[Haskell-beginners] pattern matching on a common element
Rahul Muttineni
rahulmutt at gmail.com
Fri Nov 25 06:36:06 UTC 2016
data X =
A1 { name :: String, d :: Double}
| A2 { name :: String, i :: Int}
| A3 { name :: String, d1 :: Double, i1 :: Int}
Now you can use `name` directly to get the string component of the
different variants.
Hope that helps!
Rahul
On Fri, Nov 25, 2016 at 11:16 AM, <briand at aracnet.com> wrote:
> Here's what I'm doing:
>
> data X = A1 String Double | A2 String Int | A3 String Double Int
>
> name c =
> case c of
> A1 name _ -> name
> A2 name _ -> name
> A3 name _ _ -> name
>
> I'm sure there's a better way...
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--
Rahul Muttineni
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