On Dec 27, 2009, at 22:33 , Meikel Brandmeyer wrote: > Checking for nil here is independent on the contents of the lists. The `(map > seq lists)` first turns everything in lists into a seq. If a collection is > empty it will be turned into nil. This nil is independent of any contained > nil of any other collection at that point in the iteration. The second point > where nil shows up is fnil. first returns nil when it gets passed nil. We > have to modify it to return the default in that case. However the passed nil > is again from the seq itself not the contents. So contained nils are not a > problem at all. > > user=> (extend-tupel :x [1 nil 3] [4 5 6 7]) > ((1 4) (nil 5) (3 6) (:x 7))
Ah sorry, you're right, I misinterpreted fnil wrong :) so yes, that is really way nicer :) thanks for the hint to fnil too, so it seems not to be in the stable clojure yet :( too sad, but copy & paste from your link does :D. Best regards, Heinz -- 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
