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?
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