On Wed, Mar 28, 2012 at 7:16 PM, Timothy Baldridge <tbaldri...@gmail.com> wrote: > "May be delayed" > > But I don't think they ever are: > > user=> (def oddseq (map #(do (print %) %) (range 30))) > #'user/oddseq > > user=> (defn foo [& args] 'd) > #'user/foo > > user=> (apply foo oddseq) > 01234567891011121314151617181920212223242526272829d > > user=> (def oddseq (map #(do (print %) %) (range 1))) > #'user/oddseq > > user=> (apply foo oddseq) > 0d > > user=> > > I don't think it's possible to ever have apply not evaluate all its > arguments? I think this is what Nathan was saying. Given the above > example, is there anyway to not have the side effects automatically > run when invoking apply?
Range is chunked, and I think the map-generated sequence inherits that. On the other hand, I thought the chunk size was 16, and that it didn't matter anyway if no element was ever requested. On the gripping hand, (apply f x) calls (seq x), which realizes the first element (and thus the first chunk, for chunked seqs) to determine if x is empty and it should therefore return nil. -- 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
