Wait. Should be: (defn f [& args] (let [default-args-atom (atom {:a 1 :b 2 :c 3 :d 4}) kwds (vec [:a :b :c :d) kwargs (map-indexed (fn [idx arg] (if (keyword? arg) (swap! default-args-atom assoc arg (get args (inc idx))) (swap! a assoc (get kwds idx) arg))) args)] (function-that-actually-does-what-i-want-to-do (:a @default-args-atom) (:b @default-args-atom) (:c @default-args-atom) (:d @default-args-atom)))
because there's no guarantee that (vec (keys @default-args-atom)) will return the keys in the same order. On Sunday, July 20, 2014 8:45:02 PM UTC-4, Sam Raker wrote: > > I hacked this together: > > (defn f [& args] (let [default-args-atom (atom {:a 1 :b 2 :c 3 :d 4}) kwds > (vec (keys @default-args-atom)) > kwargs (map-indexed (fn [idx arg] (if > (keyword? arg) (swap! default-args-atom assoc arg (get args (inc idx))) > (swap! a assoc (get kwds idx) arg))) args)] > (function-that-actually-does-what-i-want-to-do (:a @default-args-atom) > (:b @default-args-atom) (:c @default-args-atom) (:d @default-args-atom))) > > But it seems kind of gross to me. Is there a cleaner solution? > > On Sunday, July 20, 2014 8:16:55 PM UTC-4, Alex Baranosky wrote: >> >> You can get keyword args like this: >> >> (defn f [& {:keys [a b c d] >> :or {a 1 b 2 c 3 d 4}}] >> [a b c d]) >> >> But you cannot also get the ability to call: >> (f 5 6 7 8) >> >> >> On Sun, Jul 20, 2014 at 4:13 PM, Sam Raker <sam....@gmail.com> wrote: >> >>> I'm trying to write a function that takes (up to) 4 arguments. I want to >>> be able to supply every argument positionally, with a keyword or as a >>> default, so that >>> >>> (f) >>> (f 1) >>> (f 1 2) >>> (f 1 2 3) >>> (f 1 2 3 4) >>> (f 1 :b 2) >>> (f 1 2 :c 3) >>> ... >>> (f :a 1 :b 2 :c 3 :d 4) >>> >>> are all equivalent. In Python, I could do this by >>> >>> def f(a=1,b=2,c=3,d=4):... >>> >>> but I'm not sure how to do it in Clojure. >>> >>> -- >>> You received this message because you are subscribed to the Google >>> Groups "Clojure" group. >>> To post to this group, send email to clo...@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+u...@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+u...@googlegroups.com. >>> For more options, visit https://groups.google.com/d/optout. >>> >> >> -- 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/d/optout.