[Haskell-cafe] Re: Lists and monads

On Jul 26, 3:26 pm, Bill Atkins wrote:

Can you post an example of your code?

Without getting into the complexities, one simple example is a fold where the step function returns results in a monad. I have taken to replacing the fold in that case with a recursive function, which surely is the wrong approach. I think foldM might do the job but am unsure. But as I said, that is just an example. I keep wanting to apply the usual list tools but find that they do not work inside a monad. I find myself wishing that f (m [a]) just automatically returned m f([a]) without me needing to do anything but I expect that there are reasons why that is not a good idea. Kevin