in reply to Flipper

for the simple on/off case, you can also use XOR: 
my @Toggles = qw(on off);

$Toggles[$flip^=1];

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RE(2): Flipper
by Russ (Deacon) on May 20, 2000 at 06:58 UTC
    Ooooooh. Very nice! Hadn't seen that.
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In Section Cool Uses for Perl