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Self-study IT network Linux load balancing video tutorial

Course Intermediate 11245

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 17581

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 11291

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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How to use PHP to implement IoT communication based on MQTT protocol

Course Introduction：How to use PHP to implement IoT communication based on MQTT protocol Introduction: Internet of Things (IoT) refers to connecting to the Internet through various information sensing devices (sensors, controllers, intelligent hardware, etc.) to achieve mutual communication and communication between devices Interoperability. MQTT (MessageQueuingTelemetryTransport) is a lightweight and reliable communication protocol that is widely used in the field of Internet of Things for communication between devices.

2023-07-28 comment 0 2143

How to build high-performance IoT applications using Vue.js and Rust

Course Introduction：How to use Vue.js and Rust language to build high-performance Internet of Things applications. The Internet of Things (IoT for short) is a rapidly developing field in recent years. It involves various connected devices and sensors and requires high-performance applications to handle massive amounts of data. data and real-time communication. When building IoT applications, Vue.js and Rust languages are two very promising choices. Vue.js provides powerful front-end support, while Rust language provides high performance and security. Book

2023-07-31 comment 0 1756

How to use Java to develop the electrocardiogram detection function of IoT hardware

Course Introduction：How to use Java to develop the electrocardiogram detection function of IoT hardware. The Internet of Things (IoT) is the concept of connecting all things to the Internet. In the Internet of Things, hardware devices communicate and interact with other devices and systems over the Internet. Electrocardiogram (ECG) is a technology that detects electrocardiogram signals and is used to evaluate heart function and monitor heart disease. This article will introduce how to use Java to develop the electrocardiogram detection function of IoT hardware.

2023-09-19 comment 0 1675

Master IoT and sensor applications in JavaScript

Course Introduction：Mastering IoT and sensor applications in JavaScript requires specific code examples. The Internet of Things (IoT) has become one of the hottest topics in today's technology field. It combines technologies such as sensors, devices, networks, and cloud computing to realize interconnection and communication between devices. As a widely used programming language, JavaScript also plays an important role in the field of Internet of Things. In this article, we will explore how to use JavaScr

2023-11-04 comment 0 1356

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