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Python Basics (classes and objects) 1, Two ideas of programming Process oriented and object-oriented Process orientedobject-orienteddifferenceThings are relatively simple and can be solved by linear thinkingThings are complicated and cannot be solved by simple linear thinking Common ground: both object-oriented and process oriented are a way ...

catalogue Review the content of bgp bgp neighbor establishment process Experiment: configure non shortcut DSVPN (BGP routing protocol) Requirements and topology Operation steps 1. Configure addresses and security zones 2. Configure security policy 3. Configure public network dynamic routing to ensure that public network interface rout ...

1, Transaction Basics 1. Transaction definition 2. Four characteristics of transaction Atomicity Transaction is the logical work unit of database. All operations included in transaction are either done or not done at all.Consistency The result of transaction execution must be to change the database from one consistency state to another. ...

2.1 CURD Add method in Dao interface int insert(User user); int deleteById(@Param("id") int id); int update(User user); User selectById(@Param("id") int id); Add SQL in mapping file <insert id="insert" parameterType="user"> insert into user(id,name,pwd) values(#{id},#{name},#{pwd}) </insert> <delete id="deleteById" param ...

Xiaobai anti forgetting Recently, I learned the basic usage of k8s and wanted to practice with an actual springCloud project. As a result, I was directly stopped in the first level registration center. Fortunately, there are official configuration documents, but there are still some holes in the configuration process, so I record it here. Deplo ...

I Data structure overview Data Structure is a subject that studies the organization and management of data. It is often expressed externally as a collection or container of a set of data. Concept explanation: Element: managed atomic data, unlimited element types. Collection: a container for storing elements. It needs to organize elements wi ...

1, Common commands Teaching video of station B: https://www.bilibili.com/video/BV1mW411i7Qf?p=106 tab Automatic completion if you want to switch paths, such as cd Desktop Can enter cd Des tab Key automatic completion Direction keys up and down can automatically the previous command clear Clear screen whoami View current login user 1.1 doc ...

Game 73 biweekly subject 6024. The number that appears most frequently immediately after the key in the array General idea of the topic Give you an integer array nums with subscript starting from 0, and give you an integer key, which has appeared in nums. Count the occurrence times of different integer targets that appear immediately after ...

Starting with Hudi version 0.10.0, we are pleased to launch the support of advanced data layout optimization technology called Z-Order and Hilbert space filling curve in the database field. 1. Background The Amazon EMR team recently published a very good article article Shows how to analyze the data Clustering How to improve query performance? ...

java Basics 4, Process control 4.1. Basic structure Sequential structure The command line is executed sequentially Branch structure (select structure) Different results can be obtained by selecting different execution processes according to conditions category Single branch statement ​ if–else Multi branch statement ...