regex int + comma

Question

Hi,

i need a regex for: 123,456,789,123,4444,... basically comma separated values. The INT part can be 1-4 numbers long, followed by a comma...always in this form...

/^([0-9]{1,4})(\,)?$/

This obviously doesn't work...

Thanks!

Answer 1

Try this:

/^[0-9]{1,4}(?:,[0-9]{1,4})*$/

This will match any comma separated sequence of one or more digit sequences with one to four digits. (?:…) is a so called non-capturing group that’s match cannot be referenced separately like you can with “normal” capturing groups (…).

Answer 2

Try this:

/^\d{1,4}(?:,\d{1,4})*+$/D

This will match any comma-separated sequence of one or more digit sequences with one to four digits. The D modifier makes sure that any trailing newline character does not mistakenly result in a positive match.