You can't have filenames longer than 14 chars. You can't even think about them!
Now, I'm not the only language designer with irrationalities. You can think of some languages to go with some of these things.
Perl is designed to give you several ways to do anything, so consider picking the most readable one.
I'm a great believer in visual distinctions.
You want it in one line? Does it have to fit in 80 columns?
One operator is no big deal. That can be fixed in a jiffy.