james

PAT A1028 List Sorting 题目描述： 　　Excel can sort records according to any column. Now you are supposed to imitate this function. 　 　Input Specification: 　　Each input file contains one test case. For each case, the first line contains two integers N (≤10​5​​) and C, where N is the number of records and C is the column that you are supposed to sort the records with. Then N lines follow, each contains a record of a student. A student's record consists of his or her distinct ID (a 6-digit number), name (a string with no more than 8 characters without space), and grade (an integer between 0 and 100,

Look at the following line of java: Mac.getInstance("HmacSHA1"); If I put this in a simple test program, it runs without problems on my server. However, if I use this line in a container, I get java.security.NoSuchAlgorithmException: Algorithm HmacSHA1 not available at javax.crypto.Mac.getInstance(DashoA13*..) The same JDK installation is used in both cases. After googling around a bit, I managed to get it to work by doing two things: Copying sunjce_provider.jar from $JAVA_HOME/jre/lib/ext to the lib directory of the container. Adding the following line to my code: java.security.Security

This time let us consider the situation in the movie "Live and Let Die" in which James Bond, the world's most famous spy, was captured by a group of drug dealers. He was sent to a small piece of land at the center of a lake filled with crocodiles. There he performed the most daring action to escape -- he jumped onto the head of the nearest crocodile! Before the animal realized what was happening, James jumped again onto the next big head... Finally he reached the bank before the last crocodile could bite him (actually the stunt man was caught by the big mouth and barely escaped with his extra

一、初始Series 　　Series 是一个带有 名称 和索引的一维数组，既然是数组，肯定要说到的就是数组中的元素类型，在 Series 中包含的数据类型可以是整数、浮点、字符串、Python对象等。 pandas.Series(data=None, index=None, dtype=None, name=None, copy=False, fastpath=False) 创建第一个Series import pandas as pd user_age = pd.Series(data=[18, 30, 25, 40]) user_age.index = ["Tom", "Bob", "Mary", "James"] #加索引 user_age.index.name = "name" #索引加名字 user_age.name="user_age_info" #series加名字 user_age Out[4]: name Tom 18 Bob 30 Mary 25 James 40 Name: user_age_info, dtype: int64 创建Series的方式 列表方式创建 pd.Series([],index=[])　 字典方式创建 pd.Series({} # 方式一 t = pd.Series([1,2,3,4,43],index=list('asdfg'))

//arrayObject.splice(index,howmany,item1,.....,itemX) 语法 //测试代码let array;array = ['George','John','Thomas','James','Adrew','Martin'];cc.log('array = ' + jsonencode(array));array.splice(1,0,'gmk');cc.log('array = ' + jsonencode(array));array = ['George','John','Thomas','James','Adrew','Martin'];cc.log('array = ' + jsonencode(array));array.splice(1,1);cc.log('array = ' + jsonencode(array));//测试代码log//array = ["George","John","Thomas","James","Adrew","Martin"]//array = ["George","gmk","John","Thomas","James","Adrew","Martin"]//array = ["George","John","Thomas","James","Adrew","Martin"]//array = [

转载自https://blog.csdn.net/lijinlon/article/details/81676859 Python数据分析首先需要进行数据清洗处理，涉及到很多DataFrame和Series相关知识，这里对涉及到的常用方法进行整理，主要设计数据增减、变更索引、数值替换等。其中一些函数的参数并没有介绍齐全，可以通过参考pandas文档或者在编辑器输入方法+?查询(例如df.reindex?)，实践是检验知识水平的最好途径。 import pandas as pd import numpy as np df = pd.DataFrame({'name':['James','Curry','James','Kobe','Wade'], 'age':[31,30,31,35,38], 'score':[18,25,18,17,15], 'block':[5,2,5,3,2]}, index = ['player1','player2','player3','player4','player5']) print(df) age block name score player1 31 5 James 18 player2 30 2 Curry 25 player3 31 5 James 18 player4 35 3 Kobe 17 player5 38 2 Wade 15 1

Excel can sort records according to any column. Now you are supposed to imitate this function. Input Specification: Each input file contains one test case. For each case, the first line contains two integers N (≤10 ​5 ​​ ) and C, where N is the number of records and C is the column that you are supposed to sort the records with. Then N lines follow, each contains a record of a student. A student's record consists of his or her distinct ID (a 6-digit number), name (a string with no more than 8 characters without space), and grade (an integer between 0 and 100, inclusive). Output Specification:

★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★ ➤微信公众号：为敢（WeiGanTechnologies） ➤博客园地址：山青咏芝（ https://www.cnblogs.com/strengthen/ ） ➤GitHub地址： https://github.com/strengthen/LeetCode ➤原文地址： https://www.cnblogs.com/strengthen/p/11333856.html ➤如果链接不是山青咏芝的博客园地址，则可能是爬取作者的文章。 ➤原文已修改更新！强烈建议点击原文地址阅读！支持作者！支持原创！ ★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★ You are given three arrays username , timestamp and website of the same length N where the ith tuple means that the user with name username[i] visited the website website[i] at time timestamp[i] . A 3-sequence is a list of not necessarily different websites of