A regex for version number parsing
- by ajborley
Hi,
I have a version number of the following form:
version.release.modification
where version, release and modification are either a set of digits or the '*' wildcard character. Additionally, any of these numbers (and any preceding .) may be missing.
So the following are valid and parse as:
1.23.456 = version 1, release 23, modification 456
1.23 = version 1, release 23, any modification
1.23.* = version 1, release 23, any modification
1.* = version 1, any release, any modification
1 = version 1, any release, any modification
* = any version, any release, any modification
But these are not valid:
*.12
*123.1
12*
12.*.34
Can anyone provide me a not-too-complex regex to validate and retrieve the release, version and modification numbers?
Many thanks!
Thanks for all the responses! This is ace :)
Based on OneByOne's answer (which looked the simplest to me), I added some non-capturing groups (the '(?:' parts - thanks to VonC for introducing me to non-capturing groups!), so the groups that do capture only contain the digits or * character.
^(?:(\d+)\.)?(?:(\d+)\.)?(\*|\d+)$
Many thanks to everyone!
