http://www.perlmonks.org?node_id=521402


in reply to Re^2: Obtaining terms in an expansion
in thread Obtaining terms in an expansion

my $prod = 1; # multiplicative identity, of course

for ( @a )
{
    my($x,$y) = @$_;
    $prod *= $x + $y;
}

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That does what you describe, but it's not 2^N. Not sure where the discrepancy lies...

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