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Today's Topics:
1. Maybe a -> Maybe b (PICCA Frederic-Emmanuel)
----------------------------------------------------------------------
Message: 1
Date: Fri, 25 Aug 2017 08:05:34 +0000
From: PICCA Frederic-Emmanuel
<frederic-emmanuel.pi...@synchrotron-soleil.fr>
To: "beginners@haskell.org" <beginners@haskell.org>
Subject: [Haskell-beginners] Maybe a -> Maybe b
Message-ID:
<a2a20ec3b8560d408356cac2fc148e53bb41b...@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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