Hi Geoff,
You probably want a sorted-map-by:
user=> (sorted-map-by (fn [a b] (or (when (every? coll? [a b]) (when (= a
(reverse b)) 0)) -1)) [1 2] 42 [2 1] 42)
{[1 2] 42}
Thanks,
Ambrose
On Fri, Jul 25, 2014 at 9:52 AM, Geoff Little <fifos...@gmail.com> wrote:
> I'm attempting to proxy PersistentHashmap so that "get"ting an existing
> key or its reverse returns the same value.
>
> Here's the code that I have
>
> (defn sym-key-hash-map []
> (proxy [clojure.lang.PersistentHashMap] [nil 0 nil false nil]
> (valAt [key]
> (or (proxy-super valAt key)
> (proxy-super valAt (reverse key))))))
>
> (let [key (list 1 2)]
> (get (assoc (sym-key-hash-map) key "sweet")
> (reverse key)))
>
> But unfortunately, the test code returns nil instead of "sweet".
>
> Does anyone with knowledge of proxy and PersistentHashmap know how to
> solve this?
>
> Thanks.
>
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