for my $computer (keys %instructions) {
  my $commands = $instructions{$computer};
  for my $comm (keys %$commands) {
    my $argument_sets = $commands->{$comm};
    for my $args (@$argument_sets) {
      my @values = @$args;
      print "$computer: $comm: [@values]\n";
    }
  }
}
[download]

comp1: cmd2: [test2 type1 view1]
comp1: cmd1: [test1 type1 view1]
comp1: cmd1: [test2 type1 view1]
[download]

Is there any benefit to using "for" instead of "foreach", or is it just a style thing?

My fingers are saved some work? Honestly, 'for' and 'foreach' are interchangeable in Perl syntax. Just read perlsyn.

---

Jeff japhy Pinyan, P.L., P.M., P.O.D, X.S.: Perl, regex, and perl hacker
How can we ever be the sold short or the cheated, we who for every service have long ago been overpaid? ~~ Meister Eckhart

Here's my go.

#!/bin/perl5

use strict;
use warnings;

my $v =
{
  'comp1' => { 
    'cmd2' => [ 
      [ 'test2', 'type1', 'view1' ]
    ],
    'cmd1' => [ 
      [ 'test1', 'type1', 'view1' ], 
      [ 'test2', 'type1', 'view1' ] 
    ] 
  }
};

for my $k1 (sort keys %{$v}){
  print "$k1\n";
  for my $k2 (sort keys %{$v->{$k1}}){
    print "  $k2\n";
    for my $a1 (@{$v->{$k1}{$k2}}){
      for my $a2 (@{$a1}){
        print "    $a2\n";
      }
    print "-" x 20, "\n";
    }
  }
}
__DATA__
---------- Capture Output ----------
> "C:\Perl\bin\perl.exe" _new.pl

comp1
  cmd2
    test2
    type1
    view1
--------------------
  cmd1
    test1
    type1
    view1
--------------------
    test2
    type1
    view1
--------------------

> Terminated with exit code 0.
[download]

Tested ;-)

my $VAR1 = {
'comp1' => {
'cmd2' => [
[ 'test2', 'type1', 'view1' ]
],
'cmd1' => [
[ 'test1', 'type1', 'view1' ],
[ 'test2', 'type1', 'view1' ]
]
}
};
my $array = [];
sub foo {
        my ($ref,$array) = @_;
        if (ref $ref eq 'ARRAY') {
         foreach my $ret (@{$ref}) {
                     if (ref $ret ne '') {
                        foo($ret,$array);
                   } else {
                          push @{$array},$ret;
                        }
                }
        } elsif (ref $ref eq 'HASH') {
                foreach my $ret (keys %{$ref}) {
                        if (ref $ref->{$ret} ne '') {
                                        push @{$array}, $ret;
                                        foo($ref->{$ret},$array);
                        } else {
                                push @{$array},$ref->{$ref};
                        }
                }
        }
}
foo($VAR1,$array);
print " @{$array} \n";
[download]