Checking if a string is null

[Manfred Nowak]

Frits van Bommel wrote

> There's just some disagreement 
> on what should be considered an "empty string"

If your secretary opens an envelope adressed to you, but the envelope 
has not a single sheet of paper in it: what would you expect your 
secretry to do?
 
1) forward that envelope unmodified to you

2) as above, but fill the envelope with an empty sheet of paper first

3) something completely different


After solving this for yourself, what would you do in the above case if 
you are my secretary?

-manfred