.. which would otherwise do the wrong thing for a filename such as "0".
Umm, perhaps I'm being too picky, but I think that was a flawed example. 
defined($filename) && length($filename)

[download]
would evaluate correctly, regardless of the actual filename.

Now, if you tried just $filename as the return value, that would be problematic...

-QM
--
Quantum Mechanics: The dreams stuff is made of

In reply to Re^3: Converting to boolean by QM
in thread Converting to boolean by dragonchild

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