I am using them since my Perl-days … so I found this a great introduction with hidden gems1! Also check out the online-tool from Lea Verou for playing around with regular expressions online: http://leaverou.github.io/regexplained/.
A regular expression, regex or regexp (sometimes called a rational expression) is, in theoretical computer science and formal language theory, a sequence of characters that define a search pattern.
Definition from Wikipedia – Regular expression
Lea Verou (Greek: Λία Βέρου; born June 13, 1986) is a front end web developer, speaker and author, originally from Greece.
Definition from Wikipedia – Lea Verou
- recommendation via Andre Michelle ↩