Hello again, I have a snippet of code that produces: 
  Foo Before:

  Topology
  IPClassA
  subnet_address=0
  Topology
  IPClassA
  Device
  model_name=1
  Topology
  IPClassB
  Device
  model_name=2

[download]
My objective is to retain any unique order after every Topology Entry. This is just an example, I actually have a lot more data I'm working with. This is my code: 
use strict;

# Global data structures
use vars qw(@foo @bar);

@bar = qw(Topology IPClassA subnet_address=0 Topology IPClassA Device 
          model_name=1 Topology IPClassB Device model_name=2);

my $i = 0;
my $j = 1;

print "Foo Before:\n\n";
foreach $_ (@bar){
    print "$_\n";}

push @foo, "Topology";
    foreach $_ (@bar)
    {
        if ($bar[$i] eq $bar[$j])
        {
            $i ++;
        $j ++;
    }
    else
    {
        push @foo, $bar[$j];
        $i  = 0;
        $j ++;
    }
    }
        print "\nFoo After:\n\n";
        foreach $_ (@foo){
            print "$_\n";}

[download]
This is the output: 
Foo After:

Topology
IPClassA
subnet_address=0
Device
model_name=1
IPClassB
Device
model_name=2

[download]
It works great except for the fact that I need to push Topology on the array just before IPClassB, because this isn't the same pattern as the previous path beggining with the root Topology. Does anyone have any suggestions. Thanks

In reply to Unique Array Data by The_Rev

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