On Dec 26, 2009, at 21:09 , Meikel Brandmeyer wrote: > Here is a more idiomatic (and fully lazy) version using the fnil function > proposed by Rich here: > http://groups.google.com/group/clojure/msg/f251cfd9baab440a > > (defn extend-tupel > [default & lists] > (lazy-seq > (let [seqs (map seq lists)] > (when (some identity seqs) > (cons (map (fnil first default) seqs) > (apply extend-tupel default (map rest seqs))))))) > > Sincerely > Meikel > I didn't checked for nil but for empty? on purpose, nil might also be a value in a list - I know it's will not be common but a list that has '(nil 1 2 3) would become '(<default> 1 2 3) if checking for nil and not empty. So your approach to wrap the lazy seq around it all is a good idea and makes the whole thing much nicer :).
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
