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Self-study IT network Linux load balancing video tutorial

Course Intermediate 11250

Course Introduction："Self-study IT Network Linux Load Balancing Video Tutorial" mainly implements Linux load balancing by performing script operations on web, lvs and Linux under nagin.

Shangxuetang MySQL video tutorial

Course Advanced 17583

Course Introduction："Shangxuetang MySQL Video Tutorial" introduces you to the process from installing to using the MySQL database, and introduces the specific operations of each link in detail.

Band of Brothers front-end example display video tutorial

Course Advanced 11299

Course Introduction："Brothers Band Front-end Example Display Video Tutorial" introduces examples of HTML5 and CSS3 technologies to everyone, so that everyone can become more proficient in using HTML5 and CSS3.

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Ways to fix issue 2003 (HY000): Unable to connect to MySQL server 'db_mysql:3306' (111)

I recently tried to containerize my FastAPIPython server (also for replication/doubling purposes). Before, I had just a MySQL server in a Docker container and everything was fine, but when I also made my web server a service, it couldn't connect to the MySQL server, so now the application doesn't work. Below is the code snippet of the server database initialization connector in the application fromfastapiimportFastAPIimportmysql.connectorapp

2023-09-05 11:18:47

Experiment with sorting after query limit

So this is my first question here, please forgive me if something is wrong. I'm trying to make a sort query based on constraints. So there is a Customers table with 90 records. I want to first perform a query limited to 3 records, and then sort the results of this query by a column called ContactName. I think this might be a nested query. Nested queries run fine in SQLServer, but don't know how to implement it in MySQL. Limit query: Select*fromcustomerslimit

2023-09-05 14:46:42

CSS Grid: Create new row when child content overflows column width

I have a two column layout based on CSS grid. When the content of the second column exceeds 1fr I want to create a new row. As it currently stands, the content simply overflows the column. One requirement of this layout is that the items in the right menu column are in one row. I achieve this with: .right-menu{...grid-auto-flow:columndense;...} If I remove the grid-auto-flow attribute, the overflow stops. However, the items are now stacked into multiple rows, which is not what I want. I also tried converting .ri

2023-09-05 15:18:28

PHP full text search functionality using AND, OR and NOT operators

Newbie question: I'm trying to implement a full text search on a search string using php and eloquent. $searchstring="+(victimsuspect)+crime-covid";$searchresult=RssItem::whereRaw("MATCH(description)AGAINST('$searchstring'INBOOLEANMODE)")->ge

2023-09-05 15:06:32

Shortest way to convert all PHP types to string

I'm writing a general system that I hope can one day be applied to fields like medicine (i.e. it's "scientific"). I think the best way is to represent all the data in php with strings (true will be "true", false will be "false" and so on). The reason for this is that in php any value has a unique string representation (such as the php code itself). I post this question to speed up the design process of this program. Some values are easily converted to strings: numbers, booleans, etc. Some are not easy: objects, arrays, resources. I think the transfer object and

2023-09-05 15:34:44

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Java Reactor Reactor Pattern

Course Introduction：This article mainly introduces the detailed explanation of how to use the Java Reactor reactor mode. The article introduces it in great detail through sample code. It has certain reference learning value for everyone's study or work. Friends who need it can refer to it.

2020-06-24 comment 0 2058

Java NIO Reactor Pattern

Course Introduction：Simple model of Java NIO reactor mode. Generally, the reactor mode in NIO is like this: one Acceptor (of course, multiple ones are fine, but one is enough in general scenarios) is responsible for the accept event, and registers the received Socket CHannel to the Reactor pool according to a certain algorithm. On the removed Reactor, the registered events are reading, writing, etc. After that, all IO events of this Socket Channel have nothing to do with the Acceptor, and are all handled by the registered Reactor. ..."

2016-12-19 comment 0 1688

Python server programming: Detailed explanation of semi-synchronous and semi-asynchronous Reactor model

Course Introduction：Python, as a high-level language, is widely used in various scenarios. Among them, server programming is one of the important applications of Python, which involves many technologies and models. This article will focus on the semi-synchronous and semi-asynchronous Reactor model in Python server programming. 1. What is the semi-synchronous and semi-asynchronous Reactor model? Before explaining the semi-synchronous and semi-asynchronous Reactor model, let's first understand the Reactor model. Reactor is an event-driven model, and its basic idea is

2023-06-18 comment 0 1523

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