Simon Willison’s Weblog

25th November 2003 - Link Blog

How Regexes Work (via) They’re just simplified syntax for constructing a state machine

Posted 25th November 2003 at 12:27 am

Recent articles

Now we have a timeline of the OpenAI accidental attack against Hugging Face - 7th August 2026
One-shotting a Raccoon Heist game using Claude Fable 5 - 5th August 2026
New release of LLM adds support for reasoning traces, OpenAI Responses, server-side tools, and smarter logging - 4th August 2026

This is a link post by Simon Willison, posted on 25th November 2003.

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