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Self-study IT network Linux load balancing video tutorial

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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

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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

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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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Introduction to the method of drawing using the drawing library in python

Course Introduction：matplotlib is Python's most famous drawing library. This article shares with you examples of how to use matplotlib+numpy to draw a variety of drawings, including filled plots, scatter plots, bar plots, and contour plots. Friends who need it can refer to line plots (contour plots), bitmap plots and 3D plots. Let’s take a look below.

2017-05-12 comment 0 9552

Introductory tutorial on contour lines: 10 recommended zero-based introductory tutorials on contour lines

2017-06-15 comment 0 2368

What are the methods of data visualization?

Course Introduction：Data visualization methods include static charts, dynamic charts, geographical visualization, 3D visualization, interactive visualization, text visualization and big data visualization, etc. Detailed introduction: 1. Static charts are one of the most common data visualization methods. By using various chart libraries, we can create various static charts, such as line charts, bar charts, pie charts, etc.; 2. Dynamic charts can be used in time Changes in the data are shown on the axis. By using JavaScript libraries, we can create various dynamic charts, such as line charts that update in real time, dynamic maps, and more.

2023-08-22 comment 0 7415

What are the drawing methods of Matplotlib?

Course Introduction：Drawing methods include line charts, scatter charts, bar charts, histograms, pie charts, box plots, heat maps, contour charts, 3D graphics, etc. Detailed introduction: 1. Line chart: Use the plot() function to draw a line chart, which can show the changing trend of data over time or other continuous variables; 2. Scatter chart: Use the scatter() function to draw a scatter chart, which can show two The relationship between variables, each data point corresponds to a coordinate; 3. Histogram: Use the bar() or barh() function to draw a histogram, which can show the distribution or comparison of discrete variables, etc.

2023-11-22 comment 0 1376

The rudder of Python data visualization: Navigate the ocean of data and discover treasures

Course Introduction：Python facilitates data visualization with its extensive and powerful libraries. Libraries such as Matplotlib and Seaborn provide tools to create a variety of charts, graphs, and maps, allowing data scientists and analysts to communicate insights effectively. Matplotlib: Build versatile charts Matplotlib is one of the most popular data visualization libraries in Python. It is known for its ability to create custom charts and graphs, including line charts, bar charts, scatter plots, and histograms. Matplotlib also supports 3D plotting and interactive controls, allowing users to dynamically explore data. Seaborn: Statistical chart expert Seaborn is built on Matplotlib and specializes in

2024-04-02 comment 0 673

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