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Self-study IT network Linux load balancing video tutorial

Course Intermediate 11382

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 17695

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 11394

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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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 0 565

Xiaomi Redmi Pad Pro tablet features Snapdragon 7s Gen2 processor, 12.1-inch 2.5K 120Hz LCD

Course Introduction：According to news from this site on April 9, blogger @digitalchat.com today exposed the parameter information of Xiaomi RedmiPad Pro tablet and disclosed the SoC and screen information of the tablet. This website organizes the tablet parameter information as follows: Screen: 12.1-inch 2.5K+120Hz LCD, brightness 600 nits SoC: Snapdragon 7sGen2 Battery: 10,000 mAh, supports 33W fast charging and reverse charging functions. In addition, the tablet is available in three models The colors are light blue, smoky green and dark gray. The poster shows that the product uses a double ring lens module. It also comes with an exclusive key pen. Related reading: "Xiaomi RedmiPad Pro tablet warm-up: 10000mAh battery capacity, supports reverse charging"

2024-04-09 comment 0 1205

KTC launches 23.8-inch monitor H24F8: 1080p 180Hz FastIPS screen, starting price 499 yuan

Course Introduction：According to news from this website on May 13, KTC launched a new monitor product today - H24F8, which supports native 180Hz refresh rate and hardware low blue light, with a resolution of 1920*1080. The pre-order price is 699 yuan, and the initial purchase price is 499 yuan. This site summarizes the general information about this monitor as follows: This monitor uses an A-grade Fast IPS panel, supports 1ms response time, has a brightness of 400nit, and has 16.7 million colors. It supports 99% sRGB color gamut coverage, 97% DCI-P3 color gamut coverage, and has dynamic OD technology, which can automatically synchronize the monitor’s frame rate with the game’s real-time frame rate to reduce overshoot. This monitor uses DC dimming to reduce screen flicker, claims to "filter" harmful blue light from the source, and supports dark balance:

2024-06-05 comment 0 712

ASUS launches XG32WCMS curved gaming monitor with QHD resolution and 280Hz refresh rate

Course Introduction：According to news from this site on May 9, ASUS recently launched the ROG StrixXG32WCMS gaming monitor, which is equipped with a 31.5-inch 2560×1440 resolution 1500R curvature FastVA panel with a 280Hz refresh rate. This site organizes other parameters of the ROGStrixXG32WCMS display as follows: The display supports 8-bit color depth, typical brightness value of 350nits, and typical contrast value of 4000:1; in HDR mode, the peak brightness of the XG32WCMS can reach 400nits, and the maximum contrast ratio is 100000000:1. ROGStrixXG32WCMS features a glare-free design on the panel, is TÜV flicker-free and low blue light certified, and has

2024-05-09 comment 0 910

ViewSonic 27-inch 2K 185Hz monitor VX2779-2K-PRO-W is on sale for 1,099 yuan

Course Introduction：According to news from this website on July 1, ViewSonic’s new gaming monitor VX2779-2K-PRO-W is now on sale. The monitor has a resolution of 2560×1440 and an initial price of 1,099 yuan. The monitor uses a Fast IPS panel with a resolution of 2560×1440; supports 185Hz refresh rate, 1msGTG response; supports HDR, DC dimming, hardware low blue light and no flicker screen. In addition, VX2779-2K-PRO-W has 100% SRGB and 95% DCI-P3 wide color gamut, supports multiple color gamut color modes, and is compatible with Freesync and G-sync. In terms of interfaces, this monitor provides two HDMI2.0, 1 DP1.4, 3.

2024-07-02 comment 0 721

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