Credit: https://gist.github.com/FinalAngel/1876898

A simple RegEx rule which should validate redirect_uri for oAuth2

Select a character (or string) ingnoring if that element is inside the HTML tags. Useful to apply html tags using replace.

IOS3166 Country Code Identification REGEX

a mac address separated by dashes or colons.

Regular expression for password validation Rules: 8-120 chars no spaces must contain at least one a-z char must contain at least one A-Z char...

Matches all valid IP addresses from 0.0.0.0 to 255.255.255.255

fjk@1Qaa$

Form Tag

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

supports all major protocols

This regex grabs all kinds of imgur links and groups them in meaningful names aswell. This way you have full flow-control in your python-scripts.

If you want to understand an SQL statement for Hibernate: this replaces the selected fields in an SQL statement generated by Hibernate by a shorthand, since you usually just care about the logic. E.g. it changes select foo0_.bla as bla1_3, foo0_.bar as bar1_3, foo0_.baz1_3 as baz1_3 from ... to sele...