Simple Regex

[shapper]

Hello,

I need a regex expression that allows only numbers in the following
format:

2312-986

The first number can't start with 0:
0231-123 is invalid.

However:
1231-012 is valid

Could someone help me out?

Thanks,
Miguel

 

[Peter Bradley]

[1-9]\d{3}-\d{3}

Ought to do it, I would think. It checks out in my RegEx checker, anyway,
using the examples you give.


Peter

 

[Mark Rae]

Could someone help me out?

[1-9][0-9][0-9][0-9]-[0-9][0-9][0-9]

I'm sure there are much shorter and cleverer ways using groups etc...

 

[Peter Bradley]

Sorry to reply to myself, but I miscopied my RegEx. It should, of course,
be:

^[1-9]\d{3}-\d{3}$

Since I'm assuming you want simply this format and nothing else. If you
leave the start and finish markers (^, $) out then it will match the format
anywhere in the expression.
e.g. 2222abd1234-023xxxx would match

Apologies


Peter

[1-9]\d{3}-\d{3}

Ought to do it, I would think. It checks out in my RegEx checker, anyway,
using the examples you give.


Peter

Hello,

I need a regex expression that allows only numbers in the following
format:

2312-986

The first number can't start with 0:
0231-123 is invalid.

However:
1231-012 is valid

Could someone help me out?

Thanks,
Miguel