Hi Daniel map is creating a lazy seq, which isn't evaluated until the REPL's forces it to be printed, which is outside the scope of the binding.
This: (binding [*funkybind* true] (doall (map (fn [_] *funkybind*) [1 2]))) forces evaluation inside the binding, and does what you want. This is something I've been bitten by a few times, but the power that lazyness brings ends up being worth it, IMHO. Good luck! Travis On Mon, Apr 22, 2013 at 9:41 PM, Daniel Higginbotham <nonrecurs...@gmail.com> wrote: > I've encountered a situation where the binding function doesn't work as I > expect it: > > user> (def ^:dynamic *funkybind* false) > > ;; expected > user> (binding [*funkybind* true] > *funkybind*) > true > > ;;expected > (binding [*funkybind* true] > ((fn [] *funkybind*))) > true > > ;;... huh? > (binding [*funkybind* true] > (map (fn [_] *funkybind*) [1 2])) > (false false) > > In the last example, why is the value of *funkybind* false instead of true? > > Thanks! > Daniel > > -- > -- > 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/groups/opt_out. > > -- -- 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/groups/opt_out.
