[opensource] regex help!

Brian Swaney 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.

-Brian Swaney

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William (Bill) E. Triest III wrote:
> All,
> 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: 
> [a-zA-Z\-]+\.[0-9]+
> I'll break it down to explain:
> [a-zA-Z\-]+
> [] 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
> tcut.
> Hope this helps and sorry for multiple posts,
> Bill
> 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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