During the 2020 COVID-19 pandemic, numerous research groups have worked to find effective ways to determine flow patterns and crowd densities on the streets of major cities like New York City to gain insight into the effects of stay-at-home and social distancing policies. But sending teams of researchers to the streets to observe and record […]
AI tool for COVID monitoring offers solution to urban congestion Read More »
Astronomers have released the most detailed study of the Milky Way, revealing thousands of “starquakes” and stellar DNA that help pinpoint the habitable corner of the galaxy. Observations by the European Space Agency’s Gaia probe, covering nearly 2 billion stars — about 1 percent of all stars in the Milky Way — have allowed astronomers
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Sorting | Peng Huizhong Editor in Charge | Tu Min Produced | CSDN (ID: CSDNnews) The Ruby language was very popular between 2013 and 2015, but then its popularity declined . As early as 3 years ago, there were remarks in the industry that “Ruby and Ruby on Rails are dead”. However, even today, Sid
GitLab slaps “Ruby on Rails is dead” remarks: I’m still using it! Read More »
Original link: https://www.ifanr.com/app/1494768 For today’s technology media, the existence of Tencent QQ is like a foreign country in the distance, the East in the eyes of the ancient West: it is always shrouded in mystery, and only attracts some attention during a major update, and then reverts to it again. unknown. But if you look
23-year-old QQ is easier to use than you think Read More »
Original link: https://chegva.com/5288.html ◎Knowledge points Special properties and special methods Special attribute __dict__ Special attribute __doc__ Special attribute __slots__ ◎Script practice ▽ Special properties and special methods “””One, special properties and special methods””” “”” In the return value after calling the built-in function dir(), many attributes and methods start and end with double underscores __,
Python Advanced (13) – Get special attributes of object information Read More »
The crontab command is used to submit and manage user tasks that need to be executed periodically, similar to the scheduled tasks under windows . Syntax format: crontab [parameter] Common parameters: Example # 显示计划任务crontab -l # 编辑计划任务crontab -e The format of the scheduled task is minute hour day month week command Respectively: time-sharing sun-month-week commands
Linux common commands-50: crontab Read More »
Original link: https://fatesinger.com/100653 This article is reprinted from: https://fatesinger.com/100653 This site is for inclusion only, and the copyright belongs to the original author.
Miscellaneous in May Read More »
Original link: https://macshuo.com/?p=1804 Before, my friend Selina published an article on the InfoQ writing platform called ” A Recommendable Talent Measurement Standard “. The article introduced a standard summarized by the left ear mouse, which is of great reference value. If you are interested, you can read it. this short article. I have seen the
Talent measurement standards for large factories Read More »
clear command is used to clear the screen. Essentially, the terminal display page is turned back one page, and if you scroll up the screen, you can still see the previous operation. Syntax format: clear [parameter] Example # 清屏clear This article is reprinted from https://xugaoxiang.com/2022/06/14/linux-cmds-49-clear/ This site is for inclusion only, and the copyright belongs
Linux common commands-49: clear Read More »
ufw program is used to manage firewalls. Compared with iptables , it is easier to use. By default, sudo apt install ufw needs to be manually installed. Syntax format: ufw [parameter] Common parameters: Example # 启动ufw enable # 关闭ufw disable # 重启ufw reload # 显示防火墙状态及规则ufw status # 重置配置ufw reset # 允许外部访问80端口ufw allow 80 # 禁止访问80端口ufw
Linux common commands-48: ufw Read More »
The source command is usually used to execute the initialization file that has just been modified to take effect immediately, such as environment variables. Syntax format: source [file] Example # 很多时候，我们安装过一些基础软件，会设置一些环境变量，像PATH，通常是编辑~/.bashrc，想让变量即刻生效，就可以使用source source ~/.bashrc This article is reprinted from https://xugaoxiang.com/2022/06/14/linux-cmds-47-source/ This site is for inclusion only, and the copyright belongs to the original author.
Linux common commands-47: source Read More »
The chown command is used to change the user and user group to which a file or folder belongs. Only super administrators have permission to execute it. Syntax format: chown [parameter] Common parameters: Example # 将test.py文件的用户组和用户都改为xugaoxiang，冒号前的是用户，冒号后的是用户组，很多时候它们的名称是一样的chown xugaoxiang:xugaoxiang test.py # 递归修改文件夹chown -R root:root test This article is reprinted from https://xugaoxiang.com/2022/06/14/linux-cmds-46-chown/ This site is for inclusion only,
Linux common commands-46: chown Read More »
Original link: https://blog.yitianshijie.net/2022/06/14/be-exotic/ Foreword of Yang Ruichun’s “Southern Weekend Special Manuscript”: In my opinion, the choice of words and sentences looks like a writing technique, but it is actually a kind of collective unconscious. The efforts of news writing to get rid of the stereotyped tone for more than 30 years, and to delve deeper,
Replacing vagueness with four likenesses Read More »