tie::hash::namedcapture(3pm) [osx man page]

Tie::Hash::NamedCapture(3pm)				 Perl Programmers Reference Guide			      Tie::Hash::NamedCapture(3pm)

NAME

       Tie::Hash::NamedCapture - Named regexp capture buffers

SYNOPSIS

	   tie my %hash, "Tie::Hash::NamedCapture";
	   # %hash now behaves like %+

	   tie my %hash, "Tie::Hash::NamedCapture", all => 1;
	   # %hash now access buffers from regexp in $qr like %-

DESCRIPTION

       This module is used to implement the special hashes "%+" and "%-", but it can be used to tie other variables as you choose.

       When the "all" parameter is provided, then the tied hash elements will be array refs listing the contents of each capture buffer whose name
       is the same as the associated hash key. If none of these buffers were involved in the match, the contents of that array ref will be as many
       "undef" values as there are capture buffers with that name. In other words, the tied hash will behave as "%-".

       When the "all" parameter is omitted or false, then the tied hash elements will be the contents of the leftmost defined buffer with the name
       of the associated hash key. In other words, the tied hash will behave as "%+".

       The keys of "%-"-like hashes correspond to all buffer names found in the regular expression; the keys of "%+"-like hashes list only the
       names of buffers that have captured (and that are thus associated to defined values).

SEE ALSO

       perlreapi, re, "Pragmatic Modules" in perlmodlib, "%+" in perlvar, "%-" in perlvar.

perl v5.16.2							    2012-10-11					      Tie::Hash::NamedCapture(3pm)

Tie::RefHash(3pm)					 Perl Programmers Reference Guide					 Tie::RefHash(3pm)

NAME

       Tie::RefHash - use references as hash keys

SYNOPSIS

	   require 5.004;
	   use Tie::RefHash;
	   tie HASHVARIABLE, 'Tie::RefHash', LIST;
	   tie HASHVARIABLE, 'Tie::RefHash::Nestable', LIST;

	   untie HASHVARIABLE;

DESCRIPTION

       This module provides the ability to use references as hash keys if you first "tie" the hash variable to this module.  Normally, only the
       keys of the tied hash itself are preserved as references; to use references as keys in hashes-of-hashes, use Tie::RefHash::Nestable,
       included as part of Tie::RefHash.

       It is implemented using the standard perl TIEHASH interface.  Please see the "tie" entry in perlfunc(1) and perltie(1) for more informa-
       tion.

       The Nestable version works by looking for hash references being stored and converting them to tied hashes so that they too can have refer-
       ences as keys.  This will happen without warning whenever you store a reference to one of your own hashes in the tied hash.

EXAMPLE

	   use Tie::RefHash;
	   tie %h, 'Tie::RefHash';
	   $a = [];
	   $b = {};
	   $c = *main;
	   $d = "gunk";
	   $e = sub { 'foo' };
	   %h = ($a => 1, $b => 2, $c => 3, $d => 4, $e => 5);
	   $a->[0] = 'foo';
	   $b->{foo} = 'bar';
	   for (keys %h) {
	      print ref($_), "
";
	   }

	   tie %h, 'Tie::RefHash::Nestable';
	   $h{$a}->{$b} = 1;
	   for (keys %h, keys %{$h{$a}}) {
	      print ref($_), "
";
	   }

AUTHOR

       Gurusamy Sarathy        gsar@activestate.com

VERSION

       Version 1.30

SEE ALSO

       perl(1), perlfunc(1), perltie(1)

perl v5.8.0							    2002-06-01							 Tie::RefHash(3pm)