[sjrd]

I am one of the maintainers is the Scala compiler, and this is one of the things that immediately jump to me when I review code that contains any casing operation. Always explicitly specify the locale. However, unlike TFA and other comments, I don't suggest `Locale.US`. That's a little too US-centric. The canonical locale is in fact `Locale.ROOT`. Granted, in practice it's equivalent, but I find it a little bit more sensible.

Also, this is the last remaining major system-dependent default in Java. They made strict floating point the default in 17; UTF-8 the default encoding some versions later (21?); only the locale remains. I hope they make ROOT the default in an upcoming version.

FWIW, in the Scala.js implementation, we've been using UTF-8 and ROOT as the defaults forever.

[mormegil]

I agree that Locale.ROOT is the canonical choice. But in this case, Locale.US also makes sense: it isn't some abstract "US is some kind of the global default", it is saying "we know are upcasing an English word".

[fukka42]

Wouldn't the British locale make more sense then?

[JuniperMesos]

> However, unlike TFA and other comments, I don't suggest `Locale.US`. That's a little too US-centric. The canonical locale is in fact `Locale.ROOT`. Granted, in practice it's equivalent, but I find it a little bit more sensible.

I have no idea what `Locale.ROOT` refers to, and I'd be worried that it's accidentally the same as the system locale or something, exactly the sort of thing that will unexpectedly change when a Turkish-speaker uses a computer or what have you.

[layer8]

> I'd be worried that it's accidentally the same as the system locale or something

The API docs clearly specify that Locale.ROOT “is regarded as the base locale of all locales, and is used as the language/country neutral locale for the locale sensitive operations.”

[troad]

> However, unlike TFA and other comments, I don't suggest `Locale.US`. That's a little too US-centric. The canonical locale is in fact `Locale.ROOT`. Granted, in practice it's equivalent, but I find it a little bit more sensible.

Isn't it kind of strange to say that Locale.US is too US centric, and therefore we'll invent a new, fictitious locale, the contents of which is all the US defaults, but which we'll call "the base locale of all locales"? That somehow seems even more US centric to me than just saying Locale.US.

Setting the locale as Locale.US is at least comprehensible at a glance.

[kevin_thibedeau]

It is a programming language agnostic equivalent of POSIX C locale with Unicode enhancement.