scalashaibaa_oneliner

    val asd = all.map(x => (x._1, (x._2._1._3, x._2._2)))
                                    //line  //age    //set                  //set
    val moviesAvgByAge = asd.map(x => (x._2._1, x._2._2)).flatMap(x => x._2.map(y => ((x._1, y._1), y._2))).groupByKey
    .mapValues(x => (x.reduce(_ + _).toFloat / x.size))//.top(10)(Ordering[(Float, String)].on(x => (x._2, x._1._2))