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

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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