From: mutahhir hayat <mutahhir.ali@...>
Date: 2008-03-22T02:27:40+09:00
Subject: Re: dynamically defining a method on an instance that references vars in enclosing scope?

>  I know that the problem is scope. That's why I suggested a way to
>  manipulate the scope :-)
>
>  I definitely would not (and deliberately did not) throw a global
>  variable at it. Also, defining x inside MyClass doesn't help, because
>  that's also a different local scope.

I wasn't sure, but running an intermix of your code with the original
still would give the same error in irb. I wasn't advocating the use of
globals, ( though, come to think about it, i do feel bad now even
mentioning it :P) but I didn't consider that x wouldn't be usable.

:) I'm still getting used to this metaprogramming thing, but how did
you change scope? In my view, the scope remains exactly same, you just
allowed the method to be inserted into the object instance
dynamically.

Anyways, simplest i found was: (swearing never to mention global again... :P)

class MyClass
   attr_accessor :x
   #... or if you want you could do
   # def initialize(x); @x = x; end
end

instance = MyClass.new

def instance.foo
 puts x
end

instance.x = 1
instance.foo


would work.

MT.

>
>
>  David