Hi !

This script should do what you want, specifically my_sort(), the rest is just to get a test environment. 
use strict;

sub my_sort {
  my $max_index = $#{@{$a->{Path}}} >  $#{@{$b->{Path}}} ? $#{@{$a->{P
+ath}}} : $#{@{$b->{Path}}};
  for (0..$max_index) {
    my $r = $a->{Path}->[$_] <=> $b->{Path}->[$_];
    return $r if $r;
  }
  return 0;
}

sub print_tree {
  my $tree = shift;
  for my $member (@$tree) {
    print join (' ', @{$member->{Path}})."\n";
  }
}

my $input = <<EOF;

5 32 37
5 32 38
5 32 39
3 12 11 19 20
3 12 11 21
3 12 22
3 12 23
5 32 40
3 12 24
5 32 41
3 25
5 32 42
2 26
5 32 43
2 26 27
2 26 28
2 26 29
0 1
1 2
1 3
3 12 10
1 4
3 12 11
1 5
3 12
2 6
3 12 13
3 12 7
3 12 11 19 14
3 12 8
2 26 30
3 12 11 19 15
3 12 9
5 32 31
3 12 11 19 16
5 32
3 12 11 19 17
5 32 33
3 12 11 19 18
5 32 34
3 12 11 19
5 32 35
5 32 36
EOF

#
# prepare array of hashes
#
my @Tree;
for (split "\n", $input) {
  my @a = split (' ', $_);
  push @Tree, {Path=>\@a};
}

print "ORIGINAL:\n";
print_tree(\@Tree);

my @Tree_sorted = sort my_sort @Tree;

print "SORTED:\n";
print_tree(\@Tree_sorted);

[download]
---- kurt

In reply to Re: Complex Sort - using varying numbers of parameters by amphiplex
in thread Complex Sort - using varying numbers of parameters by George_Sherston

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.