Thanks for all the help. The simplified example indeed threw away too
much. There were no side effects.
Brent, of course I couldn't create your function; though I gained
through trying. I then found it useful to consider the type of:
fmap (\x - putStrLn x) getLine
which is IO (IO ()) and hence
On Sat, May 2, 2009 at 11:31 AM, Paul Keir pk...@dcs.gla.ac.uk wrote:
On the wiki page for Applicative Functors
(http://www.haskell.org/haskellwiki/Applicative_functor) a familiar
characteristic of monads is quoted; that they allow you to run actions
depending on the outcomes of earlier
On Sat, May 02, 2009 at 05:31:03PM +0100, Paul Keir wrote:
On the wiki page for Applicative Functors
(http://www.haskell.org/haskellwiki/Applicative_functor) a familiar
characteristic of monads is quoted; that they allow you to run actions
depending on the outcomes of earlier actions. I
On Sat, May 02, 2009 at 05:31:03PM +0100, Paul Keir wrote:
An example immediately follows that quotation on the wiki:
do text - getLine
if null text
then putStrLn You refuse to enter something?
else putStrLn (You entered ++ text)
Then, how about
getMyLine = getLine =
