Dot product calc

gistfile1.scala

def dot(first: Array[Array[Double]], second: Array[Int]): Array[Double] = {
    val result = new Array[Double](first.size)
    for (i <- 0 to (first.size - 1)) {
      result(i) = dotProduct(first(i), second)
    }
    return result
  }

  def dotProduct(first: Array[Double], second: Array[Int]): Double = {
    require(first.size == second.size)
    (for ((a, b) <- first zip second) yield a * b) sum
  }