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I. Introduction of IFSThe Shell script has a variable called IFS (Internal field Seprator), the internal domain delimiter. The full definition is the shell uses the value stored in IFS, which are the space, tab, and newline characters by default, to

Do you still remember the admission poster from the Department of Information Technology at the University of Tokyo? If you get the correct answer, you will be admitted. At that time, people and Weibo were crazy to repost. Now, the Western Mail

//The following is the URI of the commonly used intent and its examples, including the common intent used in most applications. 002 003//First, open a Web page, the category is Intent.action_view004 005 URI uri = Uri.parse ("http://blog.3gstdy.com/")

//The following is the URI of the frequently used intent and its demo sample, including the common intent used in most applications. 002 003//First, open a Web page, the category is Intent.action_view004 005 URI uri = Uri.parse

Python has a built-in pop3 library, so we can use it directly to download and process emails. In fact, if we don't need poplib, we can still complete all the jobs in that example: it is through the telnet protocol. In python, there is a telnetlib,

Recently contacted the needs of timed execution procedures, so learning to understand a bit crontab. This article first introduces Crontab's grammar knowledge, then makes a demo.First, crontab grammar1.crontab Basic Format{minute} {Hour}

Crontab: scheduled task execution. Crontab: scheduled task execution. I recently came into contact with the needs of scheduled execution programs, so I learned about crontab. This article first introduces the syntax knowledge of crontab, and then

Linux Command learning Summary: hexdump, Command introduction: Hexdump is a binary file viewing tool in Linux. It can convert binary files into ASCII, octal, decimal, and hexadecimal formats for viewing. Command path:/usr/bin/hexdump Command

Regular expression parsing in JavaScript A regular expression is an object that describes the character pattern, and the JavaScript RegExp object and string object define methods for performing powerful pattern matching and text abetting and

Regular expression parsing in JavaScriptA regular expression is an object that describes a character pattern, and JavaScript's RegExp objects and string objects define methods that use regular expressions to perform powerful pattern matching and