If you want to capture the binding and have laziness together you can also use `bound-fn`.
(binding [*funkybind* true] (map (fn [_] *funkybind*) [0 1])) ;=> (false false) (binding [*funkybind* true] (map (bound-fn [_] *funkybind*) [0 1])) ;=> (true true) On Tue, Apr 23, 2013 at 11:52 AM, Travis Vachon <travis.vac...@gmail.com>wrote: > 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. > > > -- -- 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.
