Simon Willison’s Weblog

Unicode Regular Expressions. [a \U00010450] Match “a” or U+10450 SHAVIAN LETTER PEEP

Posted 3rd March 2004 at 3:06 am

Recent articles

First impressions of Claude Cowork, Anthropic's general agent - 12th January 2026
My answers to the questions I posed about porting open source code with LLMs - 11th January 2026
Fly's new Sprites.dev addresses both developer sandboxes and API sandboxes at the same time - 9th January 2026

Monthly briefing

Sponsor me for $10/month and get a curated email digest of the month's most important LLM developments.

Pay me to send you less!

Sponsor & subscribe