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Appendix

Escape Character	Description
General characters	Division. $ ^ {[(|) * +? \In addition, other characters match themselves.
\	And alarm)\ U0007Match.
\ B	In a regular expression,\ B Indicates the word boundary (in \ W And \ W ), However, in [] In the character class,\ B Returns a space return. In the replacement mode,\ B Always indicates the return character.
\ T	AndTabCharacter\ U0009Match.
\ R	And carriage return\ U000dMatch.
\ V	VerticalTabCharacter\ U000bMatch.
\ F	And form feed\ U000cMatch.
\ N	Line Break\ U000aMatch.
\ E	AndESCCharacter\ U001bMatch.
\ 040	SetASCIIThe character match is octal (up to three digits). If a number without a leading zero has only one digit or corresponds to the capture group number, the number is backward referenced. For example \ 040 Space.
\ X20	The hexadecimal representation (exactly two digits) andASCIICharacter match.
\ CC	AndASCIIControl Character matching; for example,\ CC IsCTRL-C.
\ U0020	The hexadecimal representation (exactly four digits) andUnicodeCharacter match.
\	It matches the character that is not recognized as an escape character. For example,\* And \ X2a Same.
Character class	Description
.	Division\ NAny character other. If you have usedSinglelineThe period can match any character.
[Aeiou]	Matches any single character in the specified character set.
[^ Aeiou]	Matches any single character that is not in the specified character set.
[0-9a-fa-f]	Use font size(-)Specifies the range of consecutive characters.
\ P {name}	And{Name}Any character in the specified name character class matches. Supported Name:UnicodeGroup and block range. For example,Ll,Nd,Z,Isgreek,Isboxdrawing. Available Getunicodecategory Method to locateUnicodeCategory.
\ P {name}	And{Name}The text that is not included in the group and block range specified in.
\ W	match any word character. It is equivalent to Unicode character Category [\ P {ll} \ P {Lu} \ P {lt} \ P {lo} \ P {nd} \ P {PC} \ P {lm}] . If you use the ecmascript Option to specify a ecmascript action, \ W is equivalent to [a-zA-Z_0-9] .
\ W	Matches any non-word character. EquivalentUnicodeCharacter Type [^ \ P {ll} \ P {Lu} \ P {lt} \ P {lo} \ P {nd} \ P {PC} \ P {lm}]. If you useEcmascriptTheEcmascript, Then\ WEquivalent[^ A-zA-Z_0-9].
\ S	Matches any blank character. EquivalentUnicodeCharacter Type [\ F \ n \ r \ t \ v \ x85 \ P {z}]. If you useEcmascriptTheEcmascript, Then\ SEquivalent[\ F \ n \ r \ t \ v].
\ S	Matches any non-blank characters. EquivalentUnicodeCharacter Type [^ \ F \ n \ r \ t \ v \ x85 \ P {z}]. If you useEcmascriptTheEcmascript, Then\ SEquivalent[^ \ F \ n \ r \ t \ v].
\ D	Matches any decimal number. ForUnicodeCategoryEcmascriptAction, equivalent\ P {nd}For non-UnicodeCategoryEcmascriptAction, equivalent[0-9].
\ D	Matches any non-digit. ForUnicodeCategoryEcmascriptAction, equivalent\ P {nd}For non-UnicodeCategoryEcmascriptAction, equivalent[^ 0-9].
Assertions	Description
^	The match must start with the string or line ..
$	The specified match must appear at the following position: end of the string and end of the string\ NOr the end of a row.
\	The specified match must start with the string (ignoreMultilineOption ).
\ Z	Specifies that the match must appear at the end of the string or at the end of the string.\ NBefore (ignoreMultilineOption ).
\ Z	The specified match must appear at the end of the string (ignoreMultilineOption ).
\ G	The specified match must appear at the end of the previous match. And Match. nextmatch ()When used together, this assertion ensures that all matches are continuous.
\ B	The specified match must appear in\ W(Letters and numbers) and\ WThe boundary between (non-alphanumeric) characters. A match must appear on the word boundary, that is, the first or last character in a word separated by any non-alphanumeric characters.
\ B	The specified match cannot appear in\ BBoundary.
Qualifier	Description
*	Specify zero or more matches. For example \ W *Or (ABC )*. Equivalent{0 ,}.
+	Specify one or more matches. For example \ W +Or (ABC) +. Equivalent{1 ,}.
?	Specify zero or one match. For example \ W?Or (ABC )?. Equivalent{0, 1}.
{N}	SpecifyNSuch (Pizza) {2}.
{N ,}	Specify at leastNSuch (ABC) {2 ,}.
{N, m}	Specify at leastNBut no moreMMatch.
*?	Specify to use the first duplicate match as little as possible (equivalentLazy *).
+?	Specify to use as few duplicates as possible but at least once (equivalentLazy +).
??	Indicates zero repetition (if possible) or one repetition.(Lazy ?).
{N }?	Equivalent{N} (lazy {n }).
{N ,}?	Specify to use as few duplicates as possible but at leastNTimes(Lazy {n ,}).
{N, m }?	BetweenNTimes andMUse as few times as possible(Lazy {n, m }).

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