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Top Forums Shell Programming and Scripting Perl regex help - matching parentheses Post 302207376 by cvp on Thursday 19th of June 2008 05:49:58 PM
Old 06-19-2008
Thanks, but that wasn't my question; I already know how to escape parentheses.
My data is grouped in many variations of parentheses, sometimes doubled or tripled up. I wanted to know if there was a way to match all of those variations with one regex.
More examples:
extract "(bar)" from "(foo (bar))"
extract "(bar)" from "((foo (bar)) baz)"
extract "((foo))" from "(((foo)) bar)"
...etc.
The key thing here is matching the same number of closed parentheses as open parentheses. I just don't want to have to resort to using a stack or doing something like:
Code:
$string =~ /(\(+)[^)]*/;
$regex = ')' x length($1);
$match = $&;
if ($' =~ /$regex/) { $match .= $&; }
else { next; }
# etc.

 

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Mojo::Path(3pm) 					User Contributed Perl Documentation					   Mojo::Path(3pm)

NAME
Mojo::Path - Path SYNOPSIS
use Mojo::Path; my $path = Mojo::Path->new('/foo%2Fbar%3B/baz.html'); shift @{$path->parts}; say $path; DESCRIPTION
Mojo::Path is a container for URL paths. ATTRIBUTES
Mojo::Path implements the following attributes. "leading_slash" my $leading_slash = $path->leading_slash; $path = $path->leading_slash(1); Path has a leading slash. "parts" my $parts = $path->parts; $path = $path->parts([qw(foo bar baz)]); The path parts. # Part with slash push @{$path->parts}, 'foo/bar'; "trailing_slash" my $trailing_slash = $path->trailing_slash; $path = $path->trailing_slash(1); Path has a trailing slash. METHODS
Mojo::Path inherits all methods from Mojo::Base and implements the following new ones. "new" my $path = Mojo::Path->new; my $path = Mojo::Path->new('/foo%2Fbar%3B/baz.html'); Construct a new Mojo::Path object. "canonicalize" $path = $path->canonicalize; Canonicalize path. # "/foo/baz" Mojo::Path->new('/foo/bar/../baz')->canonicalize; "clone" my $clone = $path->clone; Clone path. "contains" my $success = $path->contains('/foo'); Check if path contains given prefix. # True Mojo::Path->new('/foo/bar')->contains('/'); Mojo::Path->new('/foo/bar')->contains('/foo'); Mojo::Path->new('/foo/bar')->contains('/foo/bar'); # False Mojo::Path->new('/foo/bar')->contains('/f'); Mojo::Path->new('/foo/bar')->contains('/bar'); Mojo::Path->new('/foo/bar')->contains('/whatever'); "merge" $path = $path->merge('/foo/bar'); $path = $path->merge('foo/bar'); $path = $path->merge(Mojo::Path->new('foo/bar')); Merge paths. # "/baz/yada" Mojo::Path->new('/foo/bar')->merge('/baz/yada'); # "/foo/baz/yada" Mojo::Path->new('/foo/bar')->merge('baz/yada'); # "/foo/bar/baz/yada" Mojo::Path->new('/foo/bar/')->merge('baz/yada'); "parse" $path = $path->parse('/foo%2Fbar%3B/baz.html'); Parse path. Note that %2F will be treated as "/" for security reasons. "to_abs_string" my $string = $path->to_abs_string; Turn path into an absolute string. "to_string" my $string = $path->to_string; Turn path into a string. SEE ALSO
Mojolicious, Mojolicious::Guides, <http://mojolicio.us>. perl v5.14.2 2012-09-05 Mojo::Path(3pm)
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