2009/5/29 Brian Candler <b.candler / pobox.com>:
> Robert Klemme wrote:
>> 2009/5/29 Brian Candler <b.candler / pobox.com>:
>>> The OP explicitly said that he wanted to match single characters. It
>>> would also make sense for other fixed-width fields, or delimited fields.
>>
>> But he did not state explicitly that the _strings_ that he wanted to
>> analyze have fixed length.     >
> But he's not just looking for strings with non-repeating characters.
> Note the rule that says the fourth character must be equal to the second
> character. This is an application-specific rule; I don't think we can
> logically extend that to guess what the rule for the fifth or subsequent
> characters would be.

Well, yes.  I just did it but I see that the conclusion is not
necessarily a valid one.  So let's hope for a better requirements spec
next time. :-)

Cheers

robert

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