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gfredericks/set_dynamic.clj

Last active August 29, 2015 13:56
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pitfalls of changing a var to be dynamic
Raw
set_dynamic.clj
user> (def x 1)
#'user/x
user> (defn get-x [] x)
#'user/get-x
user> (binding [x 2] (get-x))
IllegalStateException Can't dynamically bind non-dynamic var: user/x clojure.lang.Var.pushThreadBindings (Var.java:320)
user> (.setDynamic #'x)
#'user/x
user> (binding [x 2] (get-x))
1
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