I see code like this in our codebase: `}.mapLeft {...

# arrow

[Marius Kotsbak]

I see code like this in our codebase: }.mapLeft { throw it } (on Either<Throwable, A>). Is this or should be part of the lib? I can't find out what rethrow() does, if it it is the same. Or something like getOrThrow.

[stojan]

from what I remember the idea is not to expose unsafe (not RT) APIs in arrow itself.

You can always add that yourself as an extension function

[Marius Kotsbak]

Oki

[simon.vergauwen]

Yes, since we want to keep the Arrow libraries pure we're not exposing unsafe APIs.

If there is enough demand maybe someone is interested in making and maintaining an Arrow-Unsafe or something similar in line with Scala's alley-cats which exposes unlawful code.

[Marius Kotsbak]

It's mostly to operate with Java APIs that require exception throwing.