Ricardo and Garrett
Thank you both so much - I am quite sure that I would not have come up
with anything as good (at least not for a long time).
Paul Newton
Ricardo Aráoz wrote:
> Garrett Fitzgerald wrote:
>
>> On 11/3/07, Ricardo Aráoz <[EMAIL PROTECTED]> wrote:
>>
>>> Garrett Fitzgerald wrote:
>>>
>>>> On 11/3/07, Ricardo Aráoz <[EMAIL PROTECTED]> wrote:
>>>>
>>>>> ^(?!.{11,})(?:(?:C{0,10}N{0,10})|(?:N{0,10}C{0,10}))$
>>>>>
>>>>> Explanation : matches a beginning of string not followed by 11 or more
>>>>> characters (that would be up to 10 characters total string length) and
>>>>> then either none to 10 C's followed by none to 10 N's or none to 10 N's
>>>>> followed by none to 10 C's.
>>>>>
>>>> That's almost exactly it. Nice job. You just need to change it so the
>>>> first range in each is {1,10} so that it doesn't match the empty
>>>> string.
>>>>
>>> But isn't a string of all C's (or N's) a valid one? Then you must have
>>> {0,10}.
>>>
>> You do: it's just the second range on each side of the or.
>>
>> ^(?!.{11,})(?:(?:C{1,10}N{0,10})|(?:N{1,10}C{0,10}))$
>>
>>
>>
>
> Smart!
>
>
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