Slides from a talk the author presented at TPC and YAPC. Covers the /o flag and re 'eval'.

An article about how to use regular expressions in Perl by M-J Dominus.

The Perl-module by Hakan Kjellerstrand composes a regex-expression from a list of words.

Pattern matching and regular expressions.

An introduction covering basic concepts.

Notes and slides from a two part talk that, in its first part, details the algorithm that perl uses internally to do regex matching and, in its second part, discusses practical parsing applications and RegEx optimization

A discussion of the complexity of regular expression matching algorithms in Perl.

One-page document containing tabulated summaries of common codes, modifiers, and special characters.

A quick introduction to Perl regular expressions for those who have some programming experience.

An useful ready reference - with informative tips - for those who use Perl regular expressions regularly.