scala mapPartitionsWithIndex函数的使用
摘要:var rdd1=sc.makeRDD(Array((1,"A"),(2,"B"),(3,"C"),(4,"D")),2) rdd1.partitions.size res20:int=2 rdd1.mapPartitionsWithIndex{ (partIdx,iter)=>{ var part
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posted @ 2018-04-26 19:11
posted @ 2018-04-26 19:11
posted @ 2016-10-29 11:42