A handful of comments:
Backreferencing a single, static character is silly. It just wastes
memory and processor time. You're throwing it away, anyway.
{1} is useless. It means "one of". Which would just be the thing by
itself.
Second, {1,} is more commonly written +. Also, you are saying "one or
more backreferenced things" instead of "one or more backreferenced things.
I'd write it like this:
@([a-zA-Z0-9]+)
Then use the first backreference instead of the second.
--Ben Doom
Andy Jarrett wrote:
> Hi
>
> I'm trying to do a look through as string to find usernames and add
> <a> tags around them ala Twitter.
>
> The regex I think is fine but when I use reReplace 's back reference
> I'm not getting the result I thought I would of. Heres the code. Can
> anyone see anything obvious?
>
> Cheers, Andy
>
>
> <!--- String to be manipulated --->
> <cfset str = "First username is @andrew and second is @jarrett" />
> <cfoutput><p>#str#</p></cfoutput>
>
>
> <!--- The Regex
> (@){1} - First back reference is the @ sign. Look for one of these
> ([a-zA-Z0-9]){1,} - Second back reference is the username
> --->
> <cfset reg = "(@){1}([a-zA-Z0-9]){1,}" />
>
> <!--- Using reReplace we take the second back reference and wrap
> an <a> tag around it --->
> <cfset usernamePos = reReplace(str, reg, "@<a href='test'>\2</a>", "all") >
>
> <cfoutput>#usernamePos#</cfoutput>
>
>
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