Regular Expressions
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Regular expressions are a powerful method of defining number ranges. They are used in several part of the system. Here some examples:
| Regexp | Description | Matches | Not Matches |
|---|---|---|---|
| ^05545$ | Set start and end of string | 05545 | 055453131 |
| ^05545 | Matches anything starting with 05545 | 0554531 0554566 | 5545 055 |
| 05545$ | Matches anything ending with 05545 | 998705545 | 055453 |
| ^055.* | Matches anything starting with 055 | 05545 | 99055 |
| ^0558*99 | Matches anything starting with 055 and with zero or more 8 and ending by 99 | 05588899
05599 || | |
| ^0557+ | Matches anything starting with 055 and with one or more 7 | 05577 0557 | 055 |
| ^0558?987 | Matches one or zero 8 inside the number | 0558987 055987 | 0558999 |
| 05546)99 | Matches either sequences | 0554599 0554699 | 0554799 |
| ^055(45)*99 | Matches zero or more instances of the sequences | 055454599 0554599 05599 | 05544599 |
| ^0559{3}8 | Matches a sequence of three 9 | 0559998 | 05599 |
| ^0559{2,3}8 | Matches from two to three sequence of 9 | 055998 0559998 | 05599998 |
| ^055[1-9] | Matches any digits from 1 to 9 | 0551234 | 0550345 |