import collection._



object Test {

  def compare(s1: String, s2: String): Unit = {
    assert(s1 == s2, s1 + "\nvs.\n" + s2)
  }

  def main(args: Array[String]): Unit = {
    compare(List(1, 2, 3, 4).aggregate(new java.lang.StringBuffer)(_ append _, _ append _).toString, "1234")
    compare(List(1, 2, 3, 4).par.aggregate(new java.lang.StringBuffer)(_ append _, _ append _).toString, "1234")
    compare(Seq(0 until 100: _*).aggregate(new java.lang.StringBuffer)(_ append _, _ append _).toString, (0 until 100).mkString)
    compare(Seq(0 until 100: _*).par.aggregate(new java.lang.StringBuffer)(_ append _, _ append _).toString, (0 until 100).mkString)
  }

}