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Copyright (c) 2005-2023 Olivier PETRUCCI
Regular expressions quick reference :
Here is a listing of the most popular regular expression patterns.| Rule | Syntax |
| Exactly one occurence of x | x |
| At least one occurence of x | x+ |
| 0 or many occurences of x | x* |
| 0 or 1 occurence of x | x? |
| Escape character | \ |
| Any single character | . |
| One character in a predefined set | [list-of-characters] ... examples : [ABCD], [012345789] |
| One character in a character range | [character1-character2] ... examples : [0-9], [a-zA-Z] ... |
| Any character except those contained in a predefined set | [^list-of-characters] ... examples : [^ABCD], [^0-9] |
| Tab | \t |
| New line | \n |
| Carriage return | \r |
| Beginning of the line | ^ |
| End of the line | $ |
Examples :
| Example | Syntax |
| All filenames ending with ".html" | ^.*\.html$ |
| All filenames containing "client" | ^.*client.*$ |
Additional help can be found on Areca's regular expressions wiki