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amalloy/gist:1542246

Created December 31, 2011 00:43
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gistfile1.clj
(defn- lookup-edge [edges label]
(get edges label (edges :default)))
(defn- merge-nfa-edges [& edge-maps]
(into {}
(for [label (set (mapcat keys edge-maps))]
[label (apply union
(for [edges edge-maps]
(or (lookup-edge edges label) #{})))])))
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