Tuesday, April 6, 2021

April 2021 1HaskellADay 1Liners Problems and Solutions

  • 2021-04-07, Wednesday:
    you have (Maybe a, Maybe b)
    you want Maybe (a, b)

    If either (Maybe a) or (Maybe b) is Nothing
    then the answer is Nothing.

    If both (Maybe a) and (Maybe b) are (Just ...)
    then the answer is Just (a, b)

    WHAT SAY YOU?

    • Jérôme Avoustin @JeromeAvoustin: bisequence
    • p h z @phaazon_ with base: uncurry $ liftA2 (,)
    • greg nwosu @buddhistfist: (,) <$> ma <*> mb

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