NSPasteboard crashes due to unsafe, internal concurrent memory mutation when handling file promises

This is a public reposting of FB14885505, in case it’s helpful to anyone else or especially in case someone else has seen this too and knows how to work around it. NSPasteboard mutates itself simultaneously from the main thread and the global concurrent Dispatch pool, w.r.t. to its internal type cache. This is surprisingly trivial… Read more

Calling Swift Concurrency async code synchronously in Swift

Sometimes you just need to shove a round peg into a square hole. Sometimes that genuinely is the best option (or perhaps more accurately: the least bad option). I find my hand is often forced by APIs I don’t control (most often Apple’s APIs). e.g. data source or delegate callbacks that are synchronous and require… Read more

When all you have is a Core Data, everything looks like…

Still from the scene in Orgazmo with the Mormon Missionaries greeting a homeowner at their door and asking "Have you heard the good news about Core Data?".

Reading SwiftData vs Realm: Performance Comparison reminded me of an anecdote from my days working on Shark, at Apple. I don’t really remember the timing – sometime between 2006 and 2010 – but presumably around 2006 as I recall it was when Core Data was still relatively new. For whatever reason, there was a huge… Read more

Swift on a Raspberry Pi (in 2024)

Five years ago installing Swift on a Raspberry Pi – or really any non-Apple platform – was fairly involved. Compared to getting a Raspberry Pi working to begin with it was easy, but still a far cry from apt install swift. Sadly it’s still not quite that easy (and some Python package is squatting on… Read more

The only usable ByteCountFormatStyle is decimal

Swift makes it relatively easy to format numbers as byte counts, with appropriate suffixes to indicate units and generally sensible auto-selection of scale factors. e.g.: 1 kB (in English – results may vary depending on locale) This is just a small subset of Swift’s FormatStyle-based formatting capabilities, with which I have a bit of a… Read more

Fucking FormatStyle

I have a bit of a love-hate relationship with Swift’s FormatStyle-based formatting capabilities. 42% (in English – results may vary depending on locale) On the pro side: But the cons are rough: All in all, there’s a reason fuckingformatstyle.com exists (and don’t forget to tip!).