Ah! I knew there was a way to do it via iterate, but it was 9:30pm at the time and I was tired. Nice example though.
On Tue, Dec 13, 2016 at 10:03 PM, Ghadi Shayban <gshay...@gmail.com> wrote: > A common way to do it in Clojure is `iterate`, no macros necessary. As of > Clojure 1.7 this doesn't allocate a list at all if you reduce/fold over it: > (iterate #(+ % 2) 4) > > > On Tuesday, December 13, 2016 at 11:27:28 PM UTC-5, tbc++ wrote: >> >> I'm not aware of such a construct, but it's trivial enough to write >> something like this using `range` or perhaps write a function that will >> yield a lazy seq: >> >> (defn inf-list >> ([x y] >> (cons x (cons y (inf-list x y 2)))) >> ([x y c] >> (cons (+ x (* c (- y x))) >> (lazy-seq (inf-list x y (inc c)))))) >> >> No macros required >> >> On Tue, Dec 13, 2016 at 9:14 PM, bill nom nom <hellomot...@gmail.com> >> wrote: >> >>> In Haskell, I can get an infinite lazy list that is incremented by two >>> by, starting at 4 >>> [4,6..] >>> >>> which yields the result >>> [4,6,8,10...] >>> >>> the more general form >>> [x,y..] produces [x, x + (y-x), x + 2 * (y-x), x + 3 * (y-x)...] >>> >>> Is there a way to make a macro of this in clojure, or is there something >>> already as elegant? >>> >>> -- >>> You received this message because you are subscribed to the Google >>> Groups "Clojure" group. >>> To post to this group, send email to clo...@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+u...@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+u...@googlegroups.com. >>> For more options, visit https://groups.google.com/d/optout. >>> >> >> >> >> -- >> “One of the main causes of the fall of the Roman Empire was that–lacking >> zero–they had no way to indicate successful termination of their C >> programs.” >> (Robert Firth) >> > -- > 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. > -- “One of the main causes of the fall of the Roman Empire was that–lacking zero–they had no way to indicate successful termination of their C programs.” (Robert Firth) -- 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.
