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![> %q[hello world]
=> "hello world"
> %i[hello world]
=> [:hello, :world]](https://image.slidesharecdn.com/dontpanic-ruby2-130408080036-phpapp01/85/O-que-tem-de-novo-no-Ruby-2-0-11-320.jpg)
![def foo(options = {})
param1 = options[:param1]
param2 = options[:param2]
return [param1, param2]
end
> foo param1: "Hello", param2: "World"
=> ["Hello", "World"]](https://image.slidesharecdn.com/dontpanic-ruby2-130408080036-phpapp01/85/O-que-tem-de-novo-no-Ruby-2-0-13-320.jpg)
![def foo(param1: nil, param2: nil)
return [param1, param2]
end
> foo param1: "Hello", param2: "World"
=> ["Hello", "World"]](https://image.slidesharecdn.com/dontpanic-ruby2-130408080036-phpapp01/85/O-que-tem-de-novo-no-Ruby-2-0-14-320.jpg)
![> [1,2,3].to_s
=> "[1, 2, 3]"](https://image.slidesharecdn.com/dontpanic-ruby2-130408080036-phpapp01/85/O-que-tem-de-novo-no-Ruby-2-0-16-320.jpg)
![> [1,2,3].to_s
=> "[1, 2, 3], Foo"
> Array.ancestors
=> [Array, Foo, Enumerable, Object, Kernel,
BasicObject]](https://image.slidesharecdn.com/dontpanic-ruby2-130408080036-phpapp01/85/O-que-tem-de-novo-no-Ruby-2-0-18-320.jpg)
![> [1,2,3].to_s
=> "[1, 2, 3], Foo"
> Array.ancestors
=> [Foo, Array, Enumerable, Object, Kernel,
BasicObject]](https://image.slidesharecdn.com/dontpanic-ruby2-130408080036-phpapp01/85/O-que-tem-de-novo-no-Ruby-2-0-20-320.jpg)
![> a = (0..3).map { |i| i }
=> [0, 1, 2, 3]](https://image.slidesharecdn.com/dontpanic-ruby2-130408080036-phpapp01/85/O-que-tem-de-novo-no-Ruby-2-0-22-320.jpg)
![module Foo
def hello
"Hello, #{to_s}"
end
end
class Array
include Foo
end
> [1,2,3].hello
=> "Hello, [1, 2, 3]"](https://image.slidesharecdn.com/dontpanic-ruby2-130408080036-phpapp01/85/O-que-tem-de-novo-no-Ruby-2-0-26-320.jpg)
![module Foo
refine Array do
def hello
"Hello, #{to_s}"
end
end
end
using Foo
> [1,2,3].hello
=> "Hello, [1, 2, 3]"](https://image.slidesharecdn.com/dontpanic-ruby2-130408080036-phpapp01/85/O-que-tem-de-novo-no-Ruby-2-0-27-320.jpg)
![module Foo def bah
refine Array do [1,2,3].hello
def hello end
"Hello, #{to_s}"
end > bah.hello
end NoMethodError: undefined
end method `hello' for
"Hello, [1, 2,
using Foo 3]":String
> [1,2,3].hello
=> "Hello, [1, 2, 3]"](https://image.slidesharecdn.com/dontpanic-ruby2-130408080036-phpapp01/85/O-que-tem-de-novo-no-Ruby-2-0-28-320.jpg)
Uploaded byFabio Akita
O que tem de novo no Ruby 2.0?
The document discusses the key new features in Ruby 2.0, including improved compatibility with Ruby 1.9, new literal symbol lists, keyword arguments, module prepend, lazy enumerators, refinements, and an improved garbage collection system using bitmap marking. It also provides an overview of installing Ruby and Rails using RVM.
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- 1. O que temde novo no Ruby 2? Fabio Akita @akitaonrails codeminer42.com
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- 8. Ruby 2.0 24 de Fevereiro de 2013
- 9.
- 10.
- 11. > %q[hello world] =>"hello world" > %i[hello world] => [:hello, :world]
- 12.
- 13. def foo(options ={}) param1 = options[:param1] param2 = options[:param2] return [param1, param2] end > foo param1: "Hello", param2: "World" => ["Hello", "World"]
- 14. def foo(param1: nil,param2: nil) return [param1, param2] end > foo param1: "Hello", param2: "World" => ["Hello", "World"]
- 15.
- 16. > [1,2,3].to_s => "[1,2, 3]"
- 17. module Foo def self.included(base) base.class_eval do alias_method :original_to_s, :to_s def to_s original_to_s + ", Foo" end end end end class Array include Foo end
- 18. > [1,2,3].to_s => "[1,2, 3], Foo" > Array.ancestors => [Array, Foo, Enumerable, Object, Kernel, BasicObject]
- 19. module Foo def to_s super + ", Foo" end end class Array prepend Foo end
- 20. > [1,2,3].to_s => "[1,2, 3], Foo" > Array.ancestors => [Foo, Array, Enumerable, Object, Kernel, BasicObject]
- 21.
- 22. > a =(0..3).map { |i| i } => [0, 1, 2, 3]
- 23. > a =(0..3).lazy.map { |i| i } => #<Enumerator::Lazy: #<Enumerator::Lazy: 0..3>:map> > a.next => 0 > a.next => 1 > a.next => 2 > a.next => 3
- 24. > a =(0..Float::INFINITY).lazy.map { |i| i } => #<Enumerator::Lazy: #<Enumerator::Lazy: 0..Infinity>:map> > a.next => 0 > a.next => 1 > a.next => 2 > a.next => 3
- 25.
- 26. module Foo def hello "Hello, #{to_s}" end end class Array include Foo end > [1,2,3].hello => "Hello, [1, 2, 3]"
- 27. module Foo refine Array do def hello "Hello, #{to_s}" end end end using Foo > [1,2,3].hello => "Hello, [1, 2, 3]"
- 28. module Foo def bah refine Array do [1,2,3].hello def hello end "Hello, #{to_s}" end > bah.hello end NoMethodError: undefined end method `hello' for "Hello, [1, 2, using Foo 3]":String > [1,2,3].hello => "Hello, [1, 2, 3]"
- 29.
- 30. curl -L https://get.rvm.io| bash -s stable --rails --autolibs=enabled
- 35.
- 40.
- 41.
- 42.
- 43.
- 44.
- 45. Browser Browser Browser Browser NGINX Worker Worker Worker Worker Rails Rails Rails Rails Ruby Ruby Ruby Ruby Linux
- 46. Browser Browser Browser Browser NGINX Worker Worker Worker Worker Rails Rails Rails Rails Ruby Ruby Ruby Ruby Linux
- 47.
- 48. struct RBasic { VALUE flags; RString flags VALUE klass; klass };
- 49. RString RString RString flags flags flags klass klass klass
- 50. RString RString RString flags flags flags klass klass klass fork()
- 51. RString RString RString flags flags flags klass klass klass fork()
- 52. RString RString RString flags flags flags klass klass klass GC.start() RString RString RString flags flags flags klass klass klass
- 53. OOBW Out ofBand Work
- 56. Lazy Lazy Sweep GC- Ruby 1.9.3
- 57. “CoW” Copy onWrite
- 58. RString RString RString flags flags flags klass klass klass
- 59. RString RString RString flags flags flags klass klass klass
- 60. RString RString RString flags flags flags klass klass klass
- 61. RString RString RString flags flags flags klass klass klass
- 63.
- 68.
- 73. Bitmap Bitmap Marking GC- Ruby 2.0
- 76. 9 00001001 8 00001000 7 00000111
- 77. 9 00001001 8 00001000 7 00000111
- 78. 9 00001001 8 00001000 7 00000111
- 80. 00000001 2^0 1 User 00000010 2^1 2 Moderator 00000100 2^2 4 Administrator
- 81. 00000001 2^0 1 User 00000010 2^1 2 Moderator 00000100 2^2 4 Administrator
- 82. 00000001 2^0 1 User 00000010 2^1 2 Moderator 00000100 2^2 4 Administrator
- 83. 1 1 1 0 0 0 0 0 0 0 0
- 84. 1 1 1 0 0 0 0 0 0 0 0 fork()
- 85.
- 86.
- 87. Browser Browser Browser Browser NGINX Worker Worker Worker Worker Rails Rails Rails Rails Ruby Ruby Ruby Ruby Linux
- 88. Browser Browser Browser Browser Browser Browser Browser Browser Browser Browser NGINX Worker Worker Worker Worker Worker Worker Worker Worker Worker Worker Rails Rails Rails Rails Rails Rails Rails Rails Rails Rails RubyRuby Ruby Ruby Ruby Ruby Ruby Ruby Ruby Ruby Linux
- 89. Browser Browser Browser Browser Browser Browser Browser Browser Browser Browser NGINX Worker Worker Worker Worker Worker Worker Worker Worker Worker Worker Rails Rails Rails Rails Rails Rails Rails Rails Rails Rails RubyRuby Ruby Ruby Ruby Ruby Ruby Ruby Ruby Ruby Linux
- 90. Rails 3.2.12+ Rails 4.0
- 91.