Change average() to use its parameters, not the top-level @array directly; then you can limit @array to the appropriate context:

sub average {
    if (@_) {
        my @temp = @_;
        my $sum = 0;
        foreach (@temp) {
            $sum = $sum + $_;
        }
        return $sum/@temp;
    }
}

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edit: fixed indenting for readability

In reply to Re: resetting a foreach loop! by pryrt
in thread resetting a foreach loop! by lunette

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