朱智文的专栏

涉及到的类:WordcountDriver.java,  WordcountMapper.java WordcountReducer.java wordcount.txt文件内容： hello my name is zhuzhiwen what is your name hello my name is yy hello my name is kuaishou hello my name i

业务:输出相同订单编号中最大金额的记录 订单编号                       金额 Order_0000001,Pdt_01,222.8 Order_0000001,Pdt_05,25.8 Order_0000002,Pdt_05,325.8 Order_0000002,Pdt_03,522.8 Order_0000002,Pdt_04,122.4 Order_000

pip install matplotlib -i http://pypi.douban.com/simple --trusted-host pypi.douban.com pip install numpy -i http://pypi.douban.com/simple --trusted-host pypi.douban.com pip install pandas -i http://p...