Re: [Haskell-beginners] IO operations

Hello Alexander Il 13 agosto 2020 alle 13:02 Alexander Chen ha scritto:

allwords :: IO Int allwords  = do     dict <- readFile "data/dict.txt"     return  $ length [x | x <- dict , not $ '-' `elem` x]

`elem` has type: λ> :t elem elem :: Eq a => a -> [a] -> Bool -- almost You are comparing '-' (a `Char`) with `x` (another `Char`), hence you only need `==`. Does this make sense? —F