I like cyclefn too. I thought of something like that too, but my reason for preferring https://github.com/rplevy/funcycle/blob/master/src/fun/cycle.clj over it was only that if you aren't careful and you hang onto the produced function, you might get some unwanted non-determinism.
On Mon, Nov 17, 2014 at 11:14 PM, Andy L <core.as...@gmail.com> wrote: > Thanks for all the ideas. I like cyclefn the most, a bit of investment > resulting in super clean output. > > Andy > > On Sat, Nov 15, 2014 at 9:35 AM, Ben Wolfson <wolf...@gmail.com> wrote: > >> or >> >> (defn enumerate [xs] (map vector (range) xs)) >> >> (defn altsum [n] (reduce (fn [acc [i f]] (f acc (inc i))) >> 0 >> (take n (enumerate (cycle [+ -]))))) >> >> >> >> On Fri, Nov 14, 2014 at 3:41 PM, Andrew Oberstar <ajobers...@gmail.com> >> wrote: >> >>> How about this? >>> >>> (defn cyclefn >>> [& fs] >>> (let [fcycle (cycle fs) >>> rem-fs (atom fcycle)] >>> (fn [& args] >>> (let [f (first @rem-fs)] >>> (swap! rem-fs rest) >>> (apply f args))))) >>> >>> (reduce (cyclefn + -) (range 1 100)) >>> >>> cyclefn could be used to cycle through any set of functions you want and >>> the result used as if it was a normal function. >>> >>> >>> Andy >>> >>> On Fri, Nov 14, 2014 at 7:16 AM, Henrik Lundahl < >>> henrik.lund...@gmail.com> wrote: >>> >>>> How about this? :-) >>>> >>>> (defn altsum [n] (/ (if (odd? n) (+ 1 n) (- n)) 2)) >>>> >>>> -- >>>> Henrik >>>> >>>> >>>> On Fri, Nov 14, 2014 at 1:48 PM, Gary Verhaegen < >>>> gary.verhae...@gmail.com> wrote: >>>> >>>>> What about cheating a bit? >>>>> >>>>> (interleave >>>>> (iterate #(+ % 2) 1) >>>>> (iterate #(- % 2) -2)) >>>>> >>>>> Then take n, reduce +, or whatever else you might want to do with the >>>>> series. >>>>> >>>>> -- >>>>> 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. >>>> >>> >>> -- >>> 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. >>> >> >> >> >> -- >> Ben Wolfson >> "Human kind has used its intelligence to vary the flavour of drinks, >> which may be sweet, aromatic, fermented or spirit-based. ... Family and >> social life also offer numerous other occasions to consume drinks for >> pleasure." [Larousse, "Drink" entry] >> >> -- >> 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. > -- 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.
