Write a program to determine the largest sum of contiguous integers in a list.

Sum of Integer

def largestSum(ns: List[Int]): Int ={
    def sum(numbers: List[Int]) = numbers.foldLeft(0)((a,b) => a+ b)

    @tailrec def loop(numbers: List[Int], large: Int): Int = numbers match{
      case Nil => large
      case _ => {
        val thisSum = sum(numbers)
        if(thisSum > large)
          loop(numbers.tail, thisSum)
        else
          loop(numbers.tail,large)
      }
    }
    
    (for{
          i <- 1 to ns.length
    			window <- ns.sliding(i)
    } yield loop(window.tail, sum(window))).max
     
  }