Hi Lawrence, it seems that you are trying to print your defined function. Most likely you just forgot to apply an argument to fswp. So 'fswp (1,2)' should just work fine. Cheers, Tobias On 9/9/21 11:25 PM, Galaxy Being wrote:
I've got this
import Data.Tuple fswp :: (a, b) -> (b, a) fswp = Data.Tuple.swap
and get this
• No instance for (Show ((a0, b0) -> (b0, a0))) arising from a use of ‘print’ (maybe you haven't applied a function to enough arguments?) • In a stmt of an interactive GHCi command: print it
Not sure why or what to do to correct it.
⨽ Lawrence Bottorff Grand Marais, MN, USA borgauf@gmail.com mailto:borgauf@gmail.com
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