Clojure data structures are immutable by default (see http://clojure.org/functional_programming).
For mutability, see the following: http://clojure.org/vars <http://clojure.org/vars> http://clojure.org/atoms http://clojure.org/refs http://clojure.org/agents http://clojure.org/transients On Thu, Jun 30, 2011 at 11:35 AM, octopusgrabbus <octopusgrab...@gmail.com>wrote: > Given this empty map, > > (def mtr-map {}) > > this sequence, > > (def mtr-seq ["a" 1 "b" 2 "c" 3 "d" 4]) > > this function, > > (defn map-mtr > [read-map premid reading] > (conj read-map {premid reading})) > > and this call > > (map-mtr mtr-map (first mtr-seq) (first (rest mtr-seq))) > > mtr-map won't update, but redefining the function to take premid and > reading and allowing the function to operate on the global variable > mtr-map. > > (defn map-mtr > [premid reading] > (conj mtr-map {premid reading})) > > mtr-map becomes updated. > > I'm confused as to how to update mtr-map by allowing it to be passed > into the function in the first example. > > -- > 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 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
