
Hey Alexander, |dict| has type |String|. Therefore, |x| is of type |Char|, but |elem '-'| is of type |[Char] -> Bool| (simplified). Hence, you get a type mismatch. If you just want to count every character except |'-'|, then you could just you |'-' /= x|. Cheers Tobias On 8/13/20 1:02 PM, Alexander Chen wrote:
Hi,
module Main where allwords :: IO Int allwords = do dict <- readFile "data/dict.txt" return $ length [x | x <- dict , not $ '-' `elem` x] main :: IO Int main = do allwords
error
* Couldn't match expected type `t0 Char' with actual type `Char' * In the second argument of `elem', namely `x' In the second argument of `($)', namely '-' `elem` x In the expression: not $ '-' `elem` x
could someone tell me what I am doing wrong?
thanks!
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