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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 17597

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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Zotac launches 'Jian Wang 3' competitive masters co-branded customized graphics card, built based on RTX 4070 Ti SUPER Yuebai graphics card

Course Introduction：According to news from this site on April 12, Zotac, as the official partner of the 9th "Jian Wang 3" Competitive Masters, launched a co-branded customized graphics card for "Jian Wang 3" based on GeForce RTX4070 TiSUPERTRINITYOC Yuebai graphics card. The original RTX4070TiSUPERTRINITYOC Moon White graphics card adopts an aerodynamic design with a curved appearance, equipped with multiple Ice Vein 2.0 composite heat pipes, a large area of copper base and Bionic Shield Scale 2.0 fan blades. The front of the customized graphics card adopts the main color of "blue and white", and the main visual poster of the event is printed on the back panel. The top of the graphics card is equipped with a Hongqiao Phantom ARGB faith light, which can be customized with 16 million colors and a variety of lighting effect modes. This Zotac RTX4070TiSUPER

2024-04-12 comment 0 733

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 0 534

Thermaltake launches Steel S250 TG ARGB chassis, front panel compatible with 420 radiator

Course Introduction：According to news from this website on March 28, Thermaltake recently launched the Steel S250TGARGB chassis. The front panel of the chassis is compatible with 420 radiator and comes with 4 ARGB fans pre-installed. The steel-made S250TGARGB chassis is available in black and snow white. The front side panel adopts a mesh design to increase air flow, and the left side is equipped with a glass panel. This website organizes the chassis specifications as follows: In terms of hardware compatibility, Ganglian S250TGARGB supports E-ATX motherboards up to 12x13 inches, CPU radiators up to 165mm, graphics cards up to 400mm, and power supplies up to 220mm. It contains 4 hard drive bays, 2 of which are 2.5 inches, and the other two are optional 3.5/2.5 inches. scattered

2024-03-28 comment 0 825

Lenovo YOGA Book 9i AI Yuanqi dual-screen flipbook first sale: Ultra 7 processor + 2.8K OLED touch screen, 17,999 yuan

Course Introduction：According to news from this website on June 8, Lenovo YOGABook9iAI Yuanqi dual-screen flipbook went on sale for the first time today. It is equipped with a Core Ultra7 processor and 2.8 KOLED dual screens, priced at 17,999 yuan. According to reports, this new product uses CNC technology and high-quality aviation aluminum to form one piece. It is available in foggy blue color and supports 360° rotation. The dual 13.3-inch combination creates an 18-inch portable OLED large screen with a resolution of 2880x1800, a brightness of 400 nits, covering 100% DCI-P3 color gamut, and supports stylus input. In terms of hardware, the new product is equipped with a Core Ultra7155U processor with built-in NPU, onboard 32GB LPDDR5x memory, and a pre-installed 1TB PCIe4.0 solid-state drive. also,

2024-06-09 comment 0 1003

VGN A75 gaming magnetic keyboard is on sale for the first time today: single-mode wired connection, 0.1~4.0mm adjustable travel, starting from 189 yuan

Course Introduction：According to news from this site on June 18, the VGNA75 gaming magnetic keyboard is on sale today. The keyboard adopts GAS structure, supports web drive/independent drive, and is available in five colors. The initial price starts at 189 yuan. According to reports, the VGNA75 gaming magnetic axis keyboard adopts a 75 configuration and is available in five colors: classic white, classic black, rose red gradient, blue gradient and gray gradient, and supports single-mode wired connections. The selling price information is as follows: Classic White 189 Yuan Classic Black 189 Yuan Rose Red Gradient Side Engraving 249 Yuan Blue Gradient Side Engraving 249 Yuan Gray Gradient Side Engraving 249 Yuan This keyboard is equipped with a metal knob that supports volume adjustment and is suitable for office and gaming scenarios. Use; adopts GAS structure, equipped with silencer filling, PC/steel positioning plate, which can reduce resonance and take into account the precision of magnetic axis buttons.

2024-06-19 comment 0 1290

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