#!/usr/bin/perl -l

sub LRsort {
  @$a <=> @$b
      ||
  do {
    for (1..@$a) {
      my $LR = $a->[-$_] =~ /^\d+(?:\.\d+)?$/ &&
               $b->[-$_] =~ /^\d+(?:\.\d+)?$/
             ? $a->[-$_] <=> $b->[-$_]
             : $a->[-$_] cmp $b->[-$_];
      return $LR if $LR;
    }
  }
}

sub d { print '[',join(', ',map{"'$_'"}@$_),']' for @_ }

my @list = (
    ['blah', 'asdf', 'foo', 'bar'],
    ['two'],
    ['zzz', 'def', 'ghi'],
    ['one'],
    ['mmm', 'def', 'ghi'],
    ['qqq', 'xyz', 'aaa'],
);
my @sorted = sort LRsort @list;
print "strings sorted"; d @sorted;
$_ = [ map { my $o; $o+= ord for split//;$o } @$_ ] for @list;
print "strings numified"; d @list;
my @sorted = sort LRsort @list;
print "numeric"; d @sorted;
_END_
strings sorted
['one']
['two']
['qqq', 'xyz', 'aaa']
['mmm', 'def', 'ghi']
['zzz', 'def', 'ghi']
['blah', 'asdf', 'foo', 'bar']
strings numified
['407', '414', '324', '309']
['346']
['366', '303', '312']
['322']
['327', '303', '312']
['339', '363', '291']
numeric
['322']
['346']
['339', '363', '291']
['327', '303', '312']
['366', '303', '312']
['407', '414', '324', '309']