Ruby 2.0

A brief introduction to Ruby 2.0.

Transcript

1. Ruby 2.0
2. Agenda • What's new in Ruby 2.0? – Intro – Installation – What's new? • Hicks and tricks (not Ruby only)
3. What's new in Ruby 2.0? • Ruby 2.0 was released in Feb 24th, 2013. 2 months back • 100% Ruby 2.0 is backward comaptible ~ Matz • Awesome new features (coming on)
4. Installation • RVM – rvm get stable • Mine is rvm 1.19.1 – rvm install ruby-2.0.0 • Today ruby 2.1.0dev (with rvm install ruby-head)
5. So what's new? • Refinements • Module#prepend • Enumerable#lazy • Keyword arguments • %i or %I • Garbage collector (maybe discussed later)
6. Refinments
7. Refinments (1) • Monkey patching (open classes) affects all instances
8. Refinments (2)
9. Refinments (3) • How to solve the monkey patching problem? – Module#refine – Kernel#using
10. Module#refine (1)
11. Module#refine (2)
12. Kernel#using (1)
13. Kernel#using (2)
14. Kernel#using (3)
15. Kernel#using (4)
16. Kernel#using (5)
17. Refinment Example (1) Rspec pollution
18. Refinment Example (2)
19. Refinment Example (3) • https://github.com/amatsuda/rspec- refinements • https://github.com/amatsuda/activerecord- refinements
20. WARNING (irb):3: warning: Refinements are experimental, and the behavior may change in future versions of Ruby!
21. Module#prepend
22. Module#prepend (1)
23. Module#prepend (2) • "alias_method_chain" was replaced with Modules in Rails 3
24. Module#prepend (3)
25. Module#prepend (4)
26. Module#prepend (5) • What if I want to extend the "foo" method without "alias_method_chain"?
27. Module#prepend (6)
28. Enumerable#lazy
29. Enumerable#lazy
30. Keyword Arguments
31. Keyword Arguments (1)
32. Keyword Arguments (2)
33. %i or %I
34. %i or %I • Defines an array of symboles
35. Hicks and tricks (not Ruby only)
36. Hicks and tricks (not Ruby only) • define_method • Observers in Rails
37. define_method
38. Rails Observer • rails g observer feature
39. Credits • Most of the contents (almost all) are cited from Akira Matsuda – http://www.youtube.com/watch?v=RHcXC9R Ojlw – https://speakerdeck.com/a_matsuda/ruby-2- dot-0-on-rails
40. Thanks