ugly-parse.scala

  private val groupCharacters = Set('(', '[', '{', '"')
  private val groupEndings = Map('(' -> ')', '[' -> ']', '{' -> '}', '"' -> '"')
  private def parseWords(s: String): List[String] = {
    val b = new StringBuilder
    var open = List.empty[Char]
    val words = ListBuffer.empty[String]
    s.foreach {
      case ' ' if open.isEmpty => {
        if (b.nonEmpty) {
          words += b.toString()
          b.clear()
        }
      }
      case c if open.nonEmpty && groupEndings(open.head) == c => {
        b.append(c)
        open = open.tail
      }
      case c if groupCharacters.contains(c) => {
        b.append(c)
        open = c :: open
      }
      case c => b.append(c)
    }
    if (b.nonEmpty) {
      words += b.toString()
    }
    words.toList
  }