I often have the need to lazily iterate over rests of lists rather than elements. I frequently saw discussions about this topic. In CL it's called * maplist*, in Haskell it's *tails* (Scala missing?). Of course there are several methods to do this, e.g. (take-while identity (iterate next S)), but if you use them recursivly, code reads badly. So my proposal would be to have a kind of following function in the core:
(defn maplist ([s] (maplist identity s)) ([f s] (when-let [s (seq s)] (lazy-seq (cons (f s) (maplist f (next s))))))) ;(maplist [1 2 3]) -> ((1 2 3) (2 3) (3)) Questions: 1. Would such a method help more developers? 2. Is there a conceptional reason, to omit a maplist equivalent in Clojure? Thanks, Marc -- 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
