Regex Wars
A practice and challenge platform for regular expressions, in the shape of Codewars.
Regex Wars is meant to be a testing platform and a community around regular expressions — closer to Codewars than to a puzzle game. You take on challenges against a set of test strings, some your pattern has to match and some it must not, your expression is graded against all of them, and the interesting part is comparing your solution to everyone else's afterwards. Regex has an unusually wide gap between "works" and "good", which is exactly the kind of gap a community forms around.
I wanted it because regex turns up in most technical interviews and in nearly every job that involves reading logs, and there is nowhere obvious to practise it. You either read the syntax reference or you fumble at it in production until something works.
The honest position is that none of that exists yet. What is at regexwars.com today is a placeholder: a landing page, a sign-up, and a form asking people which kinds of challenges they would want. There is no platform behind it, and it has sat untouched since early 2025. If I pick it back up, the first thing to go is the sign-in wall — asking someone to create an account before showing them a single challenge is plainly the wrong order.