Re: Regex confusion

I try that and get complete failure (the regex doesn't match at all).

That second grouping has some odd stuff going on in there; you start a character class, but have another one embedded inside it and it looks like you're also trying to use quantifiers in there, then you have an unescaped - which attempts to specify that you're seeking to match a range between what goes before and what goes after.

So let's step back one square: what kinds of things are you trying to match?

Presented with *this* example, I'd go much simpler and do:

if ( $x=~ /([^.]+)\.(\S+)/ ) { ... }
[download]

Unless those patterns are too forgiving ...

I mistrust all systematizers and avoid them. The will to a system shows a lack of integrity -- F. Nietzsche

Comment on Re: Regex confusion Download Code

Replies are listed 'Best First'.
Re: Re: Regex confusion by neilwatson (Priest) on Aug 07, 2002 at 16:54 UTC
So let's step back one square: what kinds of things are you trying to match? Trying to match: client.project.subproject where: Client and project are manditory. Subproject is optional but, there could be more than one. Client, project and subproject could contain, letters, numbers, _, -, or \& Does that help? Update:Actually your regex `/([^.]+)\.(\S+)/` works well. Thank you. Neil Watson watson-wilson.ca	[reply] [d/l]
Re:^3: Regex confusion by flounder99 (Friar) on Aug 07, 2002 at 17:22 UTC
OK, to match those possible characters (and only those) try something like `m/((?:\w\|\\\&\|\-))\.((?:\w\|\\\&\|\-))/` [download] the \w takes care of letters, numbers and _. I always escape the - out of habit but is unnecessary. The /i is redundant since the \w is case insensitive. Personally I would do a nongreedy match. It will match other characters but it probably won't matter. Something like: `m/(.?)\.(.)/` [download] update -- of course a simple split would do the trick. `my ($client, $project, $subproject) = split /\./, $x;` [download] -- flounder	[reply] [d/l] [select]
Re: Re:^3: Regex confusion by neilwatson (Priest) on Aug 07, 2002 at 18:08 UTC
update -- of course a simple split would do the trick. Neil bangs his head vigourously against his desk. Of course! Why the hell didn't I think of that before? Thank you all for your input. Neil Watson watson-wilson.ca	[reply]
Re: Re: Re: Regex confusion by graff (Chancellor) on Aug 07, 2002 at 17:39 UTC
Arturo is right -- I don't see how anything is getting assigned to $project, since the match does not succeed at all for the initial example. Trying to match: client.project.subproject where: Client and project are manditory. Subproject is optional but, there could be more than one. Client, project and subproject could contain, letters, numbers, _, -, or \& Update:Actually your regex ... works well. Thank you. Arturo's regex will include both your project and all sub-projects in $2. If that's okay, fine. If not, do it like this: `/([^.]+)\.([^.]+)/` [download]	[reply] [d/l]


Pathologically Eclectic Rubbish Lister
	PerlMonks