Aha! I was using record syntax but I didn't know I could use it like that. Thanks! Now for that lenses thing.
Hi Adrian,
> data Thing = Thing Int Int Int Int Int
> rewriteFourth :: Int -> Thing -> Thing
> rewriteFourth x (Thing a b c _ e) = Thing a b c x e
>
> Is there a better way?
If you've nested data structures, than lenses are the way to go,
but in your case using record syntax might also help.
data Thing = Thing {
a :: Int,
b :: Int,
c :: Int,
d :: Int,
e :: Int
}
rewriteFourth :: Int -> Thing -> Thing
rewriteFourth x thing = thing {d = x}
Greetings,
Daniel
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