Hi, while studying the collection types and trying to find out which functions work on all collection types (i.e. lists, vectors, maps, sets) I was flabbergasted by the following
user> (contains? (list 1 2 3) 3) false OK, the doc of contains? told me that for indexed collection-types it will only check, whether the index is within the valid range. So maybe: user> (contains? (list 1 2 3) 1) false At that point I dived into the implementation and found that in RT.java checks for the type of collection passed but leaves out PersistenList. I'd like to understand the (probably well-grounded) reason for that. As far as I can see PersistentList extends Counted, so the check for the index-range should at least be possible. However, I think people would expect an equality check in the background, which OTOH would be O (N), probably. Kind regards, Stefan -- 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
