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Rubyでクラスメソッドの定義方法色々

Last updated at Posted at 2012-03-16

今まではdef self.hogeって書いてたけど,class << self ...の方がまとまって見通しが良さそう.

class A
  def A.class_method_one; end

  def self.class_method_two; end

  class << A
    def class_method_three; end
  end

  class << self
    def class_method_four; end
  end
end

def A.class_method_five; end

class << A
  def class_method_six; end
end
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