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Self-study IT network Linux load balancing video tutorial

Course Intermediate 11274

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 17599

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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How to use canvas to create a useful graffiti drawing board

Course Introduction：This time I will show you how to use canvas to make a useful graffiti drawing board. What are the precautions for using canvas to make a useful graffiti drawing board? Here is a practical case, let’s take a look. Get cursor coordinates in canvas

2018-03-12 comment 0 2589

html5 canvas simple drawing board implementation code_html5 tutorial skills

Course Introduction：Canvas is a simple drawing board. It took a few hours to make a simple thing. It is just a preliminary demo at the moment. I will improve it when I have time.

2016-05-16 comment 0 1296

Use canvas to design a simple drawing board

Course Introduction：I talked about some of the basic knowledge of canvasAPI before. Just looking at the introduction of the API is really boring. I need something that can stimulate my inner passion to motivate myself to learn, so I created a small example to accompany the learning of canvasAPI. In this way, through the API Knowledge, combined with the application of small examples, can better understand these properties and methods of canvas, and can also inspire your own inspiration and feelings to create canvas special effects. Well, please call me Lei Feng, you are welcome!

2017-06-19 comment 0 2577

Introduction to how to use HTML5 to make a drawing board_html5 tutorial skills

Course Introduction：To make a drawing board, naturally use HTML5 canvas to achieve it. In canvas we can draw circles, rectangles, custom lines, etc. This time I mainly use drawing circles and lines to achieve it. Support response to touch events in html

2016-05-16 comment 0 1808

How to use Python's Turtle to create your own starry sky

Course Introduction：Turtle Basics Turtle (Turtle) is an important package (built-in package) for drawing in Python. It contains a wealth of drawing tools and various drawing functions. After you learn to draw with Turtle, you can draw whatever you want. 1.1 Turtle drawing board Turtle's drawing board size can be set using turtle.screensize() function turtle.screensize(width,height,bg): Set the size of the drawing board, including length and width, width is width, height is height, bg Color the canvas 1.2 Turtle brush Turtle’s brush has several commonly used functions ① turtle.

2023-04-25 comment 0 2379

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