Re: Regular Expressions

If I understand you correctly, you want to match a body tag whether or not its comes with modifiers.

You want to strip the \s from within your regex, because with it there, this won't match '<body>', but will match '<body >' and '<body one=fish two=fish>'. As some folks mentioned, you need the s before your first delimiter (/) to indicate that you're substituting one thing for another, and the s after your last delimiter to indicate that your match should be viewed as a single-line (and shouldn't stop at a newline). I think some folks responding forgot to remove the \s from within their regexs - or I got the question wrong. The i, of course, indicates case insensitivity. What we end up with is:

s/(<body.*?>)/$1$OtherStuff/si;

I would prefer, for the sake of style, to use the following instead - indicating that the characters before the > should be anything except >.

s/(<body[^>]*>)/$1$OtherStuff/si;

I also like "pushing" stuff around, so to indicate that the first instance of body should be matched, though as far as I know, it won't make a difference.

s/(<body[^>]*>)(.*)$/$1$OtherStuff$2/si;

Hope it helps!
-Adam

--
Impossible! The Remonster can only be killed by stabbing him in the heart with the ancient bone saber of Zumakalis!

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Re^2: Regular Expressions by dyer85 (Acolyte) on Jun 20, 2005 at 08:49 UTC
You are using a greedy regex there, and `s/<body[^>]>/$1$blah/gi;` will probably grab more than you want. `s/<body[^>]?>/$1$blah/si;` This would be sufficient, and with the s modifier, it will account for <body> spanning multiple lines. I didn't use g, as I doubt you want to match <body> on a global scale. Peace My Site in Progress	[reply] [d/l] [select]
Re^3: Regular Expressions by mrborisguy (Hermit) on Jun 20, 2005 at 13:25 UTC
I don't understand why this would grab more than what is wanted. It seems to me that the `[^>]` will grab everything that isn't a '>', so it'll grab stuff until we finally get to the first instance of '>'. Even though it is greedy, I don't think it would grab past the '>' of the '<body ... >' tag. Care to expand? `$ perl -e 'my $str = "<body something=\"yep\"><a href=\"..\">"; $str = +~ s/<body[^>]>/<body>/; print "$str\n"' <body><a href=".."> $` [download] -Bryan	[reply] [d/l] [select]