#!/usr/bin/env perl

use strict;
use warnings;

use Scalar::Util qw{looks_like_number};

my @master_alpha_list = (
    ['blah', 'asdf', 'foo', 'bar'],
    ['two'],
    ['zzz', 'def', 'ghi'],
    ['one'],
    ['mmm', 'def', 'ghi'],
    ['qqq', 'xyz', 'aaa']
);

my @master_num_list = (
    [ 0, 1, 2, 3 ],
    [ 2 ],
    [ 9, 3, 6 ],
    [ 1 ],
    [ 5, 3, 6 ],
    [ 7, 8, 1 ],
);

my @alpha_asc = sort { @$a <=> @$b || gen_sort() } @master_alpha_list;
my @alpha_dsc = sort { @$a <=> @$b || gen_sort(1) } @master_alpha_list;
my @num_asc = sort { @$a <=> @$b || gen_sort() } @master_num_list;
my @num_dsc = sort { @$a <=> @$b || gen_sort(1) } @master_num_list;

use Data::Dump;
dd $_ for (\@alpha_asc, \@alpha_dsc, \@num_asc, \@num_dsc);

sub gen_sort {
    my ($desc) = @_;

    my $compare = looks_like_number($a->[0]) ? \&cmp_num : \&cmp_alpha;
    my ($x, $y) = $desc ? ($b, $a) : ($a, $b);
    my $cmp;
    ($cmp = $compare->($x->[-$_], $y->[-$_])) ? last : next for 1 .. @$a;

    return $cmp;
}

sub cmp_alpha { $_[0] cmp $_[1] }
sub cmp_num { $_[0] <=> $_[1] }