Also, what about this:
(loop [z (zip/seq-zip '((nil) 0))] (if (zip/end? z) :done (do (println (zip/node z)) (recur (zip/next z))))) Which produces: ((nil) 0) (nil) nil 0 :done On Saturday, December 21, 2013 5:59:16 PM UTC-5, Lee wrote: > On Dec 21, 2013, at 11:49 AM, Lee Spector wrote: > > > > > When I step through a zipper made from a nested list via seq-zip, I get > extraneous nils after processing a nested (). > > > > Is this somehow expected behavior, or a bug, or am I misunderstanding > something fundamental? > > > > The problem seems to arise only when an nested empty list is present, > not other nested lists and not other nested empty sequences (see example at > bottom for this bit). > > I take it back about it working correctly with other nested empty > sequences. I realize now that my example of that had a nested empty vector, > not a sequence. Trying to reproduce that example with a nested empty > sequence just confused me, because it turns out that (seq ()) = (seq []) = > nil, and I'm not sure what that means... But this is all really a > distraction from the case I care about, which is lists that contain (among > other things) nested empty lists. For example, '(() 0). Here it seems to me > that zip/next's behavior is clearly wrong and I'm not sure why or what to > do about it. > > Thanks, > > -Lee -- -- 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 --- You received this message because you are subscribed to the Google Groups "Clojure" group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.