fun.scala

private def recvAll(accum: Int): Array[Byte] = {
  @tailrec def recvAllBuf(response: Array[Byte], acc: Int): Array[Byte] = {
    val character = in.read()
    val responseArray = response :+ character.toByte
    acc match {
      case 0 => responseArray
      case _ => recvAllBuf(responseArray, acc - 1)
    }
  }

  recvAllBuf(Array[Byte](), accum - 1)
}