Diagonalization/ dupe for monads and tuples?

Oliver Charles ollie at ocharles.org.uk
Thu Sep 17 07:44:45 UTC 2020

Regardless of having a more abstract version, I'm +1 on Jon's suggestion, and those names. fromEither is something I have reached for many many times and been surprised it's not within arms reach.

On Thu, 17 Sep 2020, at 7:16 AM, Jon Purdy wrote:
> Iā€™m strongly for these:
> Data.Tuple.dup :: a ā†’ (a, a)
> Data.Either.fromEither :: Either a a ā†’ a
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