scala3-RepeatedParameters.scala

def count[T](ts: T*): Int = ts.size
val seq = Seq(1,2,3)
count(seq)          // Returns 1!
count(seq*)         // Returns 3. Use seq* instead of seq: _*

Seq('a', 'b', 'c', 'd', 'e') match {
  case Seq('a', tail*) => s"Found a, $tail"   // Instead of Seq('a', tail: _*)
  case Seq('b', _*) => "Found b"              // Instead of Seq('a', _: _*)
  case seq => s"Other list: $seq"
}