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Self-study IT network Linux load balancing video tutorial

Course Intermediate 11360

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 17663

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 11378

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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There are differences between the two methods of obtaining timestamps in PHP. Why?

Try to use two methods of PHP to obtain the current timestamp. There are differences. However, the two timestamps converted into time are indeed the same time point. I checked the unit of the timestamp on the network is seconds. Why is this happening? {Code...} The output result is: timestamp is 1:1492131843 timestamp is 2:1492134...

2017-05-16 13:14:11

Unforeseen results occur when calculating time difference in seconds in PHP by converting two dates to Unix timestamps.

According to the title, I'm trying to find the difference in seconds and then convert those seconds to days and hours. After reading and following similar questions, I built a function that adds the hour, day, week, month, or year I want to today's datetime, and I get the correct results from this part. However, I then try to convert the two dates (start date and move date) to unix timestamps, subtract both timestamps to find the difference between the two dates in seconds, and then convert to days or minutes (/86400 and /3600) I don't get the results I expected. This is the code..&

2023-09-03 09:22:01

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

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Building a Unit Converter App in Angular with Tailwind CSS

Course Introduction：Unit converters are handy tools for converting measurements between different units, making it easier to work with various systems of measurement. In this tutorial, we'll build a unit converter app in Angular that allows users to convert values betwe

2024-09-04 comment 0 737

How Can I Convert Seconds into Days, Hours, Minutes, and Seconds in PHP?

Course Introduction：Converting Seconds to Days, Hours, Minutes, and Seconds: A Detailed ApproachIn PHP, converting seconds to more granular time units requires some...

2024-12-13 comment 0 972

Operation content of modifying Proe imperial drawings to metric

Course Introduction：1. Open the drawing file to be transferred to the unit. 2. First click--Analysis--Measure--Diameter. 3. Click on the arc part of the cylinder, you can see that the current diameter is 10. 4. Click - Edit - Settings -. 5. Click --Units-- in the pop-up waterfall menu. 6. You can see that the default unit is --- inches pounds seconds --- (that is, the length unit of the part is inches, the weight unit is pounds, and the time unit is seconds). 7. Select--Millimeters Newton Seconds MMNS--Settings---. At this time, a dialog box will pop up. In order to illustrate the effect, we select - Convert Size - Confirm to try it, and then close the previous dialog box. 8. Now measure the diameter of the outer circle. You will find that the diameter has changed from 10 to 254, which means -convert size-

2024-06-10 comment 0 682

Knocking on the Door of Python Data Analysis: A Beginner's Guide

Course Introduction：Prerequisites Computer basics Basic programming concepts (such as variables, data types, and conditional statements) Install python and necessary libraries (such as pandas, NumPy, and Matplotlib) Step 1: Data import and exploration Use the Pandas library to read in CSV, excel, or database Data exploration of data structures, data types and statistics Find missing values, outliers and data distribution patterns Step 2: Data cleaning Process missing values (e.g. fill with mean or median) Remove duplicates Transform data types (e.g. string Convert to numbers) Normalize the data (e.g. convert different measurement units to the same unit) Step 3: Data Analysis Descriptive Statistics: Calculate statistics such as mean, median, standard deviation, etc.

2024-03-17 comment 0 1212

Convert angles to radians using java's Math.toRadians() function

Course Introduction：Convert angles to radians using Java's Math.toRadians() function In mathematics and physics, angles and radians are two commonly used units of angle measurement. Sometimes we need to convert between these two units. In Java, we can convert angles to radians using toRadians() function of Math class. Math.toRadians() is a static method in the Math class that accepts an angle value expressed in degrees and returns the corresponding radians value. The following is to make

2023-07-24 comment 0 2548

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