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Self-study IT network Linux load balancing video tutorial

Course Intermediate 11311

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 17622

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 11329

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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Does iPhone 12 have 64g?

Course Introduction：The iPhone 12 is available in 64g, 128GB and 256GB versions; the iPhone 12 is a mobile phone product released by Apple. The phone design uses ion glass and a 7000 series aluminum metal casing, and adopts a straight-to-bezel design. The back color is black, White, red, green, blue and purple.

2022-12-13 comment 0 12147

Blue OLED phosphorescent materials have poor color accuracy, and related terminal display products are expected to be shipped as early as 2026

Course Introduction：According to a report by Korean media TheElec, OLED materials giant UDC’s blue OLED phosphorescent materials are facing problems with poor color accuracy, which may affect the further delay in the launch of terminal display products. According to previous reports on this site, in addition to UDC, Samsung Display itself is also developing blue OLED phosphorescent materials. In OLED panels, phosphorescent materials can theoretically achieve nearly 100% exciton energy conversion rate, while fluorescent materials can only achieve 25%. The use of phosphorescent materials can greatly improve OLED energy efficiency, thereby reducing power consumption, extending battery life, and increasing brightness. ▲Picture source UDC official website Current OLED products already use phosphorescence in the other two primary colors-red and green. But in the blue part, the phosphorescent material exists

2024-04-15 comment 0 551

JD.com releases consumer trends for July 2023: smart products are popular, and black, white, and red have become popular colors

Course Introduction：Jingdong Consumer and Industrial Development Research Institute released the news of "Hot Consumption Words in July 2023". The report organizes the description keywords of the top ten products in each category, and summarizes the most frequently occurring product attribute keywords. This site found that products with "smart" attributes are the most popular, not just large home appliances. and digital accessories, including small products such as smart night lights, smart skipping ropes, and smart trash cans. Consumers are also very fond of them. From the appearance of the products, black, white, and red are the best-selling popular colors. Many products have color combinations or mixed color designs. Color is the fourth most frequent word in the color field, followed by green, blue, and gray. The monthly word frequency of words such as lowering blood pressure, high blood sugar, and antihypertensive drugs increased by more than 10 times year-on-year.

2023-09-06 comment 0 1459

Creating a Dynamic Navigation Script for Active State and Expandable Menus

Course Introduction：When building a dynamic web application, the user interface (UI) needs to offer an intuitive navigation experience. Whether it’s an e-commerce site with multiple product categories or a content-heavy admin dashboard, having active states and expandab

2024-11-08 comment 0 328

Farewell to the Nokia brand, HMD official website updates to announce new mobile phone visual effects

Course Introduction：IT House reported on February 2 that HMD Global no longer produces "Nokia" brand mobile phones. Today it updated its official website and shared the design language of its own brand in the future. Although the images shared on the official website are only illustrative, they still reveal the product design of the company's future mobile phones. Although it cannot be confirmed whether HMD brand products will use such bright colors, the blue, green and pink renderings do look very bright. pretty. Note from IT House: In the promotional images exposed this time, a mobile phone adopts a dual-camera design with rounded corners and edges. Another image shows a triple-camera device with a main camera and two secondary cameras, with a USB-C port and a 3.5mm audio jack on the bottom. fenyefenye

2024-08-21 comment 0 841

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