El jue, 05-08-2010 a las 17:08 -0700, prad escribió:
i was wanting to do something like keep pulling characters and make a new string until the delimiter was found
"keep pulling ... until the delimiter was found" sounds suspiciously like takeWhile and friends (like break, see below).
fn cs = [x | x <- cs, x /= '%'] : []
This doesn't split, it just filters. In particular, you have no way of knowing where in the string elements where discarded.
but can't figure out how to use this idea to actually cause splitting into [String]
Neither do I :)
i also explored break and splitAt, but haven't quite worked out a mechanism to use those, yet.
break is exactly what I would use. The only problem is that break will only look for the first delimiter match. To get all the matches, you will have to get the recursion right... For practice purposes, in particular for getting used to recursion, it might also be useful to write the function without any help of library functions, traversing the string using direct recursion only. For every character you encounter, what do you have to do in each case? Jürgen