Regex used in Splunk to extract fields from Mikrotik FW. NOTES: Mikrotik must be configured to use "BSD Syslog" format FW rules must add, as log prefix, the action: drop accep...

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.

Grabs the ID for the regex101.com permalink code. If a revision number is provided, grab that as well.

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...

Matches all valid IP addresses from 0.0.0.0 to 255.255.255.255

http://stackoverflow.com/questions/2362985/verifying-a-cron-expression-is-valid-in-java

Find and extract email domain. Ex: test@example.pt -> extract 'example.pt'

RegEx email /^((?!\.)[\w-_.]*)(@\w+)(\.\w+(\.\w+)?)$/gim; Just playing with Reg Ex. This to validate emails in following ways ...

Simply searches for the thread-id in any kind of valid reddit-URL.

This regex should extract the subdomain, if any, or the domain, if no subdomain is used, from an arbitrary URL

extract video id, index, play list id from youtube url