The example is wrong. There are now two flavors of support for reduce through interfaces, IReduce and IReduceInit. The first one allows you to call reduce without an initial value. Eduction doesn't support that interface, but only IReduceInit. Reduce without an initial value is now discouraged.
On Tuesday, June 30, 2015 at 1:04:20 PM UTC-4, Вук Мировић wrote: > > As Clojure 1.7 is finally released, I tried to wet my feet with > transducers. > I tried eduction example from official site http://clojure.org/transducers > <http://www.google.com/url?q=http%3A%2F%2Fclojure.org%2Ftransducers&sa=D&sntz=1&usg=AFQjCNGAIDS1RcAkD0WaPpJg2sgEoA4Suw> > > but it's not working: > > user=> (def xf (comp (filter odd?) (map inc))) > #'user/xf > user=> (def iter (eduction xf (range 5))) > #'user/iter > user=> (reduce + iter) > ClassCastException clojure.core.Eduction cannot be cast to > clojure.lang.IReduce > clojure.core.protocols/fn--6502 (protocols.clj:75) > ;; 6 expected > > But > > user=> (reduce + 0 iter) > 6 > > So is example wrong or this is a bug? > -- 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.
