There is something similar in GitHub.com/ba-st/Buoy called Optional. It's not a full fledged Monad implementation but for most cases it would do.

On Jan 26, 2018 21:34, "horrido" <horrido.hobbies@gmail.com> wrote:
Is there a Pharo equivalent to Ruby's Maybe monad? See
https://github.com/rap1ds/ruby-possibly




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