Slightly shorter code (slow night): 
use strict;
use warnings;
use Data::Dumper;

my $forwardList = buildList(1 .. 4);
my $reverseList = buildList(reverse getList($forwardList));

print join (', ', getList($forwardList)), "\n";;
print join (', ', getList($reverseList)), "\n";;

sub buildList {
  my ($head, $node);
  for (@_){       
     $node = add_node($node,$_);
     $head ||= $node;   
    }
    return $head;
}

sub add_node{
  my ($prev, $data) = @_;
  return $prev->{next} ={data=>$data, next=>undef};
}

sub getList {
    my ($head) = @_;
    my @data = ($head->{data});
    
    while ( $head = $head->{next}) {
        push @data, $head->{data};
    }
    
    return @data;
}

[download]
(The last node points to undef .. there is no empty node)

        "Think of how stupid the average person is, and realize half of them are stupider than that." - George Carlin

In reply to Re^2: Reversing a singly linked list by NetWallah
in thread Reversing a singly linked list by punitpawar

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