[Haskell-beginners] pattern matching on a common element

[briand at aracnet.com]

On Fri, 25 Nov 2016 12:06:06 +0530
Rahul Muttineni <rahulmutt at gmail.com> wrote:

> 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!

oops, i forgot to mention.

i'd like to be able to write my code;

x =  [ A1 "a1" 2.0, A2 "a2" 3 ]

etc... to save myself a lot of typing.