Now that I've read your e.g. a couple more times you seem to want to change the value of atom in foo. So first since you def the atom, there is no need to pass it to foo. Second when trying to see the value of the atom you deref it with @ and if you want to change it you use swap!, reset! or compare-and-set!
This page has more explanations/examples http://clojure.org/atoms Hope that helps On Jan 18, 11:37 am, MiltondSilva <shadowtr...@gmail.com> wrote: > Not sure if I understand your question/problem but, this: > > "How can I avoid the binding of changeling to the initial value of the > atom and have the anonymous function passed to map use the current > (possibly changed) value of changeling? " > > You are binding a reference not the actual value of the atom. To pass > the value you would deref it with '@' -> #(foo % @changeling) > > On Jan 18, 10:44 am, Andreas Kostler > > <andreas.koestler.le...@gmail.com> wrote: > > Hi all, > > Suppose I have the following function: > > (defn foo [x changeling] > > (cond > > (= (first x) 'bar) > > (map #(foo % changeling) (rest x)))) > > > (def foobar (atom {:something "in-here"})) > > > Now, changeling gets bound to (atom {:something "in-here"}). The > > conditional in foo might contain another case that actually changes > > changeling. > > How can I avoid the binding of changeling to the initial value of the > > atom and have the anonymous function passed to map use the current > > (possibly changed) value of changeling? > > E.g. x is a list of functions working on changeling like (bar (add-to- > > changeling :something :else) (do-something-with-changeling)). So bar > > causes each of the elements of (rest x) to evaluate. add-something-to- > > changeling adds stuff to changeling, do-something-with-changeling does > > work depending on the recently added stuff. > > Andreas -- 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
