How to convert a String into Base36

String2Base36

  def toBase36(str: String): Long = {
    var id: Long = 0
    for (c <- str) {
      val d = if (c.isDigit) c.toInt - '0'.toInt
      else c.toInt - 'A'.toInt + 10
      id = (id * 36) + d
    }
    id
  }
  def fromBase36(idp: Long): String = {
    var id = idp
    if (id == 0) {
      "0"
    } else {
      var str = ""
      while (id > 0) {
        val d = id % 36
        val c = if (d >= 0 && d <= 9) {
          (d + '0').toChar
        } else {
          (d - 10 + 'A').toChar
        }
        str = c + str
        id /= 36
      }
      str
    }
  }