Keywords implement IFn meaning they can act as functions that look themselves up in a map. Strings are just strings. Replace "b" with (get "b") and you'll get the behavior you're looking for.
Dave On Thu, May 31, 2012 at 7:55 AM, Boris V. Schmid <boris.sch...@gmail.com> wrote: > Can someone tell me what I'm overlooking (clojure 1.4) > > (-> (hash-map :b (hash-map :a 3)) :b :a) > 3 > user> (-> (hash-map "b" (hash-map :a 3)) "b" :a) > ; Evaluation aborted: java.lang.String cannot be cast to clojure.lang.IFn > > I'm not sure why the first can work, and the second cannot. Is it a logical > limitation of the language, or an oversight in how the macro -> is build? > > -- > 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
