摘要: val rdd3 = sc.parallelize(List("12","23","345","4567"),2) rdd3.aggregate("")((x,y) => math.max(x.length, y.length).toString, (x,y) => x + y) 两个分区先计算出字 阅读全文
posted @ 2020-05-09 09:09 知晓的老巢 阅读(314) 评论(0) 推荐(0) 编辑