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Self-study IT network Linux load balancing video tutorial

Course Intermediate 11241

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 17578

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 11289

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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Island problem in Java

Course Introduction：Afteranobjecthasbeenused,itisdeallocatedfromthememoryusingtheGarbageCollectorclass.Theobjectsaredestroyedbasedonthefactthatnoreferencetothatobjectispresent.TheGarbageCollectorclasscallsthe‘finalize’functionontheobjectthatneedstobe

2023-08-19 comment 0 1230

An in-depth analysis of the garbage collector management principles of Go language

Course Introduction：An in-depth analysis of the garbage collector management principle of the Go language. Garbage Collection (GarbageCollection) is one of the common features in modern programming languages. It can automatically manage memory and avoid the tedious work of manual memory allocation and release by developers. As a language that takes both development efficiency and performance into account, the design and implementation of Go's garbage collector (GarbageCollector) is a very important part. The garbage collector of Go language adopts a generational garbage collection strategy, which has three

2023-09-28 comment 0 809

How to use the gc module for garbage collection in Python 2.x

Course Introduction：How to use the gc module for garbage collection in Python2.x Introduction: When programming in Python, we usually do not need to manually manage memory, because there is a memory management mechanism in Python, namely garbage collection (GarbageCollection). The garbage collector (GarbageCollector) automatically detects and reclaims memory space that is no longer used, thereby avoiding memory leaks and memory overflow problems. In Python2.x version, we can pass

2023-08-01 comment 0 1389

How to optimize garbage collection in Go language

Course Introduction：In Go language programming, garbage collection (GarbageCollection) is a very important topic. It is responsible for managing and releasing memory space that is no longer used by the program, ensuring that there will be no memory leaks during the running of the program. Although the Go language's garbage collector (GarbageCollector) is automatic, in actual development we can still optimize the efficiency of garbage collection through some techniques to better utilize system resources and improve program performance. This article will introduce a

2024-03-27 comment 0 916

Why is my Go application not performing as expected?

Course Introduction：Go language has always been known as a high-performance programming language because it is designed for multi-core computers and distributed systems. However, sometimes even though we read official documentation and books and invest a lot of time and effort in writing code, we find that the performance of our Go application is not as expected. Why does this happen? Here are a few possible reasons: Memory Management In Go, memory management is the responsibility of the runtime. Memory is managed through GC (garbagecollector) during runtime.

2023-06-10 comment 0 959

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