Bit array string representation of a Scala BitSet

BitMaskExtensions.scala

implicit class BitMaskExtensions(bitSet: BitSet) {
  def toBitArrayString: String = {
    val seq = (0 to bitSet.max) map { x => if (bitSet.contains(x)) "1" else "0"}

    "[" + seq.mkString(",") + "]"
  }
}