hex2bytes and bytes2hex fixed

HexBytesUtil.scala

object HexBytesUtil {

  def hex2bytes(hex: String): Array[Byte] = {
    hex.replaceAll("[^0-9A-Fa-f]", "").sliding(2, 2).toArray.map(Integer.parseInt(_, 16).toByte)
  }

  def bytes2hex(bytes: Array[Byte], sep: Option[String] = None): String = {
    sep match {
      case None => bytes.map("%02x".format(_)).mkString
      case _ => bytes.map("%02x".format(_)).mkString(sep.get)
    }
    // bytes.foreach(println)
  }

  def example {
    val data = "48 65 6C 6C 6F 20 57 6F 72 6C 64 21 21"
    val bytes = hex2bytes(data)
    println(bytes2hex(bytes, Option(" ")))

    val data2 = "48-65-6C-6C-6F-20-57-6F-72-6C-64-21-21"
    val bytes2 = hex2bytes(data2)
    println(bytes2hex(bytes2, Option("-")))

    val data3 = "48656C6C6F20576F726C642121"
    val bytes3 = hex2bytes(data3)
    println(bytes2hex(bytes3))
  }

}

def bytes2Hex(bytes: Array[Byte], sep: Option[String] = None): String = {
bytes.map("%02x".format(_)) mkString (sep match {
case None => ""
case Some(s) => s
})
}

def bytes2hex(bytes: Array[Byte], sep: Option[String] = None): String =
bytes.map("%02x".format(_)).mkString(sep.getOrElse(""))

def bytes2hex(bytes: Array[Byte], sep: String = ""): String = bytes.map("%02x".format(_)).mkString(sep)

def hex2X[T](hex: String, f: BigInt => T) = f(BigInt(hex.drop(2), 16))
def hex2Bytes(hex: String): Array[Byte] = hex2X(hex, _.toByteArray)
works for e.g. 0xEEAA prepended 0x