Thanks Garrett - I'll play with that his evening !
Paul Newton
Garrett Fitzgerald wrote:
> On 11/1/07, Paul Newton <[EMAIL PROTECTED]> wrote:
>
>> Hi all
>>
>> I need to check an input value against the following criteria
>>
>> 1. Length 1 - 10 characters
>> 2. Each character may be either "C" or "N"
>> 3. All C's must be in a group, so CCNNC would be invalid
>> 4. All N's must be in a single group (as above)
>> 5. Can be all C's
>> 6. Can be all N's
>> 7. Can be x C's followed by y N's
>> 8. Can be x N's followed by y C's
>> 9. 1 <= x+y <= 10 (same as 1 above, really)
>>
>
> I think this regexp meets all your criteria except the total length.
>
> (C+N{0,9}(?!C)|N+C{0,9}(?!N))
>
> You can do that with a LEN, I suppose.... Be nice if someone else can
> chime in with a way to do it all in the RegExp, without having to
> specify all the matches. :-)
>
>
[excessive quoting removed by server]
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