blazar's solution works properly, unlike some of the other solutions given above (++ for him), but mine is more efficient: 2.08 vs 3.68 seconds for 1000 iterations with 100 randomly generated items. Smaller sets show much the same ratio. 
use strict;
use warnings;

### Randomly generate numbers
my @array;
for (0..100) {
    my @n;
    push @n, (int rand 15) + 1;
    for (0..((int rand 3) - 1)) {
        push @n, int rand 15;
    }
    push @array, join '-', @n;
}

### Sort the numbers
my @arr = map { $_ = join '-', @$_ }
          sort { mysort($a, $b) }
          map { $_ = [split '-'] } @array;

print join "\n", @arr;

### mysort does the actual comparisons
sub mysort {
    my ($s1, $s2) = ($#{$_[0]}, $#{$_[1]});
    for (0..($s1 < $s2 ? $s2 : $s1)) {
         no warnings;
         return $_ if $_ = $_[0][$_] <=> $_[1][$_];
    }
    ### N comes before N-0
    return ($s1 < $s2 ? -1 : ($s2 > $s1 ? 1 : 0));
}

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In reply to Re: Sorting an array on two computed fields by TedPride
in thread Sorting an array on two computed fields by jesuashok

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