Regex Question
mskala at ansuz.sooke.bc.ca
mskala at ansuz.sooke.bc.ca
Wed Jul 17 21:58:05 CDT 2002
On Wed, 17 Jul 2002, abez wrote:
> $varname
> ${varname}
> but doesn't find
> $varname{
Balancing parentheses with a regular expression is in general impossible;
in fact that's the subject of about a week's worth of lectures in
third-year computer science. However, if you're reasonably sure that
"varname" isn't going to contain {}s itself, then you can probably get
away with something like this:
/\$(\{[a-z]*\})|([a-z]*)/
Feel free to substitute something smarter than [a-z]* to match
varname. The key is to repeat it, because if you try to match an optional
{, varname, and then an optional }, there's no way to avoid matching
${varname .
--
Matthew Skala
mskala at ansuz.sooke.bc.ca Embrace and defend.
http://ansuz.sooke.bc.ca/
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