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 > <javascript:>> 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 >> <javascript:> >> 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 <javascript:> >> 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 <javascript:>. >> 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.
