gistfile1.txt

  implicit def columnMap2Map[A, B](map: Map[Array[Byte], Array[Byte]])
    (implicit f: Array[Byte] => A, g: Array[Byte] => B): Map[A, B] = {
    map.foldLeft(Map[A, B]()) { case(map, (k, v)) => 
      val tuple = (k: A, v: B)
      map + tuple
    }
  }
  implicit def byteArray2UUID(bytes: Array[Byte]): UUID = UUID.valueOf(bytes)
  implicit def byteArray2String(bytes: Array[Byte]): String  = new String(bytes)

gistfile2.txt

    val map: Map[org.safehaus.uuid.UUID, String] = test //this fails with error: no implicit argument matching parameter type (Array[Byte]) => B was found.


    val map: Map[org.safehaus.uuid.UUID, String] = columnMap2Map(test) // this works fine