scala learning

isSorted.scala

def isSorted[A](as: Array[A], ordered: (A,A) => Boolean): Boolean = {
  def go[A](as: Array[A], ordered: (A, A) => Boolean, acc: Int): Boolean = {
    if (acc == 2) {
      ordered(as(0), as(1))
    } else {
      if (ordered(as(acc - 2), as(acc - 1))) {
        go(as, ordered, acc - 1)
      } else {
        false
      }
    }
  }
  go(as, ordered, as.length)
}