my $iter = sub {
my ($data, $div) = @_;
$div->set_child_content(class => 'value', $data->{value});
$div->set_child_content(class => 'solution', literal $data->{solution});
$div->fclass('problem')->namedlink($data->{id}, $data->{name});
};
my $iter = sub {
my ($data, $div) = @_;
$div->set_child_content(class => 'value', $data->{value});
$div->set_child_content(class => 'solution', literal $data->{solution});
$div->fclass('problem')->namedlink($data->{id}, $data->{name});
};