UPDATED MY POST. how do I access it from sub two? 
#!/usr/bin/perl -w

use strict;
system('clear');

my $test = first();
two($test);

sub first{
    my @data;
    my %objREF;

    $data[2] = 'hi there';
    $objREF{poker} = \$data[2];
}

sub two{
    my $objREF = shift;
    
    #print "$objREF{'poker'}";
    #print "$$objREF{'poker'}";
    #print "$objREF->{'poker'}";
    #print "$$objREF->{'poker'}";
    #print "$$$objREF{'poker'}";
    #print "$$$$objREF{'poker'}";
    #print "${$objREF{'poker'}}\n";
    print "$${$objREF->{'poker'}}\n";

}

[download]
### original post ###
I have read that linked lists in perl are slow but I can't quite find an example of one. Is this a linked list? If so how can I change it without losing any of the functionality? 
#!/usr/bin/perl -w

use strict;
system('clear');

my @data;
$data[2] = 'hi there';

my %objREF;
$objREF{poker} = \$data[2];
 
 
print "struct example\n";
print "======================================\n";
print "original value:\n";
print_me();

print "change by array value:\n";
$data[2] = 'joker';
print_me();

print "change value by ref:\n";
${$objREF{poker}} = 'batman';
print_me();

print "change the array\n";
$data[2] = 'robin';
print_me();

sub print_me{
    print "array is: $data[2]\n";
    print "Ref is: ${$objREF{poker}}\n\n";
}

[download]

Edit by castaway - restored original content

In reply to code sample: possible improvements by arcnon

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