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RubyでF#のパイプライン演算子みたいなことがしたい

Last updated at Posted at 2014-03-25

F#のパイプライン演算子が好きなので、Rubyでも似たことができたら良いなぁと思いやってみた。

pipeline.rb
module Pipeline
  def pipe
    if block_given?
      yield self
    else
      self
  end

  Object.send(:include, Pipeline)
end

なんか同じメソッドが既にどこかにありそうだけど気にしない。

ブログで書いたのと同じやつ

test.rb
#1234を二乗して、文字列にして、順番逆にして、数字に戻す
1234.pipe {|i| i ** 2}.pipe(&:to_s).pipe(&:reverse).pipe(&:to_i)
#=> 6572251

こういう使い方はあんまり嬉しくない。

糊付けするとか?

hoge.rb
hoge.pipe {|i| f(hoge) }.pipe {|i| g(i) }
hoge.rb
"hoge".pipe(&["a", "b", "c"].method(:join))
#=> "ahogebhogec"

使いどころが分からない。

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