A solution for capture query params.

Python

A more thorough UK postcode validator tested against all UK postcodes on a regular basis, but excluding the special GIRO postcode case out of personal preference. Additionally has capture groups for the In-code and Out-code sections. Requires case insensitive matching.

Validates subdomain, root domain, and wild card domains

Extract URL parts only named capturing groups

Match any layer bracket pair

Checks validity of an EA number first two digits 01-12 followed by hyphen then a number from 0-4 and then 4 numbers or uppercase letters and ending in a 1 or 4 for example "05-1J7601". Adding a capital C to the beginning is also accepted "C05-1J7601", along with the entry of 2 X's hyphen and 6 X's ...

.Net regular expression for resolving placeholders in the format of ${rewriter(multilevel:key)?fallback} (+ variations)

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.

use this to get value of any side of an equation. You can combine this with https://regex101.com/r/fH5kJ1/1

import url image

With this C# regex, you can easily match/Parse Nested HTML tags. Example input: ...

Form Tag

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

For scraping http://skepticsannotatedbible.com/

IOS3166 Country Code Identification REGEX