elephant

赫本之后 再无女神

Ruby元编程1

ruby元编程之eigenclass

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class BasicObject
  def self.eigenclass
    class << self
      self
    end
  end
  def eigenclass
    class << self
      self
    end
  end
end

class A
  def self.haha
    "ah"
  end
end

class B < A
end

#对象eigenclass的superclass就是对象的类
b=B.new
p b.eigenclass.superclass == B
#类的eigenclass的superclass是类超类的eigenclass
p B.eigenclass.superclass == B.superclass.eigenclass