bracket balanicing

brackets.scala

object Main extends App {

  println(isBalanced("(.)(.)".toList))

  def isBalanced(list: List[Char]) = {
    @annotation.tailrec
    def countBracets(string: List[Char], count: Int = 0): Int = {
      string match {
	case '('::tail => countBracets(tail, count+1)
	case ')'::tail => countBracets(tail, count-1)
	case x::tail   => countBracets(tail, count) // just skip if not bracet
	case Nil => count
	}
     }

    countBracets(list) == 0
  }
}