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Self-study IT network Linux load balancing video tutorial

Course Intermediate 11388

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 17701

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 11397

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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What kind of battery is black gold battery?

Course Introduction：Black gold battery refers to the black gold high-energy battery launched by Chaowei Group. This kind of battery uses graphene in the battery grid. Since then, the black gold battery has undergone three generations of product upgrades, optimizing and upgrading six indicators including the grid structure, curing process, and electrolyte-acid ratio.

2020-10-19 comment 0 29435

Realme GT6 battery exposed, first concentrated energy battery

Course Introduction：Recently, the latest official news of the Realme GT6 has been leaked frequently. After the screen parameters of the Realme GT6 were announced on July 3, the battery status of the Realme GT6 was once again officially announced. A good battery often plays a vital role in a mobile phone. , it is reported that the Realme GT6 will debut a concentrated battery, which is a battery using new energy technology, which is very exciting. The latest official news of Realme GT6: "Realme × Ningde New Energy, Realme GT6 debuts [energy-concentrated battery]!" Realme GT6 battery capacity is: 5800mAh. So is the 5800 mAh battery of Realme GT6 durable? The answer is of course yes. It is reported that this battery uses a new generation of silicon-carbon anode battery technology, with a silicon content of up to 6%.

2024-07-10 comment 0 1144

Dual battery notebook

Course Introduction：What is the difference between ThinkPad T470 dual battery and single battery? 1. Different appearance: the dual battery base is flat, while the single battery base is protruding. For dual batteries, one is built-in and the other is external. When carrying it out, if it feels heavy, just use the external one. Unplug the battery. 2. The difference between dual battery cells and single battery cells: The capacity of dual battery cells is larger than that of single battery cells, which is twice that of single battery cells. A single-cell battery has only one battery, while a dual-cell battery consists of two batteries connected in series or parallel. The capacity of the mobile power supply is supplied by the internal power storage unit, which is the cell, that is, the battery. 3. ThinkPad is still focused on commercial use. It can be seen from the dual battery and dual hard drive technology of T470 that ThinkPad is still focused on commercial use. 4. In summary, the difference between dual-liquid primary batteries and single-liquid primary batteries

2024-03-06 comment 0 960

dell laptop battery

Course Introduction：How to solve the problem that the battery cannot be recognized when the Dell laptop is turned on? 1. The battery of the laptop is loose. Solution: Reinstall the battery, making sure it is installed tightly. The incoming contacts of the computer battery are dirty. Solution: Remove the battery, wipe the battery contacts (metal pieces) with alcohol cotton, wait for them to dry before installing them back into the computer. The battery driver of the computer system is not recognized. 2. Solution 3: If the problem is that the battery itself is not conductive, it can only be returned to the factory for repair. After all, battery problems are difficult for us to solve. You can also find relevant official after-sales service for processing. 3. When the power automatically shuts down after unplugging the power supply and the battery fails to provide power, it is usually caused by battery failure. It is first recommended to re-plug the battery (if it is a built-in battery, you can use a pin to prick it.

2024-03-22 comment 0 1336

OnePlus Glacier Battery is Coming: Detonating a Smartphone Battery Life Revolution

Course Introduction：According to news on June 20, this afternoon, OnePlus will hold a OnePlus Glacier battery technical communication meeting to officially announce the technical details of the Glacier battery. Before the communication meeting began, OnePlus Li Jie released a PPT indicating that Glacier Battery will lead the "smartphone battery life revolution." Li Jie said that Glacier Battery is a high-performance battery specially designed for high-performance mobile phones. It also achieves high energy density, large capacity and fast charging. This is a "new battery species" that has never appeared in the industry. It is reported that the OnePlus Glacier battery is jointly built by OnePlus and Ningde New Energy. This battery has a capacity of 6100mAh and a thickness of less than 6mm, which is thinner than an ordinary 5000mAh battery. Moreover, this battery supports 100W wired flash

2024-06-20 comment 0 1062

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