== Closure ==
 * This is a notion out of the Lisp world that says if you define an anonymous function in a particular lexical context, it pretends to run in that context even when it's called outside of the context.
 * they're one of those aspects of Perl -- like object-oriented programming -- that everyone raves about and you can't really see the big deal until you play around with them and then they just click.

== References ==
 * [http://www.perl.com/doc/FAQs/FAQ/oldfaq-html/Q3.14.html Perl FAQ 3.14 - What's a "closure"? ]
 * [http://www.unix.org.ua/orelly/perl/advprog/ch04_03.htm Advanced Perl Programming 4.3 Closures]
 * [http://www.perl.com/pub/a/2002/05/29/closure.html Achieving Closure]