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Self-study IT network Linux load balancing video tutorial

Course Intermediate 11245

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 17581

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 11291

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 coin is Polkadot? Is Polkadot valuable?

Course Introduction：Polkadot: Polkadot (DOT), a multi-chain protocol connecting the blockchain world, is the main digital asset in the Polkadot network and has been issued since August 2020. Polkadot Network is a heterogeneous multi-chain protocol designed to connect various blockchains with the purpose of promoting interoperability between different blockchain systems, thereby promoting the development of the entire blockchain industry. The main uses of Polkadot include: Governance: DOT holders can participate in the governance of the Polkadot network and vote on network parameters and proposals. Staking: DOT holders can pledge DOT to verification nodes to ensure the security and stability of the network. Staking DOT can earn rewards. Payment fees: DOT can be used to pay transaction fees on the Polkadot network. The price of Polkadot is largely affected by the Polkadot network

2024-02-27 comment 0 846

What is Polkadot? Recommended Polkadot trading platform

Course Introduction：Polkadot (DOT) is the native token of the Polkadot network and has been listed on exchanges such as Binance, Huobi, OKEx, Coinbase, Kraken and Gemini. It is recommended to use Binance, Huobi, OKEx, Coinbase, Kraken and Gemini for Polkadot transactions due to their reliability and security.

2024-08-30 comment 0 1046

What is Polkadot? How does Polkadot work?

Course Introduction：Polkadot: The future of cross-chain interoperability Polkadot (DOT) is a cryptocurrency designed to enable connectivity and cross-chain interoperability between multiple blockchains. This token was initiated and supported by Parity Technologies as the primary digital asset of the Polkadot network. The working principle of Polkadot is based on the concept of relay chain. The relay chain is a core chain that achieves its functionality by connecting to multiple independent parachains. These parachains can host a variety of different applications and protocols and have their own governance and consensus mechanisms. Polkadot plays several key roles in the Polkadot network: Governance: DOT holders can influence network decisions by participating in governance voting. Staking: DOT can be staked to secure the network and earn rewards. transaction fee

2024-03-15 comment 0 496

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