Regex for Comma Separated Number or Just Number

Question

This is something of a follow up from a previous question. The requirements have changed, and I\'m looking for some help with coming up with regex for either a comma separated n

Answer 1

One thing i've noticed with all these is that the first bit of the regex allows for '0' based numbers to work. For example the number:

0,123,456

Would match using the accepted answer. I've been using:

((?

Which also ensures that the number has nothing in front of it. It does not catch numbers of less then 1,000 however. This was to prevent ill-formatted numbers from being captured at all. If the final + were a ? the following numbers would be captured:

0,123
1,2 (as 2 separate numbers)

I have a strange set of numbers to match for (integers with commas, with spaces and without both), so i'm using pretty restrictive regexs to capture these groups.

Anyway, something to think about!