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dermatthias/sweeeeeeeeeet! :)

Created November 27, 2009 15:14
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sweeeeeeeeeet! :)
(defn euclidean
"berechnet den (modifizierten) euklidischen abstand zwischen zwei usern"
[active other]
(Math/sqrt (reduce + (map (fn [movie]
(let [features (item-map movie)]
(reduce + (map (fn [feat] (diff active other movie feat)) features)) ))
(common-items active other)))))
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