There are four derefences in
@{$people->{login}->{desk}->{paperclips}}
but only three arrows.
The rest of your post doesn't relate to what I said, so I have no comment on it save that I rarely have paths that long.
for my $employee (@$employees) {
for my $desk (@{ $employee->{desks} }) {
$paperclips += $desk->{paperclips};
}
}
Four dereferences, but only two arrows. And the output of your script doesn't illustrate the structure at all. Data::Dumper will do that to some extent.
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