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Today's Topics:

   1.  Maybe a -> Maybe b (PICCA Frederic-Emmanuel)


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Message: 1
Date: Fri, 25 Aug 2017 08:05:34 +0000
From: PICCA Frederic-Emmanuel
        <frederic-emmanuel.picca@synchrotron-soleil.fr>
To: "beginners@haskell.org" <beginners@haskell.org>
Subject: [Haskell-beginners] Maybe a -> Maybe b
Message-ID:
        <A2A20EC3B8560D408356CAC2FC148E53BB41B8D4@SUN-DAG3.synchrotron-soleil.fr>

Content-Type: text/plain; charset="us-ascii"

Hello, I have this

data Proxy = Proxy String

And I want to write a function

f :: Maybe Proxy -> Maybe String
f ma = case ma of
           (Just (Proxy a)) -> Just a
           Nothing -> Nothing

I was wondering if there is no simpler way to do this ?

thanks

Frederic

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