sub sort { 
    sort { ($a <=> $b) or 
           ($a cmp $b) } @_ 
}

@a=qw( 1 12 11 102 ddd abc cba 1c 1a ); 
@a = &sort (@a); 
print "@a\n";

Output: abc cba ddd 1 1a 1c 11 12 102