Basic Ring Buffer

BasicRingBuffer.md

class RingBuffer[T] {
  val array = new Array[T](5)
  var count = 0

  override def toString: String = array.mkString(",")

  def add(value: T): RingBuffer[T] = {
    if (count < array.length) {
      array(count) = value
    } else {
      val newIndex = count % array.length
      array(newIndex) = value
    }

    count = count + 1

    this
  }

}

object RingBuffer {
  def apply[T]() = new RingBuffer[T]()
  def forInts = apply[Int]()
}

val rb = RingBuffer forInts

rb add 6  //RB = 6,0,0,0,0
rb add 7  //RB = 6,7,0,0,0
rb add 8  //RB = 6,7,8,0,0
rb add 9  //RB = 6,7,8,9,0
rb add 10 //RB = 6,7,8,9,10
rb add 11 //RB = 11,7,8,9,10
rb add 12 //RB = 11,12,8,9,10
rb add 13 //RB = 11,12,13,9,10
rb add 14 //RB = 11,12,13,14,10
rb add 15 //RB = 11,12,13,14,15