Change to: for ( 0..$#weights )

Alternatively do away with all that tedious messing around with indices completely :-)

use List::Util qw( sum );
use List::MoreUtils qw( pairwise );
my $sum = sum pairwise { $a * $b } @weights, @digits;

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In reply to Re^2: A better way than || by adrianh
in thread A better way than || by Anonymous Monk

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