Ruby 2.0

A glance of Ruby 2.0

Transcript

1. Ruby 2.0
2. February 24th 2013
3. Ruby’s 20th birthday.
4. Faster
5. Reliable
6. More fun to use
7. REFINEMENTS
8. • A mechanism to extend Classes and Modules locally • Lexically scoped • Safer and cleaner than open-class monkey patching
9. • Module#refine • Kernel#using
10. module Foo refine String do def say "Yoho, #{self}!" end end end class Bar using Foo def aloha 'Bar'.say end end
11. Bar.new.aloha => “Yoho, Bar!”
12. PREPEND
13. Module#prepend
14. class A def foo 'foo' end end module B def foo super + 'bar' end end class C < A prepend B def foo super + 'COOL' end end
15. C.new.foo => “fooCOOLbar”
16. LAZY
17. Enumerator#lazy
18. (1..Float::INFINITY).lazy.select(&:even?).take(20).force
19. [2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40]
20. KEYWORD ARGUMENT
21. class Bar def foo(a: "foo", b: 424242) [a, b] end end
22. Bar.new.foo => ['foo', 424242]
23. 2.0.0-preview1
24. END