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《take me home country roads》中文大意take me home country roads --john denver 乡村小路带我回家 约翰-丹佛 almost heaven west virginia 天堂似的西弗吉尼亚 blue ridge mountains shenandoah river 蓝色的小桥 shenandoah河 life is old ...

在spark中,对所有数据的操作不外乎是创建RDD、转化已有的RDD以及调用RDD操作进行...take(num) 从RDD中返回num个元素 rdd.take(2) {1,2} top(num) 从RDD中...

例1):对每个的的年龄加2 1 2 3 4 5 6 7 8 9 10 object MapValues { def main(args: Array[String]) { val conf = new SparkConf().setMaster("local").setAppName("map") val sc = new SparkContext(conf) val list = List(("mobin",22),("kpop...

brought Yesterday was Saturday. Mr King brough his family to the People's Park.

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