Python takes you to re create short videos
Welcome to pay attention
Python wechat ordering applet course video
https://edu.csdn.net/course/detail/36074
Python practical quantitative transaction financial management system
https://edu.csdn.net/course/detail/35475
1. Target scenario
Tiktok or Kwai Fu, and so on, once a video is on fire, many UP owners will scramble to imitate or sho ...
Posted by falian on Mon, 22 Nov 2021 04:30:55 -0800
Basic management index
Reference: https://eco.dameng.com
Guidelines for managing indexes
Index: provides a faster path to access table data
DM8 common types
typedescribeClustered indexEach ordinary table has and has only one clustered indexunique indexThe index data is unique according to the index keyFunctional indexContains the precomputed value of the ...
Posted by chrislead on Mon, 22 Nov 2021 00:12:53 -0800
interrupted() and isInterrupted() are still half understood?
preface
When it comes to how to terminate a thread, the method that some readers usually think of immediately must be stop(), but the stop() method is not recommended (it is prohibited in many specifications). The reason is that forcibly terminating a thread will lead to abnormal termination of the program, incorrect release of resources, ...
Posted by Patrick on Sun, 21 Nov 2021 13:41:24 -0800
MySQL union constraint. The primary key is imported into mysql
Java cultivation program -- the 73rd day of learning punch in
Java (72nd day of punch in)
I've been busy with digital experiment recently. If you have any questions about verilog, please exchange and learn
First, simply query the previous content. Query the top 200 cities in the city table. After grouping according to the Countr ...
Posted by shergold on Sun, 21 Nov 2021 11:33:32 -0800
[Golang] - use time.Ticker to do scheduled tasks
1, Foreword
golang's time.Ticker is generally used to execute tasks as a time cycle.
2, demo
This is an example posted on the official website. Its function is to output the current time every 10s.
package main
import (
"fmt"
"time"
)
func main() {
ticker := time.NewTicker(time.Second)
defer ...
Posted by dminadeo on Sat, 20 Nov 2021 22:28:32 -0800
Data science pandas
catalogue
Import
Why learn pandas
What is pandas
Basic operation of pandas
Common data types of pandas
Creation of pandas Series
Series Slicing and indexing of pandas
Reading external data from pandas
DataFrame of pandas
Row or column of pandas
loc of pandas
iloc of pandas
Boolean index of pandas
String method of pandas
da ...
Posted by Digwood on Sat, 20 Nov 2021 17:18:12 -0800
MyBatis - loading mechanism for global configuration files
For code debugging, we can use any test code in the previous chapter as the Debug carrier. In this chapter, we actually study these two codes:
InputStream xml = Resources.getResourceAsStream("mybatis-config.xml");
SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(xml);
That is, how to load the MyBatis global ...
Posted by BETA on Sat, 20 Nov 2021 15:46:12 -0800
MYSQL operation statement
1, Basic command line operations
mysql -u username - p password ;--- Connect to database
flush privileges ; Refresh permissions
show databases ; --- View all databases
mysql > use Database name--- Switch database
mysql> show tables ;--- Displays information for all tables in the database
MySQL > ...
Posted by jkohns on Sat, 20 Nov 2021 13:49:56 -0800
Mybatis - the first mybatis program
MyBatis
If there is a problem, switch the version:
jdk:1.8mysql:5.1.47maven 3.6.1IDEA
brief introduction
What is MyBatis
MyBatis is an excellent persistence layer framework, which supports custom SQL, stored procedures and advanced mapping. MyBatis eliminates almost all JDBC code and the work of setting parameters and obtaining result ...
Posted by watts on Sat, 20 Nov 2021 13:06:01 -0800
Principle and workflow analysis of rsync algorithm
This paper analyzes the principle of rsync algorithm and the workflow of rsync through examples, which is the explanation of rsync's official technical report and official recommended articles. This article will not describe how to use the rsync command, but explain in detail how it can achieve efficient incremental transmission. The following ...
Posted by sean04 on Sat, 20 Nov 2021 11:14:26 -0800