qq, i noticed that Nullables have `Nullable.zip` but it doesn’t have the extension function `public...

# arrow

[mitch]

qq, i noticed that Nullables have Nullable.zip but it doesn’t have the extension function public inline fun <A, B, Z> A?.zip(b: B?, fn: (A, B) -> Z): Z? i’m quite sure arrow devs have a good reason behind this..?

[simon.vergauwen]

The problem here is that any extension on A? is available everywhere.

So it conflicts with all other zip methods.

That’s the reason why “nullable” is the exception. Any extension on it conflicts with all other extension functions with the same name in the same package.

[simon.vergauwen]

Originally we had A?.zip, but that conflicted with Either#zip, Option#zip etc

[mitch]

right that totally makes sense! thanks @simon.vergauwen 🙌