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1. Composition of class Class class name{ Public: / / public member Function 1; Variable 1     ......       Private: / / private member Function 2; Variable 2     ......      };   #include <iostream> using namespace std; class score{     public:     inline void setscore(int m,int f);     inline void showscore();      ...

1. Three clients of ES a.Transport Client, transport based connection, using port 9300 of es b.JestClient, http based connection, using port 9200 of es 3.RestClient, http based connection, official recommendation of es, 9200 port 2. Document source: es aggregation based on jestClient: https://blog.csdn.net/lvyuan1234/artic ...

Preface Founded in 2000, Wuhan Dameng database Co., Ltd. is a basic software enterprise under China Electronic Information Industry Group (CEC). It specializes in the research and development, sales and service of database management system, and provides users with services such as big data platform architecture consultation, data technology pl ...

I. reasons for using custom QueryParser For some query parsers (fuzzy query, wild card query) the performance will be reduced when querying, so consider canceling these queries. In the specific query, there is probably a requirement: the obtained query range is a number, so the original QueryParser must be expanded to carry ...

I. demand Set scoring rules according to the file name, or double the score of the latest year according to the modification time of the document, reduce the score beyond one year, etc. II. Specific implementation Here, the scoring rule is modified according to the file name. The scores containing "JRE" and "S ...

I. build lvs cluster of DR mode Environment: DS: 192.168.4.53 VIP: 192.168.4.100 RS: 192.168.4.51 192.168.4.52 1. Establish three experimental machines and configure ip and yum warehouses 2. Configure VIP on DR [root@53 ~]#cp /etc/sysconfig/network-scripts/ifcfg-eth0 {,:0} [root@53 ~]#vim /etc/sysconfig/network-scripts/ifcfg-e ...

I. Basic Concepts (composition) matplotlib consists of three layers: scripting, artist and backend In the whole matplotlib, all the elements that can be seen in the graph belong to Artist object, that is, all the elements composed of title, axis label, scale, etc. are instances of Artist object (1) if Artist is compared to dr ...

Using docker configuration to install hadoop and spark Install hadoop and spark images respectively Install hadoop image docker selected Mirror Address , the version of hadoop provided by this image is relatively new, and jdk8 is installed, which can support the installation of the latest version of spark. docker pull uhopp ...

What we bring today is to crawl the comic information and links on the comic website This time, we will use bs4, which is Beautiful Soup Let's introduce * * Beautiful Soup * *:Beautiful Soup is a Python library that can extract data from HTML or XML files. It can realize the usual way of document navigation, search and modificat ...

Requirement: read out the data in hive and write it into es. Environment: spark 2.0.2 1. enableHiveSupport() is set in sparksession SparkConf conf = new SparkConf().setAppName("appName").setMaster("local[*]"); SparkSession spark = SparkSession .builder() .appName("Java Spark SQL basic exam ...