i'm not sure how the database for Perl Monks is set up, but
i suspect that this is not a simple addition. unless every
node stores the id of its top-level parent node (in addition
to the id of its immediate parent), then multiple SQL
queries would need to be made to traverse the tree of
children and get a reply count.
this could be entirely incorrect, but i suspect vroom
would have added this feature if it weren't near impossible
to do easily in SQL.
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