Re: [Haskell] Help-me read file

I have a file with 100 lists, with 100 ints.

I have to read the file and apply the map and sort functions on lists.

II did it to read file:

learquivo :: FilePath -> IO ([[Int]]) learquivo s = do            conteudo <- readFile s            return (read conteudo)

But now applying the sort, the error appears:

<interactive>:1:5:    Couldn't match expected type `[a]'           against inferred type `IO [[Int]]'

how can I fix?

You did not even say how you produced that error. Assuming you are in GHCi, you want to do: m <- learquivo "miarquivo" :t m (Think of the interactive GHCi prompt as inside a big ``do''.) Hope this helps! Wolfram