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pointer in perl

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# 1  
Old 07-05-2010
pointer in perl
Hi all,
using Data:: Dumper to display the content which a pointer point to .
$config is a pointer
using Dumper($config) to display the content as follows
Code:
$VAR1 = {
          'Jack' => {
                    'priority' => '0',
                    'remotepasswd' => 'shroot',
                    'remoteaddress' => '10.33.42.44',
                    'logdir' => '/jack/ocsta/log/',
                    'remoteuser' => 'root',
                    'timeout' => '200',
                    'scriptroot' => '/jack/ocsta/testscripts/',
                  },
          'Damon' => {
                     'priority' => '0',
                     'remotepasswd' => 'shroot',
                     'remoteaddress' => '10.33.42.76',
                     'logdir' => '/eweiquu/ocsta/log/',
                     'remoteuser' => 'root',
                     'timeout' => '300',
                     'scriptroot' => '/eweiquu/ocsta/testscripts/',
        };

how can i traverse this hash using the pointer?

N.B:if we want to get the value of Jack. we can use the statement as follows:

Code:
$config-> {"Jack"}->{"timeout"};

Thanks
Damon
Last edited by pludi; 07-05-2010 at 12:31 PM.. Reason: code tags, please...
# 2  
Old 07-05-2010
Perl has no pointers, but references. And you can traverse a hash of hashes (as in your example) the same way as a regular hash:
Code:
foreach my $name ( sort keys %{$config} ) {
    foreach my $option (sort keys %{$config->{$name}} ) {
        print "$name -> $option -> ", $config->{$name}->{$option}, "\n";
    }
}

Last edited by pludi; 07-05-2010 at 01:03 PM..
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