Hello All,
I'm using '-w' like any good hacker, but every time I try to use
backreferences in my regexps, I get a warning "\1 better written as $1
at...."
I'm confused because, according to perlretut:
"Although $1 and \1 represent the same thing, care should be taken to
use matched variables $1, $2, ... only outside a regexp and
backreferences \1, \2, ... only inside a regexp; not doing so may lead
to surprising and/or undefined results."
The other source of relevant information seems to be here:
<http://www.perl.com/doc/manual/html/pod/perlre.html#WARNING_on_1_vs_1>
However, I'm having trouble understanding if it is referring to using
backreferences in general, or to a particular case where using \1
instead of $1 is a bad idea.
Here is an example of one of my regexps that produces this warning:
$text =~ s!(.*?)(\()(.*?)(\))!<a\ href=\"\3\" alt=\"\3\">\1<\/a>!g;
Should I be using $1 and $3 instead of \1 and \3 in this case, and if
so, why?
Thanks in advance,
Adam
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