anyway found a nasty little crash caused by sparse arrays a… — samuel.fm

Samuel 4 Nov 2025

live footage of me and @esb.lol learning about javascript’s sparse array behaviour

The Garden of Earthly Delights by Hieronymous Bosch

Samuel 4 Nov 2025

JS: oh? you think arr.every(x => !!x).map(…) is safe? think again fucko

Samuel

@samuel.fm

anyway found a nasty little crash caused by sparse arrays and implicit reliance on the order of things rendering

Prevent sparse arrays in snapToOffsets by mozzius · Pull Request #9329 · bluesky-social/social-app

I accidentally introduced something quite stupid in #7128 - it would lay out all the interest tabs, and then when all the tabs had been all laid out, it would set the offsets to snapToOffsets. Howe...