On Wednesday, July 3, 2002, at 12:00  PM, Martin Clifford wrote:

> Does [a-zA-Z0-9] (yes, I know [:alnum:] is the same) mean that there 
> can be a number, but it has to follow a letter?  Or would you just do 
> [a-zA-Z][0-9] to do that?

That bracketed construction is called a character class.  It represents 
any *one* of the contained characters.  But not more than one.  So there 
is no following at all, since for all intents and purposes the character 
class matches a single character (unless you use a qualifier like +, ?, 
or *).



Erik Price
Web Developer Temp
Media Lab, H.H. Brown

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