Makes a clojure Map from a given coll.

mkhash.clj

(defn mkhash
    "Makes a clojure map from a given collection. C should have an even
    number of elements"
    [c]
    {:pre [(even? (count c))]}
    (loop [m {} coll c]
      (if (empty? coll)
         m
        (recur
          (assoc m (first coll) (second coll))
          (nnext coll)))))