I don't know if anybody has mentioned it yet, but check out weak references on CPAN:
http://search.cpan.org/~lukka/WeakRef-0.01/WeakRef.pm -Dan -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] <http://learn.perl.org/> <http://learn.perl.org/first-response>
