> From: Kevin Jardine <kevinjard...@gmail.com> > > As a Haskell neophyte, one of the things I find confusing is the way > that the usual list functions (map, fold, ++, etc.) often cannot be > used directly with monadic lists (m [a] or [m a]) but seem to require > special purpose functions like ap, mapM etc. > > I suspect that things are not quite as difficult as they appear, > however, but cannot find any tutorials on monadic list manipulation. >
It's not really a tutorial, but have you read the Typeclassopedia, http://haskell.org/sitewiki/images/8/85/TMR-Issue13.pdf ? I found it very helpful to get a good understanding of functors, applicatives, and monads, after which it became much simpler to get good usage from Control.Monad and Control.Applicative. John _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
