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+
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+quickSort :: Ord a => [a] -> [a]
+quickSort [] = []
+quickSort (x:xs) =
+ let less = [ a | a <- xs, a < x ]
+ equal = [ b | b <- (x:xs), b == x ]
+ greater = [ c | c <- xs, c > x ]
+ in quickSort less ++ equal ++ quickSort greater
+
+