As of Clojure 1.3 you need to mark things you with to re-bind explicitly as dynamic:
(defn ^:dynamic twice [x] ...) On Tue, Oct 30, 2012 at 7:42 PM, Satoru Logic <satorulo...@gmail.com> wrote: > Hi, all. > > I am reading Clojure in Action. > > In the "scope" section of Chapter3, there are examples like this: > > defn twice [x] > (println "original function") > (* 2 x)) > > (defn call-twice [y] > (twice y)) > > (defn with-log [function-to-call log-statement] > (fn [& args] > > (println log-statement) > (apply function-to-call args))) > > > > (call-twice 10) > > > > (binding [twice (with-log twice "Calling the twice function")] > (call-twice 20)) > > > > (call-twice 30) > > > When I tried to run this code in repl, I got the following exception: > > >> IllegalStateException Can't dynamically bind non-dynamic var: user/twice >> clojure.lang.Var.pushThreadBindings (Var.java:353) > > > Is the book wrong or I'm running with the wrong version of clojure? > > > > > > > -- > 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
