I'm probably missing something, but why not take a copy of $x before the loop and check if it has changed afterwards?
sub onTick {
our $x;
my $copyX = $x;
# Initialize and associate $x with some external value
foreach (@kabluther) {
$x += $_->getSkookiness();
}
if( $x != $copyX ) {
notifyWatchers( $x );
}
return $x;
}
That wouldn't detect serial changes that result in no change--$x += 10; $x += -4; $x += -6;--but whether that is a problem depends upon what the watchers are watching?
Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.
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