Of course, if you want to have some fun ...

#!/usr/local/bin/perl
use warnings;
use strict;
use Data::Dumper;
use Inline 'C';
                                                                      
+          
my @array = ('POST100','POST5','POST10','POST1');
                                                                      
+          
my @sorted =
    sort { $a <=> $b }
    map  { make_bimodal($_) }
        @array;
                                                                      
+          
print Dumper \@sorted;
                                                                      
+          
sub make_bimodal {
    my $val = shift;
    my $num = substr $val => 4;
    my $dual;
    set_both($dual, $val, $num+0);
    return $dual;
}
                                                                      
+          
__DATA__
__C__
                                                                      
+          
void set_both(SV* variable, SV* string, SV* numeric)
{
    SvPV(string, PL_na);
    if(!SvPOKp(string) || (!SvNOKp(numeric) && !SvIOKp(numeric)) )
    {
        croak("Usage: set_both variable,string,numeric");
    }
                                                                      
+          
    sv_setsv(variable,string);
    if(SvNOKp(numeric))
    {
       sv_setnv(variable,SvNV(numeric));
    }
    else
    {
         sv_setiv(variable,SvIV(numeric));
    }
    SvPOK_on(variable);
}
[download]

No, I'm not serious, but yes, it will work :)

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