Simon Willison’s Weblog

How To Subclass The JavaScript Array Object. Utterly brilliant—create a fresh copy of Array in an iframe and customise that.

Posted 19th November 2006 at 7:11 pm

Recent articles

My Lethal Trifecta talk at the Bay Area AI Security Meetup - 9th August 2025
The surprise deprecation of GPT-4o for ChatGPT consumers - 8th August 2025
GPT-5: Key characteristics, pricing and model card - 7th August 2025

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