gistfile1.txt

>> class Lmao
>>   def initialize
>>     @str = "HAHAHAHAHAHHAHAHAH"
>>     @before_laughing = []
>>   end
>> 
?>   def self.inherited(base)
>>     base.extend(Callbacks)
>>   end
>> 
?>   def laughing
>>     self.class.before_laughing_callbacks.each {|method| send(method) }
>>     @str
>>   end
>> end
=> nil
>> 
?> module Callbacks
>>   def before_laughing_callbacks(*methods)
>>     @before_laughing = methods
>>   end
>> end
=> nil
>> 
?> class Lol < Lmao
>>   before_laughing_callbacks :downcase_please
>> 
?>   def downcase_please
>>     @str.downcase!
>>   end
>> end
=> nil
>> 
?> a = Lol.new
=> #<Lol:0x101f1ee18 @before_laughing=[], @str="HAHAHAHAHAHHAHAHAH">
>> puts a.laughing
HAHAHAHAHAHHAHAHAH
=> nil