maxmax（key=None）Find the maximum item in this RDD.Parameters:key– A function used to generate key for comparing例子：meanmean()Compute the mean of this R... Read More
首先在$SPARK_HOME主目录下建立一个test文件夹，里面放一些文件（注意文件全部内容都可被hadoop用户访问，否则运行会出现permission denied的错误）打开pyspark: ./bin/pyspark读入文件整行切割（flatMap, s.split()）映射数量（map, ... Read More
题目来源https://leetcode.com/problems/permutations-ii/Given a collection of numbers that might contain duplicates, return all possible unique permutations... Read More
题目来源https://leetcode.com/problems/permutation-sequence/The set[1,2,3,…,n]contains a total ofn! unique permutations.By listing and labeling all of the ... Read More
题目来源https://leetcode.com/problems/permutations/Given a collection ofdistinctnumbers, return all possible permutations.For example,[1,2,3]have the foll... Read More