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Tag: operation

Does the LuA pathological model have an index running time?

As we all know, regular expressions implemented in a recursive manner (rather than NFA/DFA) may require exponential running time in some cases. Lua patterns are implemented through recursive matche

October 5, 2021By Simo Lua Has, index, lua, mode, operation, pathology, time, Whether it isLeave a Comment

Is ‘Is Distinct from’ Is a real mysql operator?

In a book, I saw this syntax:

SELECT * FROM inw WHERE id IS DISTINCT FROM 4; But I received an error:

ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that cor

October 4, 2021By Simo Mysql Distinct, inquiry, mysql, one, operation, trueLeave a Comment

Mysql library, table, record, related operations (1)

Library, table, record, related operations (1) Database configuration # The purpose of unified configuration through the configuration file: unified management of the server (mysqld) and client (cl

October 4, 2021By Simo Mysql Library, mysql, operation, Record, Related, tableLeave a Comment

[Mysql] mysql basic operation

Basic operation of MySQL Basic operation of data: CRUD (Create, Retrieve, Update, Delete Classified according to the object of operation, basic SQL operations can be divided into:
library operati

October 4, 2021By Simo Mysql Basic, mysql, operationLeave a Comment

Use PyCharm to operate MySQL database

Install PyMySql template

pip install pymysql

Configure MySQL connection parameters

pymysql.Connect()

host , Post, user, passwd, db, charset

Get cursor() object

c

October 4, 2021By Simo Mysql database, mysql, operation, Pycharm, UsingLeave a Comment

Mysql common operation

mysql backup:

docker exec container ID mysqldump -uroot -p password–databases library name> library name.sql –Create user:
create user ‘username’@’%’ IDENTIFIED BY ‘password’;
–Create

October 4, 2021By Simo Mysql common, mysql, operationLeave a Comment

C # serial port operation

1

SerialPort _Serial = new SerialPort
{
PortName = “COM1”,
BaudRate = 9600,
DataBits = 8,
Parity = Parity.None,
StopBits = StopBits.One,
WriteTimeout = SerialPort.InfiniteTimeout,
Rea

October 4, 2021By Simo C# C #, operation, serial portLeave a Comment

C # – Run the scan application on a 64-bit computer via ClickOnce

Okay, here are my settings.

I have a c#app that works on all 32-bit Windows XP-Vista-7 machines Normal operation. I already have a verisign PFX to support ClickOnce deployment and use Atalaso

October 4, 2021By Simo C# application, bit, C #, Calculation, Clickonce, Machine, operation, pass, program, ScanLeave a Comment

Do you use AKKA Cluster to run separate Actor systems on each host in a distributed system?

This is my assumption based on Stackoverflow reading.

You have multiple system components:

>Database
>Authentication
>Network

As described in the microservice model, each system

October 3, 2021By Simo System Architecture actor, AKKA, cluster, distributed, host, middle, operation, Separate, system, table, use, whetherLeave a Comment

FLUTTER Tooltip Lightweight Operation Tips

Tooltip is a Widget inherited from StatefulWidget. It does not need to call up methods. When the user long presses Tooltip When the Widget is wrapped, the corresponding operation prompt will automa

October 3, 2021By Simo Software Design flutter, lightweight, operation, prompt, TooltipLeave a Comment

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