Kadane's Algorithm in Scala

Question

Does anyone have a Scala implementation of Kadane\'s algorithm done in a functional style?

Edit Note: The definition on the link has changed in a way that invali

Answer 1

I prefer the folding solution to the scan solution -- though there's certainly elegance to the latter. Anyway,

numbers.foldLeft(0 -> 0) {
  case ((maxUpToHere, maxSoFar), n) =>
    val maxEndingHere = 0 max maxUpToHere + n
    maxEndingHere -> (maxEndingHere max maxSoFar)
}._2