Re: [Haskell-cafe] lens and Maybe value

----- Le 20 Déc 22, à 17:18, David Feuer david.feuer@gmail.com a écrit :

Please clarify your question. Your code doesn't compile, and I can't tell what it's supposed to do.

replace a (Maybe a) value in a data using lens only if the new (Maybe a) is a Just Is it clearer ?