Oh that is confusing! nth indexes from 0 where-as take-nth indexes from 1. The doc string could be considered misleading, as it says that take- nth makes a sequence of "nth" items, but clearly it does not: clojure.core/take-nth ([n coll]) Returns a lazy seq of every nth item in coll.
user=> (take-nth 1 [1 2 3 4]) (1 2 3 4) user=> (nth [1 2 3 4] 1) 2 On Oct 28, 7:36 am, alxtoth <alexandru.t...@gmail.com> wrote: > Hi, > > Started tinkering with Clojure, and wonderring why (take-nth 0 (range > 10)) returns an infinite sequence .. Is this really the expected > behaviour? > > ; > ;code bellow is public domain > ; > (defn take-nth-proposal > "Returns a lazy seq of every nth item in coll . Or nil if n less > than 1." > [n coll] > (if (< n 1) > nil > (lazy-seq > (when-let [s (seq coll)] > (cons (first s) (take-nth n (drop n s))))))) > > -Cheers, Alex --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
