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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