add something to a list

[Adrian Hey]

On Sunday 17 February 2002 17:04, Cagdas Ozgenc wrote:
> > getPath :: Path -> IO Path
> > getPath currentPath = do
> > piece <- getLine
> > if piece == "" then return currentPath
> > else getPath (piece:currentPath)
> >
> > initialCurrentPath::Path
> > initialCurrentPath = []
> >
> > main :: IO ()
> > main = do
> > path <- getPath initialCurrentPath
> > putStrLn (show path)

> Hi Adrian,
>
> How can I add a function that sorts this list that I read from the user and
> accumulate using the function that you described? I am not asking for a
> sort algorithm of course, I am just wondering how to feed the IO Path as an
> input to a sort function? Is it suppose to look like this:
>
> sort :: IO Path -> IO Path
>
> or
>
> sort :: IO Path -> Path
>
> How do you iterate over IO Path?
>
> Thanks for taking time.

I don't know what iterating over something means
(the opposite of iterating under something I suppose)

I think you want something like this..

import List (sort)

sortGet :: IO Path -> IO Path
sortGet get = do
	got <- get
	return (sort got)

or maybe even..

import Monad (liftM)

sortGet :: IO Path -> IO Path
sortGet = liftM sort

Regards
--
Adrian Hey