Keeps track of the longest key and value in a hash, letting you retrieve them later. Avoids having to scan the entire hash when at all possible.

I wrote this in response to a discussion on perlmonks, which you can find here:

http://www.perlmonks.com/index.pl?node_id=285305

To install, do the usual dance:

less Makefile.PL
less lib/Tie/Hash/Longest.pm
less test.pl
those being to ensure that I'm not being evil, then:

perl Makefile.PL
make
make test
make install