Accept List.Nonempty inputs so you don't have to return Maybes everywhere

Question

Accept List.Nonempty inputs so you don't have to return Maybes everywhere

Erudition opened this issue 3 years ago · comments

Martin Sigloch · Answer 1 · Fri Oct 08 2021 17:57:32 GMT+0800 (China Standard Time)

Thank you for the suggestion 🙏.

I like the idea, but have to think a bit how to implement this because List.Nonempty is not in Core.
In about a month I will continue working with this, and will likely make some updates then.

Erudition · Answer 2 · Tue Nov 02 2021 08:59:18 GMT+0800 (China Standard Time)

That's true! The dependency-free way to do nonempty lists is:
(Type, List Type) where the first item is in the tuple and the list can be empty as usual.

Lots of us prefer the syntax sugar in the Nonempty package though (look at the code and you'll see it's just a wrapper over exactly that - not much to the "library"), and with Elm 0.19's forced semantic versioning, tree shaking and inlining, there's not much point in "avoiding dependencies". (None of the wrappers make it into the compiled production code)

Martin Sigloch · Answer 3 · Sat Jun 25 2022 21:18:42 GMT+0800 (China Standard Time)

I finally got around to this one.
In tag 3.0.0 there is a separate module for nonempty lists: List.Nonempty.Statistics.
Functions for normal lists are now in List.Statistics.