Wait. Should be:
(defn f [& args] (let [default-args-atom (atom {:a 1 :b 2 :c 3 :d 4}) kwds
[: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 (vec (keys @default-args-atom)) will return
the keys in the same order every time.
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.
