From: ts <decoux@...>
Date: 2004-02-27T02:38:53+09:00
Subject: Re: Callback

>>>>> "H" == Han Holl <han.holl@pobox.com> writes:

H> The following code works, but I was wondering if the creation of the @obj
H> instance variable is really necessary?

 The problem is not with the instance variable, but with the evil eval :-)

 You don't prefer this ?

svg% cat b.rb
#!/usr/bin/ruby
class A
end

class B
   def initialize(k, cb)
      class << cb; self end.instance_eval do
         define_method('cassette') { k }
      end
   end
end
a = A.new
g = B.new([1,2,3], a)
puts a.cassette
svg% 

svg% b.rb
1
2
3
svg% 



Guy Decoux