:)
perl -MData::Dumper -lwe 'my ( @x, @y, @z ) = ("z", "y", "z"); print D
+umper(\(@x,@y,@z))'
$VAR1 = [
'z',
'y',
'z'
];
$VAR2 = [];
$VAR3 = [];
my (%Aseen, %Bseen, %count, @isec, @diff, @union, @aonly);
They all are declared empty. No need to be explicit about it; and as the example above shows, that form of being explicit won't do what you might think anyway.
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