Ruby 2.0 - Speaker Deck

Ruby 2.0

by Yukihiro Matsumoto

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Powered by Rabbit 1.0.4 Module#prepend class Foo def foo; p :foo; end end module Prepend def foo p :before super p :after end end class Foo prepend Prepend end Foo.new.foo 54/97

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Powered by Rabbit 1.0.4 Refinements module R refine String do def foo ... end end end "".foo # => error! using R "".foo 61/97

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Powered by Rabbit 1.0.4 既存クラス拡張の試み Selector namespace (Smallscript) Classbox (Smalltalk/Java) 拡張メソッド (C#) プロファイル (Classic) 62/97

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Powered by Rabbit 1.0.4 Enumerable#lazy (1..Float::INFINITY).lazy.map {|i| i.to_s }.select{|s| /3/ === s }.first(5) 81/97