Counting bounded slice codility

Question

I have recently attended a programming test in codility, and the question is to find the Number of bounded slice in an array..

I am just giving you breif explanation of

Answer 1

I came up with a solution in Scala:

package test
import scala.collection.mutable.Queue

object BoundedSlice {

  def apply(k:Int, a:Array[Int]):Int = {
    var c = 0
    var q:Queue[Int] = Queue()
    a.map(i => {           
      if(!q.isEmpty && Math.abs(i-q.last) > k) 
        q.clear
      else
        q = q.dropWhile(j => (Math.abs(i-j) > k)).toQueue      
      q += i
      c += q.length
    })
    c
  }

  def main(args: Array[String]): Unit = {
    val a = Array[Int](3,5,6,7,3)
    println(BoundedSlice(2, a))
  }
}