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

What about this, if an empty subarray is allowed or the input array cannot be all negative:

numbers.scanLeft(0)((acc, n) => math.max(0, acc + n)).max

Or, failing the conditions above this (which assumes the input is non-empty):

numbers.tail.scanLeft(numbers.head)((acc, n) => (acc + n).max(n)).max