On Thu, Jan 13, 2011 at 3:18 AM, Saul Hazledine <shaz...@gmail.com> wrote: > Hello, > I've never used monads but I have a problem that feels like it could > be solved elegantly with them. > > I have a sequence of functions of arbitary size and an input sequence > s. Each function is given a sequence and returns a sequence that can > be bigger than the input sequence. I want the output of one function > to be operated on using a mapcat of the next function: > > (let [seq-of-fns [f1 f2 f3 ... fm]] > (mapcat fm ... (mapcat f2 (mapcat f1 s))) > > If any of the functions return nil, I'd like the computation to stop.
I don't see any real reason not to use (reduce #(if %1 (mapcat %2 %1)) s seq-of-fns) unless you have another requirement you haven't told us. -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
