From: Satsou Sa <moshimoshi.here@...>
Date: 2010-12-31T01:41:35+09:00
Subject: Re: How to hook a callback through inheritance

Thanks to **Mon_Ouie**, the solution is:

    class Lmao
      def initialize
        @str = "HAHAHAHAHAHHAHAHAH"
      end

      def self.inherited(base)
        base.extend(Callbacks)
      end

      def laughing
        self.class.callbacks_before_laughing.each {|method| send(method) 
}
        @str
      end
    end

    module Callbacks
      def before_laughing(*methods)
        @before_laughing = methods
      end

      def callbacks_before_laughing
        @before_laughing
      end
    end

    class Lol < Lmao
      before_laughing :downcase_please

      def downcase_please
        @str.downcase!
      end
    end

Pretty awesome.

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