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Self-study IT network Linux load balancing video tutorial

Course Intermediate 11273

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 17598

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 11309

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 Jingdong e-card How to use e-card

Course Introduction：Jingdong E Card is a prepaid shopping card issued by Jingdong Mall. It can be used in Jingdong’s self-operated malls and can be used to directly deduct cash when purchasing goods. As a convenient and fast way to shop. How to use JD e-Card 1. First, select the product in JD Mall and enter the [Fill Order] page. Find and click the icon behind [Gift Card (JD Card/E Card)]; 2. After clicking, [Gift Card] will pop up. ] interface, click [Bind New Card]; 3. Then enter the gift card password, which is the password of the JD E Card, and click [Bind and Use]; 4. The binding is successful, click [OK]; 5. At this time Jingdong E Card and face value will be displayed, check Jingdong E Card; 6. At this time, you will return to the [Fill Order] page, showing that 1 gift card has been selected, and the deduction

2024-06-10 comment 0 1187

Where can I check the balance on Jingdong e-card? How to check the balance?

Course Introduction：Jingdong e-card can purchase customized items in Jingdong mall, but most friends don't know where to check the balance of Jingdong e-card. Let's follow us to see how to operate. Where to check the balance of Jingdong e-card 1. First open the Jingdong APP and click [My] in the lower right corner of the home page; 2. Then enter the My area and click the [My Wallet] function as shown below; 3. Then On the My Wallet page, find the [Gift Card] service option on the page; 4. Finally enter the balance page as shown below, and you can view the remaining balance of the JD e-Card.

2024-06-06 comment 0 813

Where to bind Jingdong Mall APP gift card?

Course Introduction：How to bind JD.com gift cards? Many friends have JD gift cards, which can be used directly to purchase goods in JD self-operated stores. Users can make purchases after binding the gift cards. Below, I will bring you a JD gift card binding tutorial. I hope it will be helpful to everyone. . 1. Open the Jingdong Mall APP and go to the home page; 2. Click the [My] option below to go to the personal center page; 3. Find the [My Wallet] function, the location is shown in the picture below, click to enter; 4. In the wallet On the page, we can see the [Gift Card] function, click it; 5. Then click [Bind New Card] at the bottom right of the gift card page; 6. Finally, enter the gift card password and confirm the binding.

2024-03-19 comment 0 502

How to perform real-name authentication on Jingdong Mall APP

Course Introduction：How to get real-name authentication on Jingdong Mall APP? Jingdong Mall is an online shopping platform that many friends often use. Before shopping, it is best for everyone to conduct real-name authentication so that they can enjoy complete services and get a better shopping experience. The following is the real-name authentication method for JD.com, I hope it will be helpful to netizens. 1. Install and open JD.com, and then log in to your personal account; 2. Then click [My] at the bottom of the page to enter the personal center page; 3. Then click the small [Settings] icon in the upper right corner to go to the setting function interface; 4. Select [Account and Security] to go to the account settings page; 5. Finally, click the [Real-name Authentication] option to fill in the real-name information; 6. The installation system requires you to fill in your real personal information and complete the real-name authentication

2024-03-19 comment 0 782

How to cancel Jingdong Mall service on Jingdong_Tutorial on canceling Jingdong Mall service on Jingdong

Course Introduction：1. First enter JD.com, click on the settings icon and click to enter. 2. Then enter the account settings and click Account and Security to enter. 3. Then enter Account and Security, click Logout JD Mall Service to enter. 4. Finally, enter the account cancellation and click Apply for cancellation.

2024-06-05 comment 0 395

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