2015-02-18 0:28 GMT+01:00 Steve Miner <[email protected]>: > > > On Feb 17, 2015, at 4:39 PM, Colin Jones <[email protected]> wrote: > > > > Sounds almost like a mirror image of `clojure.core/take-nth`, so > something like this is kind of fun: > > > > (defn drop-nth [n coll] > > (lazy-seq > > (when-let [s (seq coll)] > > (concat (take (dec n) s) (drop-nth n (drop n s)))))) > > > > I like that drop-nth. Here's my version of lucky: > > (defn lucky > "Returns sequence of Lucky numbers less than max" > ([max] (when (pos? max) (lucky 1 (range 1 max 2)))) > ([i acc] > (if-let [n (nth acc i nil)] > (recur (inc i) (drop-nth n acc)) > acc))) > > The recur in this case loops back to the top. >
It looks good, but with 1000000 I get a stack overflow. And even with 100000. It takes also about two times as long to execute. -- Cecil Westerhof -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to [email protected] Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to [email protected] 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 [email protected]. For more options, visit https://groups.google.com/d/optout.
