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Environment and installation Operating system: win10 Installation address: https://github.com/VirusTotal/yara/releases/tag/v4.2.0-rc1 Just under this address Tool use Open in cmd directory Command: yara my_rule my_file The first parameter is your yara rule file, and the second parameter is the detection file, which can be a directo ...

What is a regular expression? Regular expressions are objects that describe character patterns. Regular expressions are search patterns formed by a sequence of characters. Syntax of regular expression: / regular expression body / modifier (optional) For example: const exp = /abc/i /abc/i is a regular expression, where abc is a regular expre ...

1, Logical operator Logical operators are mainly used to judge whether an expression is true or false. In mysql, the return result of logical operators is 1, 0 or NULL. MySQL supports four logical operators as follows: 1.1 logical non operator Logical non (NOT or!) Operator means to return 1 when the given value is 0Returns 0 when the g ...

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1. Greed Greedy matching: when regular expressions contain qualifiers that can accept repetition, the usual behavior is to match as many characters as possible (on the premise that the whole expression can be matched). This matching method is called greedy matching. Features: read the whole string at one time for matching. Whenever there is ...

regular expression Learning regular expressions has always been a headache, but the main reason is that there are too many characters and rules. Therefore, for me, it is because of laziness. I can change this state by summing up carefully and slowly. Regular expression is actually a tool for string pattern matching, so as to realize the func ...

preface: There are many kinds of text processors or text editors in Linux/UNIX system, including VIM editor and grep, which we have learned before. grep, sed and awk are text processing tools often used in shell programming, which are called three swordsmen of shell programming. 1, sed editor (1) Overview of sed editor sed is a flow editor ...

I regular expression 1. Concept of regular expression Regular expression, also known as regular expression, is often abbreviated as regex, regexp or RE in code. It is a concept of computer science. Regular expressions are often used to retrieve and replace text that conforms to a pattern (rule). There is not only one regular expression, and ...

catalogue Dynamic regular expression brief introduction Dynamic matching expression - (?? expr) Modify the command matching the expression - (? @ cmd) Functional requirements of (@ cmd) Override command in expression - ${cmd} Dynamic regular expression brief introduction In a dynamic expression, you can require regexp to match. The ...

@[TOC] table of contents according to Rookie tutorial Add a few personal understanding and finishing, which can be used to review the knowledge points. For details, please refer to the original link 1. re.match function re match(pattern,string,flags=0) re.match only matches the beginning of the string. If the beginning of the string does not ...