You win sir. That is the most beautiful way.
sincerely,
--Robert McIntyre
On Sun, Jan 30, 2011 at 7:59 PM, Bill James <w_a_x_...@yahoo.com> wrote:
> Alexander Yakushev wrote:
>> Why not use a constraint? It looks much cleaner.
>>
>> (defn hello [& {:keys [a b] :as input}]
>> {:pre [(= (set (keys input)) #{:a :b})]}
>> "hello")
>>
>> You can learn more about constraints here:
>> http://vimeo.com/channels/fulldisclojure#8399758
>
>
> {:pre [(clojure.set/subset? (set (keys input)) #{:a :b})]}
>
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