Actually it seems the oddity is that "next" now does the computation instead of "first" in Iterate.java.
On Wed, Apr 1, 2015 at 8:56 PM, Ambrose Bonnaire-Sergeant < abonnaireserge...@gmail.com> wrote: > AFAICT there is consistently one extra call, which seems to suggest an > off-by-one error in the IReduce implementation of Iterate. > > ;; 1.6 > user=> (take 11 (iterate (fn [a] (prn (str "PR" a)) (inc a)) 1)) > "PR1" > "PR2" > "PR3" > "PR4" > "PR5" > "PR6" > "PR7" > "PR8" > "PR9" > "PR10" > (1 2 3 4 5 6 7 8 9 10 ...) > > ;; 1.7.0-alpha6 > user=> (take 11 (iterate (fn [a] (prn (str "PR" a)) (inc a)) 1)) > "PR1" > "PR2" > "PR3" > "PR4" > "PR5" > "PR6" > "PR7" > "PR8" > "PR9" > "PR10" > "PR11" > (1 2 3 4 5 6 7 8 9 10 ...) > > Thanks, > Ambrose > > On Wed, Apr 1, 2015 at 8:50 PM, Matching Socks <phill.w...@gmail.com> > wrote: > >> Ambrose, does that "iterate" result arise from chunking? "iterate" is >> advertised as producing an infinite lazy sequence. While a suddenly >> chunking "iterate" will no doubt smoke out some cases like this, doesn't it >> seem that they are abuses? It's not quite spot-on to employ "take" or >> "take-while" outside the "iterate" as a loop-ending nanny for sequences >> that could not genuinely be infinite. The "take" should be concerned with >> what the consumer wants to consume, not preoccupied with what the producer >> will be able to produce. >> >> -- >> 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/d/optout. >> > > -- 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/d/optout.
