Proposal: add fromRight and fromLeft to Data.Either

Michael Burge michaelburge at pobox.com
Mon May 30 01:00:30 UTC 2016


+1 on the total versions.

On Sat, May 28, 2016 at 5:48 PM, wren romano <wren at community.haskell.org>
wrote:

> On Sat, May 21, 2016 at 2:06 PM, Andreas Abel <abela at chalmers.se> wrote:
> > Ah, yes, we want fromLeft and fromRight, but with types
> >
> >   fromLeft  :: a -> Either a b -> a
> >   fromRight :: b -> Either a b -> b
> >
> > where the first argument is the "default", like
>
> If anything is added, then +1 for these versions.
>
> Very strong -1 for adding partial functions.
>
> --
> Live well,
> ~wren
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