Or more beautiful this way: 
use List::Util qw(sum);
...
for my $href ( @set ) {
    $totals[ $_ ] += sum @{ $href->{items} }
}
...

[download]
It makes operations on deeply nested structures a bit more readable.

In reply to Re^2: performing a function on corresonding array elements by codeacrobat
in thread performing a function on corresonding array elements by vindaloo

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