From: John Doe <bl4.929b@...>
Date: 2010-10-25T22:58:57+09:00
Subject: Need help with class variables and inheritance

Hi,

Suppose i wrote something like this:

class TestClass
  @@testmethod = lambda { puts "inside testmethod" }
  def method_missing(name, *args)
    eval("@@#{name}").call(*args)
  end
end

irb(main):002:0> TestClass.new.testmethod
inside testmethod

It works fine but if I have more classes i don't want to duplicate the
same method_missing. I thought i could write this:

class TestSuperClass
  def method_missing(name, *args)
    eval("@@#{name}").call(*args)
  end
end
class TestSubClass < TestSuperClass
  @@testmethod = lambda { puts "inside testmethod" }
end

but then i get this error:

irb(main):003:0> TestSubClass.new.testmethod
NameError: (eval):1:in `method_missing': uninitialized class variable
@@testmethod in TestSuperClass

Is there any way to get it to work?

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