in reply to Solution.
in thread "Useless use of private variable in void context"

++ for letting us know the resolution.

On the comma thing. I have a habit of starting out with a lines like

$i++ if $some_condition; #or push @a, 'fred' while @a < 10;

And then realising that I need to do something else in the if or while and so instead of restructuring the line to the

if(..) { ....; ....; } or

while( ... ) { ...; ....; }

I do

$j-- , $i++ if $some_condition; #or print scalar @a , push @a, 'fred' while @a < 10;

This is usually a temporary step while I try something out or when debugging, but I've been bitten enough times by the "comma thing" to recognise the symtoms.

Examine what is said, not who speaks.
"Efficiency is intelligent laziness." -David Dunham
"When I'm working on a problem, I never think about beauty. I think only how to solve the problem. But when I have finished, if the solution is not beautiful, I know it is wrong." -Richard Buckminster Fuller