alexamorales

def distinctBy[A, B](f: A => B)(list: List[A]): Iterable[A] =
  list.zip(list.map(f))
    .groupBy { case (_, k) => k }
    .values
    .filter(_.size == 1)
    .map(_.headOption)
    .collect { case Some((e, _)) => e }

def duplicatesBy[A, B](f: A => B)(list: List[A]): List[A] =
  list.diff(distinctBy(f)(list).toList).distinct

alexamorales

object BCDDate {

  /**
    * Method creates local date from BCD (https://en.wikipedia.org/wiki/Binary-coded_decimal) encoded hex string
    *
    * @param bcdDate HEX representation of BCD date
    * @return local date instance
    */
  def apply(bcdDate: HexString): Try[LocalDate] =
    Try {