Putting on my CLC hat to summarize the talk so far into a concrete plan:
It looks like there is sufficient consensus to add the
fromLeft :: a -> Either a b -> a
fromRight :: b -> Either a b -> b
variants to Data.Either, so let's do that.
This avoids partiality concerns, and seems to have broad support. I'll
modify the `either` package to re-export them once they make it into base
to avoid import conflicts.
Does someone want to bang out a patch?
-Edward
On Sun, Jun 12, 2016 at 2:29 AM, Erik de Castro Lopo
Anton Felix Lorenzen wrote:
When working with Either, I am often missing two simple functions: fromRight :: Either a b -> b fromLeft :: Either a b -> a
It has been implemented a couple of times: http://hayoo.fh-wedel.de/?query=fromRight
But I don't want to depend on yet another library for such a basic function.
Could it be added?
-1 on the addition of yet another partial function.
Erik -- ---------------------------------------------------------------------- Erik de Castro Lopo http://www.mega-nerd.com/ _______________________________________________ Libraries mailing list Libraries@haskell.org http://mail.haskell.org/cgi-bin/mailman/listinfo/libraries