Haskell Quiz/Maximum Sub-Array/Solution Jkramar

maxSubArray xs = drop from$take to xs where
  sums = zip (scanl (+) 0 xs) [0..]
  diff ((a,ai),(b,bi)) = (a-b,(bi,ai))
  (from,to) = snd$maximum$map diff$zip sums$scanl1 min sums