Regex to accept numbers and/or number range separated by commas, but between range 1-64

Question

I need to validate a string entered by user. The string should allow numbers or ranges, separated by comma. The numbers must be between 1 and 64.

Sample: 1,8,7-9,10-12,20-45

A space is allowed before and after a comma or '-'.

Answer 1

Here you go,

^(?:6[0-4]|[1-5]\d|[1-9])(?: *- *(?:6[0-4]|[1-5]\d|[1-9]))?(?: *, *(?:6[0-4]|[1-5]\d|[1-9])(?: *- *(?:6[0-4]|[1-5]\d|[1-9]))?)*$

I used <space>* instead of \s* because \s matches newline characters also. Use \s instead of a space, if you have no problem about newline character. Use \s? instead of <space>*, if you want to allow an optional space not zero or more spaces.

DEMO

Answer 2

This looks like it's going to be gross. I don't think there's a simple answer because regex matches strings, not numbers. as it turns out, a number between 0 and 64 looks something like this

[1-6]?[0-9]

some maybe with a range incorporated (but not spaces or commas)

[1-6]?[0-9](\-[1-6]?[0-9])?

EDIT

Here I manually entered spaces and commas with a "?" directly after (appears once or not at all), if you'll allow multiple space, change the relevant "?" to "*" I can't 100% promise this will work, but constructing it piece by piece, I believe it will work.

\([1-6]?[0-9]\( ?\- ?[1-6]?[0-9]\)? ?,? ?\)+

I will try to update if I cook up something better.

EDIT2

My old pattern would match 0 if I had written in grouping correctly. Let's try this:

((([1-5]?[0-9])|(6[0-4])((\s?\-\s?([1-5]?[0-9])|(6[0-4]))?)(\s?,\s?)?)+

Happy Coding! Leave a comment if you have any questions.

Answer 3

This should match an integer between 1-64.

([1-9]|[1-5][0-9]|6[0-4])

This should accept ranges as well.

([1-9]|[1-5][0-9]|6[0-4])(-([1-9]|[1-5][0-9]|6[0-4]))?

To match one or more in a single line.

^(([1-9]|[1-5][0-9]|6[0-4])(-([1-9]|[1-5][0-9]|6[0-4]))?\s*($|,\s*))+$