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Last active December 16, 2015 09:58
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gistfile1.hs
mapReduce :: (k1 -> v1 -> [(k2, v2)]) -- The Map function
-> (k2 -> [v2] -> Maybe v3) -- The Reduce function
-> Map k1 v1 -- a key to input - value mapping
-> Map k2 v3 -- a key to output - value mapping
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