Reference Resources
Hyperpolyglot for PHP, Perl, Python and Ruby
A “side-by-side reference sheet” (or lingo) for Perl, as well as PHP, Python and Ruby, with many commonly used idioms. Useful for looking up idioms from a language you are better familiar with in Perl. (Creative Commons Attribution-ShareAlike ( CC-by-sa ) 3.0 License).
perlreref - Perl Regular Expressions’ Reference
perlop - Perl Operators
perlopquick - Operators Quick Reference
Proposed POD documents for providing quick references for the Perl operators.