Regex: Difference between revisions
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ab?c ac, abc |
ab?c ac, abc |
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a\sc a c |
a\sc a c |
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Character Escapes |
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Escaped Char Description |
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ordinary characters Characters other than . $ ^ { [ ( | ) ] } * + ? \ match themselves. |
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\a Matches a bell (alarm) \u0007. |
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\b Matches a backspace \u0008 if in a []; otherwise matches a word boundary (between \w and \W characters). |
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\t Matches a tab \u0009. |
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\r Matches a carriage return \u000D. |
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\v Matches a vertical tab \u000B. |
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\f Matches a form feed \u000C. |
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\n Matches a new line \u000A. |
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\e Matches an escape \u001B. |
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\040 Matches an ASCII character as octal (up to three digits); numbers with no leading zero are backreferences if they have only one digit or if they correspond to a capturing group number. (For more information, see Backreferences.) For example, the character \040 represents a space. |
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\x20 Matches an ASCII character using hexadecimal representation (exactly two digits). |
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\cC Matches an ASCII control character; for example \cC is control-C. |
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\u0020 Matches a Unicode character using a hexadecimal representation (exactly four digits). |
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\* When followed by a character that is not recognized as an escaped character, matches that character. For example, \* is the same as \x2A. |
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Character Classes |
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Char Class Description |
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. Matches any character except \n. If modified by the Singleline option, a period character matches any character. For more information, see Regular Expression Options. |
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[aeiou] Matches any single character included in the specified set of characters. |
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[^aeiou] Matches any single character not in the specified set of characters. |
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[0-9a-fA-F] Use of a hyphen (–) allows specification of contiguous character ranges. |
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\p{name} Matches any character in the named character class specified by {name}. Supported names are Unicode groups and block ranges. For example, Ll, Nd, Z, IsGreek, IsBoxDrawing. |
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\P{name} Matches text not included in groups and block ranges specified in {name}. |
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\w Matches any word character. Equivalent to the Unicode character categories [\p{Ll}\p{Lu}\p{Lt}\p{Lo}\p{Nd}\p{Pc}]. If ECMAScript-compliant behavior is specified with the ECMAScript option, \w is equivalent to [a-zA-Z_0-9]. |
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\W Matches any nonword character. Equivalent to the Unicode categories [^\p{Ll}\p{Lu}\p{Lt}\p{Lo}\p{Nd}\p{Pc}]. If ECMAScript-compliant behavior is specified with the ECMAScript option, \W is equivalent to [^a-zA-Z_0-9]. |
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\s Matches any white-space character. Equivalent to the Unicode character categories [\f\n\r\t\v\x85\p{Z}]. If ECMAScript-compliant behavior is specified with the ECMAScript option, \s is equivalent to [ \f\n\r\t\v]. |
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\S Matches any non-white-space character. Equivalent to the Unicode character categories [^\f\n\r\t\v\x85\p{Z}]. If ECMAScript-compliant behavior is specified with the ECMAScript option, \S is equivalent to [^ \f\n\r\t\v]. |
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\d Matches any decimal digit. Equivalent to \p{Nd} for Unicode and [0-9] for non-Unicode, ECMAScript behavior. |
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\D Matches any nondigit. Equivalent to \P{Nd} for Unicode and [^0-9] for non-Unicode, ECMAScript behavior. |
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