regularexpressions
RegEx
Quantifiers
| * | 0 or more |
| + | 1 or more |
| ? | 0 or 1 |
| {3} | Exactly 3 |
| {3,} | 3 or more |
| {3,5} | 3, 4 or 5 |
Groups and Ranges
| . | Any character except new line |
| (a{|}b) | a or b |
| (…) | Group |
| (?:…) | Passive Group |
| {[abc} | Range (a or b or c) |
| {[^abc} | Not a or b or c |
| {[a-q} | Letter between a and q |
| {[A-Q} | Upper case between A and Q |
| {[0-7} | Digit between 0 and 7 |
| \n | Digit between 0 and 7 |
Anchors
| ^ or \A | Start of string |
| $ or \Z | End of string |
| \b | Word boundary |
| \B | Not word boundary |
| \< | Start of word |
| \> | End of word |
POSIX
| {[:upper:} | Upper case letters |
| {[:lower:} | Lower case letters |
| {[:alpha:} | All letters |
| {[:alnum:} | Digits and letters |
| {[:digit:} | Digits |
| {[:punct:} | Punctuation |
| {[:blank:} | Space and tab |
| {[:space:} | Blank characters |
| {[:word:} | Digits, letters and underscore |
Character Classes
| \c | Control character |
| \s | White space |
| \S | Not white space |
| \d | Digit |
| \D | Not digit |
| \w | Word |
| \W | Not word |
Special Characters
| \ | Escape Character |
| \n | New line |
| \r | Carriage return |
| \t | Tab |
| \v | Vertical tab |
| \f | Form feed |
regularexpressions.txt · Last modified: 2017/11/09 02:52 by mark
