I would carry it around in your recursion. I have also eliminated the global @position: 

use strict;
use warnings;

my @tree = ( 'ng1',
                         [ 'ng1_1', 
                             [ 'ng1_1_1', [ 'ng1_1_1_u1', 'ng1_1_1_u2'
+, 'ng1_1_1_u3' ],
                                 'ng1_1_2', 'ng1_1_3', 'ng1_1_4' ],
                             'ng1_2', 'ng1_3', 'ng1_4' ],
                         'ng2', 
                         [ 'ng2_1', [ 'ng2_1_u1', 'ng2_1_u2', 'ng2_1_u
+3' ],
                             'ng2_2', 'ng2_3', 'ng2_4' ],
                         'ng3',
                         [ 'ng3_1', 'ng3_2', 'ng3_3', 'ng3_4' ],
        );

sub findElementPosition{
        my ($tree,$position,$parent,$needle) = @_;
        my $previous;
        my $pos = 0;
        for my $treeElement (@{$tree}){
                if (ref $treeElement eq "ARRAY"){
                        findElementPosition($treeElement,[@$position,$
+pos],$previous,$needle);
                }    else {
                        if ($treeElement eq $needle){
                                print "[$_]" for @$position[0..@$posit
+ion-2];
                                print "[",$position->[-1]-1,"] $parent
+ \n";
                        }
                        $previous = $treeElement;
                }
                $pos++;
        }
}

my @position;

findElementPosition( \@tree, \@position, "", "ng1_1_1_u3" );
findElementPosition( \@tree, \@position, "", "ng3_1" );

[download]

In reply to Re: How to access adjacent/parent array OR how to access multi dimensional array with dynamic indexes by hdb
in thread How to access adjacent/parent array OR how to access multi dimensional array with dynamic indexes by wakatana

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