Regular Expressions 101

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Community Patterns

84

Distinguish torrent files (series vs movies)

Python
A neat regex for finding out whether a given torrent name is a series or a movie. Returns the full name of the series with the separator needed to make it pretty (ie, replace it with space or what you want). Also returns the season number or the year for the movie/series, depending on what was prev...
Submitted by Firas Dib - 10 years ago (Last modified a year ago)
87

Password Validation

ECMAScript (JavaScript)
Checks that a password has a minimum of 6 characters, at least 1 uppercase letter, 1 lowercase letter, and 1 number with no spaces.
Submitted by Christian Klemp - 9 years ago
107

ECMAScript/JavaScript trim

ECMAScript (JavaScript)
Trim leading and trailing whitespace from a string.
Submitted by fp - 11 years ago (Last modified 3 months ago)
238

Matching email addresses per RFC5322

PCRE (PHP <7.3)
The BNF rules from RFC 5322 transformed to PCRE by Nikita Popov and described in the post http://nikic.github.io/2012/06/15/The-true-power-of-regular-expressions.html.
Submitted by Michael Musson - 11 years ago
483

regex101.com permalink id grabber

PCRE (PHP <7.3)
Grabs the ID for the regex101.com permalink code. If a revision number is provided, grab that as well.
Submitted by chris mccoy - 11 years ago (Last modified 8 months ago)
1...900901902

Community Library Entry

0

Regular Expression
ECMAScript (JavaScript)

/
(^([0-9a-fA-F]{1,4}:){7,7}[0-9a-fA-F]{1,4}$|^([0-9a-fA-F]{1,4}:){6}:(?:[0-9a-fA-F]{1,4}){0,1}$|^([0-9a-fA-F]{1,4}:){5}(?:(:[0-9a-fA-F]{1,4}){1,2}|:)$|^([0-9a-fA-F]{1,4}:){4}(?:(:[0-9a-fA-F]{1,4}){1,3}|:)$|^([0-9a-fA-F]{1,4}:){3}(?:(:[0-9a-fA-F]{1,4}){1,4}|:)$|^([0-9a-fA-F]{1,4}:){2}(?:(:[0-9a-fA-F]{1,4}){1,5}|:)$|^[0-9a-fA-F]{1,4}:(?:(:[0-9a-fA-F]{1,4}){1,6}|:)$|^:((:[0-9a-fA-F]{1,4}){1,7}|:)$)|(^(?:(?:25[0-5]|(?:2[0-4]|1{0,1}[0-9]){0,1}[0-9])\.){3,3}(?:25[0-5]|(?:2[0-4]|1{0,1}[0-9]){0,1}[0-9])$)
/
ig
Open regex in editor

Description

This regexp match an ip address in v6 or v4 form. Included V6 compact form (:: in place of :0000:). Doesn't matches addresses range or mixed format (like y:y:y:y:y:y:x.x.x.x)

Submitted by Emanuele Benedetti - 2 years ago (Last modified 2 years ago)