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This article will explain in detail the special characters that need to be escaped in the rules. The editor thinks it is very practical, so I share it for you as a reference. I hope you can get something after reading this article.

If you want to find a file with a * in the file name, you need to escape *, that is, add a\ to it. Ls\ * .txt. Regular expressions have the following special characters. Need to escape

Special character

Description

$

Matches the end of the input string. If the Multiline property of the RegExp object is set, $also matches'\ n'or'\ r'. To match the $character itself, use\ $.

(.)

Marks the start and end positions of a subexpression. Subexpressions can be obtained for later use. To match these characters, use\ (and\).

*

Matches the previous subexpression zero or more times. To match the * character, use\ *.

+

Matches the previous subexpression one or more times. To match the + character, use\ +.

.

Matches any single character except the newline character\ n. To match., use\.

[]

Marks the beginning of a bracketed expression. To match [, use\ [.

?

Matches the previous subexpression zero or once, or indicates a non-greedy qualifier. To play Standard PvP match? Characters, please use\?

\

Marks the next character as either a special character, a literal character, a backward reference, or an octal escape character. For example,'n' matches the character'n'. \ n' matches the newline character. The sequence'\ 'matches "\", while'\ ('matches "(".

^

Matches the start position of the input string unless used in a square bracket expression, which indicates that the character collection is not accepted. To match the ^ character itself, use\ ^.

{}

Marks the beginning of the qualifier expression. To match {, use\ {.

| |

Indicates a choice between the two. To match |, use\ |.

So it is.

*. ? + $^ [] () {} |\ /

You construct regular expressions in the same way as you create mathematical expressions. That is, a variety of metacharacters and operators are used to combine small expressions to create larger expressions. The components of a regular expression can be a single character, a character collection, a character range, a choice between characters, or any combination of all these components.

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