[opensource] regex help!
swaney.29 at osu.edu
Fri Feb 22 17:11:44 EST 2008
There is a potential for other, rarer characters. I know of at least 1
case where someone's OSU username, which is not in the standard format
or magnus, contains the '+' character. Of course, it may be better to
simply make a workaround for administrators.
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William (Bill) E. Triest III wrote:
> Sorry for replying to my own message. I made an error in my first
> post, so I thought I should clarify it. Previously I said that the
> first grouping would allow numbers, but that was only true for the
> perl regex. I also realized I didn't explain why it matched very well
> nor did I point out that it would actually match any string containing
> that substring.
> The problem with what I've provided so far is that it could match
> 12baronda.2foo because it contains a matching substring. In perl you
> could fix this by perpending the regex with ^ and ending it with $ and
> according to wikipedia that's true for POSIX regex's but it may not be
> the case for all regex implementations.
> Generically: [a-zA-Z]+\.[0-9]+
> Also, I think some lastname.n's include hyphens, so you'll want to add
> them into the regex if that's really what you are trying to match.
> Also, depending on what you're trying to do with this, I think there
> are OSU identifiers can take other forms, although it rare (I know
> magnus definately can, but I thought some of the newer ones could
> also). If that's what you are trying to match I would suggest trying:
> I'll break it down to explain:
>  are grouping, and a-z says lowercase letters, A-Z upper case
> letters I'm not positive on the \- for including the literal hyphen,
> but try it. If you only want lowercase letters then just put [a-z]
> The + at the end tells it to have one or more matching in that group
> \. (backslash then a period) means period (backslash to escape it so
> that its a literal period since period has a special meaning in regex's)
> [0-9]+ is another character grouping, but this time only digits.
> Again the + means one or more numbers
> Hope this helps and sorry for multiple posts,
> Silas Baronda wrote:
>> I'm looking for a regex that will match say baronda.2 so just
>> string.xxxx x's being integers.
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