In programming, dynamic variable names do not have specific names hardcoded in scripts. They are dynamically named using string values from other sources. Dynamic variables are rarely used in JavaScript . But in some cases, they are useful. Unlike PHP, there is no special implementation of dynamic variable names in JavaScript. But similar results can […]
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1. Problem description: When the height is fixed or not fixed, it is difficult to achieve vertical centering of single-line or multi-line text; Second, the solution: 1. Use the line-height property to set the line-height to be the same height as the element height. Limitations: Only applicable to single-line text, with great limitations. Code: .box
7 ways to vertically center text in CSS Read More »
what is npm npm ( node pakage manage) is a third-party package manager and is the default package management tool for the Node.js platform. what npm does Through npm, you can install, share, distribute code, and manage project dependencies. example: When configuring webpack, many third-party modules (modules occupy a pit) need to be installed through
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This article describes how to create a web server in Linux system, and set up Systemd to automatically start and manage the operation of the web server. Set up an Echo server First write a simple echo server in Python and store it in /opt/echo_server.py : #!/usr/bin/env python3 import socket # create socket serv =
How to add an automatic startup program at boot through systemd in linux Ubuntu Read More »
The traceroute command is used to trace the transmission path of data packets on the network. The default data packet size sent is 40 bytes. Through this command, we can know what path the information takes from your computer to the host on the Internet. Syntax format: traceroute [parameter] [domain name or IP] Common parameters:
Linux common commands-65: traceroute Read More »
locate command is similar in function to find -name , but much faster than find . Syntax format: locate [parameter] [file] Common parameters: Example locate /etc/em This article is reprinted from https://xugaoxiang.com/2022/06/19/linux-cmds-64-locate/ This site is for inclusion only, and the copyright belongs to the original author.
Linux common commands-64: locate Read More »
The date command is used to display or set the system date and time. Syntax format: date [options] [+output form] Common parameters: Example # 显示当前系统时间date # 设置系统时间date -s “20220320 12:00:00” # 只设置日期date -s 03/20/2022 # 只修改时间date -s 12:00:00 This article is reprinted from https://xugaoxiang.com/2022/06/19/linux-cmds-63-date/ This site is for inclusion only, and the copyright belongs to
Linux common commands -63: date Read More »
The wc command counts the number of bytes, words, and lines in the specified file, and displays the statistics for output. Syntax format: wc [parameter] [file] Common parameters: Example # 统计文件test.txt中的字数wc -w test.txt # 统计文件test.txt中的字节数wc -c test.txt # 统计文件test.txt中的行数wc -l test.txt This article is reprinted from https://xugaoxiang.com/2022/06/19/linux-cmds-62-wc/ This site is for inclusion only, and the
Linux common commands-62: wc Read More »
The ln command means link, and the function is to create a link for a certain file. There are two kinds of links here, one is a hard link, and the other is a symbolic link, also called a soft link. A hard link is a copy of the source file, the same size as
Linux common commands-61: ln Read More »
The first alpha release of PHP 8.2 is now available for testing. PHP 8.2 Alpha 1 is the first QA release of PHP 8.2. Although they are unstable and not suitable for use in production systems, they provide an opportunity to test upcoming PHP versions in advance. PHP 8.2 Alpha 1 is the first release
PHP 8.2 Alpha 1 released on June 10 Read More »
Original link: https://www.kawabangga.com/posts/4545 When I was working at Ant Financial, I saw and used a lot of poorly designed systems, including the worst thing called an AntX, and I still shudder when I think about it now. The specific implementation has not been remembered clearly, because I have never really mastered it. Just remember that
Design configuration items like UI Read More »
Original link: https://wiki.eryajf.net/pages/67892e/ If you think the project is good, welcome to come Star This article is reproduced from: https://wiki.eryajf.net/pages/67892e/ This site is for inclusion only, and the copyright belongs to the original author.
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Original link: https://conge.github.io/2022/06/18/ReturnPoint-slow-down/ All beginnings are hard. The same goes for running. But if you insist on running for a few days, many people will experience the feeling of getting more and more excited when running after the initial difficulties. At this point, if you think you’ve finally convinced your body to stop resisting your
Turning Point 2224 ｜ Beginners, when you run more and more, you should stop Read More »