Re: Perlmonks Code Proxy

Always be cautious when using variables as a regexp: if it isn't protected with the \Q...\E sequence, you may be in big trouble. Your $basename var contains dots which are treated like if it were a regexp (Gee... If you understand what I say, you're good ;-)

$basename = 'http://www.perlmonks.org/';
$content =~ s!href="$basename!...
[download]

It will be interpreted as $content=~ s!href="http://www.perl...
Use s!\Qhref="$basename...\E!\Q...\E! instead.
So it will be translated to s!href=http://www\.perl...

Comment on Re: Perlmonks Code Proxy Select or Download Code

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(Ovid) RE(2): Perlmonks Code Proxy by Ovid (Cardinal) on Aug 19, 2000 at 07:57 UTC
Sheesh. That's what I get for posting code too quickly. Fortunately, this hasn't caused a problem as I have used exclamation points as delimiters (and avoided the problem with the slashes) and the dot metacharacters match the actual dot characters. I got lucky! Thanks for pointing that out. This has actually caused me a problem with the `$match` variable as this will often contain characters that will have special meaning in a regex, but I can't simply wrap them in `\Q` and `\E` because of the problems with `$` and `@`, so I'm going to write a short snippet that will handle that substitution for me, but this is turning out to be just a more difficult problem than I imagined! Cheers, Ovid	[reply]
RE: (Ovid) RE(2): Perlmonks Code Proxy by jplindstrom (Monsignor) on Aug 19, 2000 at 18:52 UTC
If you want to have the variable contents being interpreted as a string literal rather than regex chars, the perlfunc:quotemeta function is useful.	[reply]