On Sun, Jan 30, 2011 at 12:12 PM, Ken Wesson <[email protected]> wrote: > On Sun, Jan 30, 2011 at 5:36 AM, Shantanu Kumar > <[email protected]> wrote: >> On Jan 30, 2:17 pm, Alexander Yakushev <[email protected]> >> wrote: >>> Why not use a constraint? It looks much cleaner. >>> >>> (defn hello [& {:keys [a b] :as input}] >>> {:pre [(= (set (keys input)) #{:a :b})]} >>> "hello") > > Where is this documented?
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