
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10 Things you should know about Ruby
- 1. 10 Things You Should Know About Ruby
- 2. 1. Ruby != Rails
- 3. • Programming Language • 1995 – First public release • Many Implementations • MRI 1.8 – Matz’s Ruby Intepreter • YARV 1.9 • JRuby • IronRuby • Rubinius • MacRuby • MagLev
- 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”
- 6. • Web application framework written in Ruby • “Ruby” on “Rails” • David Heinemeier Hansson (DHH) • Extracted from 37Signal’s Basecamp in 2004
- 7. • Open Source • Currently maintained by Rails Core Team • git://github.com/rails/rails • Latest version: 3.0.1
- 8. No more confusion! http://www.flickr.com/photos/ecstaticist/2589723846/
- 19. Everything in Ruby is Object
- 20. No Primitive
- 22. Even nil ...
- 24. ... and class!
- 27. 4. No method call
- 32. 5. Mixin
- 33. Module
- 34. Module • Collection of methods and constants • Not-instanciatable • But callable • Append features upon included
- 35. Multiple inheritance is very bad
- 36. Mixin • Include methods you want from another module • No limit of how many modules you include
- 38. { 6. } (block)
- 39. “Closure”
- 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
- 42. 7. We love duck http://www.flickr.com/photos/ymorimo/3975152607/
- 43. Duck typing • If it quacks like a duck, it’s a duck! • Check for object’s property, not interface
- 46. Duck Punching!
- 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
- 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
- 52. Testing tools • RSpec • Cucumber • Test::Unit • Rack::Test
- 54. 9. RubyGems
- 57. Gem • Library written under Ruby or C • Packaged by owner and upload to RubyGems.org • Easy to install, just gem install gem_name
- 58. 10. IT’S FUN!
- 59. Question? Thank you! Prem Sichanugrist @sikachu http://sikachu.com 3.9454 in Beautiful Software