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$bar1 = Bar->new();
$bar2 = Bar->new();
$bar1->foo(); # returns 1, as you would expect
$bar1->foo(); # returns 2, as you would expect
$bar2->foo(); # returns 3, possibly unexpected
By rote learning.
Via Genetic memory.
It's provided by my firmware.
I just remember them.
Thirty days hath September
My computer gets it right, usually.
I just ask someone else.
Someone punches me on the first of the month.
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