It's a little bit harder to answer when your example is thus simplified. It looks like you got your answer, anyway.

(I might've suggested:)

sub second {
  my $sum = 0;
  $sum += $_ for 6, @{+shift};
  $sum
}

[download]

In reply to Re^3: Preserve the value of original array by ayrnieu
in thread Preserve the value of original array by Anonymous Monk

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