I haven't taken the time to check whether that is correct or not, but the answer that is most likely the truth is "no one has yet had the time or interest to add such a thing yet".
You are welcome to create a ticket describing the problem, and attach a patch to it that fixes the issue, and see if it will be accepted as a change to Clojure. To have a patch accepted you will need to sign a Clojure Contributor's Agreement first [1], and [2] describes the mechanics of creating patches. [1] http://clojure.org/contributing [2] http://dev.clojure.org/display/design/JIRA+workflow Andy On Dec 28, 2012, at 5:36 PM, Alan Busby wrote: > > Just curious why something like the following wouldn't be part of subvector? > > public Object kvreduce(IFn f, Object init){ > > for(int i=0;i<(end - start);i++){ > > init = f.invoke(init,i,v.nth(start+i)); > > return init; > > } > > > > On Fri, Dec 28, 2012 at 11:23 PM, Andy Fingerhut <andy.finger...@gmail.com> > wrote: > I am not saying that one would *have* to give up O(1) subvec in order to > support other operations. > > I am guessing, without having done a thorough analysis, that an O(log n) > subvec based on RRB Trees would make most/all operations on subvec's just > fall out fairly naturally, rather than having to be written as special cases. > > Andy > > On Dec 27, 2012, at 8:54 PM, Alan Busby wrote: > >> I'm confused why we'd need to give up O(1) just to support something like >> reduce-kv on subvectors. >> Isn't the implementation of subvector just a wrapper around the original >> vector along with a start and end value? >> >> Current source here; >> https://github.com/clojure/clojure/blob/master/src/jvm/clojure/lang/APersistentVector.java >> >> I apologize if I'm missing something key here. >> >> >> On Fri, Dec 28, 2012 at 3:18 AM, Andy Fingerhut <andy.finger...@gmail.com> >> wrote: >> http://dev.clojure.org/jira/browse/CLJ-1082 > > > -- > 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 > > > -- > 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 -- 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
