ChrisK <[EMAIL PROTECTED]> wrote:
> zeroNothing Nothing = Nothing
> zeroNothing (Just n) =
> if n == 0 then Nothing else (Just n)
>
> versus
>
> zeroNothing Nothing = Nothing
> zeroNothing x@(Just n) =
> if n == 0 then Nothing else x
>
versus
zeroNothing Nothing = Nothing
zeroNothing x =
let (Just n) = x
in if n == 0 then Nothing else x
so, @ is kind of like a let, just with its arguments flipped.
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