This appendix summarizes methods of creating and using regular expressions.
This section describes the characters you can use to define regular expressions.
Character escapes are character sequences that match special characters. The following table summarizes useful character escapes.
|Matches the tab character|
|Matches the return character|
|Matches the new-line character|
|Matches a character with ASCII code given by the two or three octal digits |
|Matches a character with ASCII code given by the two hexadecimal digits |
|Matches a character with Unicode representation given by the four hexadecimal digits |
A character class matches one of a set of characters. The following table summarizes useful character class constructs.
|Matches one of the characters inside the brackets. For example, |
|Matches a character that is not inside the brackets. For example, |
|Matches a character between the character first and the character last. For example, |
|This is a wildcard that matches any single character except |