He's repeating a function argument, not a function. Meikel is correct that the second expression causes (some #{0} ...) to return nil when number is not a multiple of 3 or 5, and then zero? fails. As he suggests...
(reduce + (filter (fn [number] (some zero? (map mod (take 2 (repeat number)) [3 5]))) (range 1 1000))) ...works (and returns 233168) Sean On Sun, Dec 23, 2012 at 11:56 PM, Marko Topolnik <marko.topol...@gmail.com>wrote: > *repeat* is not supposed to work with functions, but there's *repeatedly.* > > > On Monday, December 24, 2012 4:20:23 AM UTC+1, Andrew Care wrote: >> >> I'm trying to use repeat with a function argument. This works: >> >> (reduce + (filter (fn [number] (zero? (some #{0} (map mod (take 2 (repeat >> 9)) [3 5])))) (range 1 1000))) >> >> This doesn't: >> >> (reduce + (filter (fn [number] (zero? (some #{0} (map mod (take 2 (repeat >> number)) [3 5])))) (range 1 1000))) >> >> Why can I use (repeat 9) and not (repeat number)? >> > > -- 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