[Haskell-beginners] Questions on type declarations

[thorsopia at lavabit.com]

Hi,

Could you comment on the following type declarations?

 - getArgs :: IO [String]

   It can get several params, but its type declaration looks like it gets
   none.

 - dispatch :: [(String, [String] -> IO ())] [1]

   I don't know how to read this one. It looks bizarre.

[1] http://learnyouahaskell.com/input-and-output#files-and-streams