You can use a ref instead of an atom. And use dosync with multiple alter, so everything is safely inside a transaction. On Feb 16, 2014 2:04 PM, "t x" <txrev...@gmail.com> wrote:
> Hi John, > > Your solution is perfectly valid and optimal for the problem I > described above. > > > Unfortunately, I forgot to mention an additional constraint: sometimes I > do: > > (let [ foo (:some-selector @data-atom) ] > (swap! data-atom update-in [:other-selector] ... )) > > which the -> doesn't quite work on, but my ugly hack above does resolve. > > > The problem being -- I want to update one part of the atom, but it > depends on another part of the atom. > > I ended up with the following hack: > > (defn tswap! [atm func] > (swap! atm > (fn [old] > (let [natm (atom old)] > (func natm) > @natm)))) > > > On Sat, Feb 15, 2014 at 4:09 PM, John D. Hume <duelin.mark...@gmail.com> > wrote: > > On Sat, Feb 15, 2014 at 6:04 PM, t x <txrev...@gmail.com> wrote: > >> > >> > >> (defn what-I-want [] > >> (with-atom some-atom > >> assoc-in ... > >> assoc-in ... > >> update-in ...)) > > > > > > I often do something like this and don't find it too ugly: > > (swap! my-atom #(-> % > > (assoc-in [:k] v) > > (update-in [:k2] inc) > > ,,,)) > > > > -- > > 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.
