Ahh, thanks. I was wondering how to specify Collection <https://docs.oracle.com/javase/7/docs/api/java/util/Collection.html><? extends E <https://docs.oracle.com/javase/7/docs/api/java/util/ArrayList.html>>, but looks like just Collection will work.
On Tuesday, January 26, 2016 at 4:57:53 PM UTC-6, Beau Fabry wrote: > > Tell the compiler that the type you're passing to the constructor is a > Collection, so it will know which constructor to use without reflection. > > (set! *warn-on-reflection* true) > => true > (import '(java.util ArrayList Collection)) > => java.util.Collection > (ArrayList. (list 1 2)) > Reflection warning, > /Users/bfabry/Library/Caches/IdeaIC15/tmp/form-init108635367050123227.clj:1:1 > - call to java.util.ArrayList ctor can't be resolved. > => [1 2] > (ArrayList. ^Collection (list 1 2)) > => [1 2] > > > > On Tuesday, January 26, 2016 at 1:56:19 PM UTC-8, Ritchie Cai wrote: >> >> Quoting for small example like I mention is not an issue, but in general, >> I need to pass an vector or list, since that's what I get, in which case I >> cannot quote. >> >> On Tuesday, January 26, 2016 at 3:52:17 PM UTC-6, Michael Willis wrote: >>> >>> What's not practical about quoting? I thought it was considered more >>> idiomatic than doing (list ...) >>> >>> On Sunday, January 17, 2016 at 2:48:29 PM UTC-6, Ritchie Cai wrote: >>>> >>>> Hi all, >>>> >>>> I'm trying to create a Java ArrayList object from a Clojure collection >>>> to pass to another Java API. I get reflection warnings when the elements >>>> are not primitive types, in this case I'm using SparseIndexedVector >>>> class from vectorz library. >>>> >>>> (ArrayList. [c0 c1 c2]) >>>> Reflection warning, *cider-repl localhost*:77:11 - call to >>>> java.util.ArrayList ctor can't be resolved. >>>> >>>> where c0 c1 c2 are of type SparseIndexedVector. Alternatively, I can >>>> create create ArrayList then add elements one by one in a loop. >>>> >>>> (doto (ArrayList.) >>>> (.add c0) >>>> (.add c1) >>>> (.add c2)) >>>> >>>> But I'm wondering if there is away to get rid of the the reflection >>>> warning when calling ArrayList constructor. >>>> >>>> Also, quoting a list will not give reflection warning: >>>> >>>> (ArrayList. '(c0 c1 c2)) ;; no warning >>>> >>>> (ArrayList. (list c0 c1 c2)) >>>> Reflection warning, *cider-repl localhost*:77:11 - call to >>>> java.util.ArrayList ctor can't be resolved. >>>> >>>> However, quoting is not very practical. >>>> >>>> Thanks >>>> Ritchie >>>> >>>> -- 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 unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
