急！！！求大神写一个简单的scala程序，在此谢过！！

http://www.ibm.com/developerworks/cn/java/j-lo-funinscala2/

输入数据（data.tsv）：

• 2010-05-04 12:50 10 10 10
• 2010-05-05 13:50 20 20 20
• 2010-05-06 14:50 30 30 30
• 2010-05-05 13:50 20 20 20
• 2010-05-06 14:50 30 30 30
• 2010-05-04 12:50 10 10 10
• 2010-05-04 11:50 10 10 10

简单的实现：

 object Demo {

  def main(args: Array[String]) {
    val input = Source.fromFile("/home/xring/Desktop/data.tsv").getLines().toVector
    val grouped = input.map { line =>
      val parts = line.split("\t")
      (parts.take(2).mkString("\t"), (parts(2).toInt, parts(3).toInt, parts(4).toInt))
    }.groupBy(_._1).map(x => (x._1, x._2.map(_._2)))
    val res = grouped.map(x => (x._1, x._2.reduce((a, b) => (a._1 + b._1, a._2 + b._2, a._3 + b._3))))
      .toVector.sorted
      .map(x => x._1 + "\t" + x._2._1 + "\t" + x._2._2 + "\t" + x._2._3)
    res.foreach(println)
  }

}

输出：

• 2010-05-04 11:50 10 10 10
• 2010-05-04 12:50 20 20 20
• 2010-05-05 13:50 40 40 40
• 2010-05-06 14:50 60 60 60