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
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”
5. Smalltalk Perl Lisp Scheme Python CLU Eiffel Ada Dylan {
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/
9. 2. Simple syntax
17. Too Easy! http://www.flickr.com/photos/clairity/143368932/
18. 3. Pure Object-Oriented
19. Everything in Ruby is Object
20. No Primitive
22. Even nil ...
24. ... and class!
26. http://www.flickr.com/photos/gastev/2630867950/ Related to duck!
27. 4. No method call
28. “Message sending”
31. http://www.flickr.com/photos/headlouse/1484615917/
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
49. 8. Testing is FFFF**... (FFFFUUNNN)
50. Encourage testing
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
55. Libraries in Ruby
56. http://rubygems.org
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