my $id = $_->id;
+{ $_->get_columns,
solved => ($solved{$id} // 0),
attempted => ($attempted{$id} // 0),
contests => ($contests{$id} // 0) }
my $id = $_->id;
+{ $_->get_columns,
solved => ($solved{$id} // 0),
attempted => ($attempted{$id} // 0),
contests => ($contests{$id} // 0) }