public function indexTables($a, $b, $hdr)
{
$this->ia->indexTable($a, $hdr);
$this->ib->indexTable($b, $hdr);
$this->hdr = $hdr;
$good = 0;
if (null == $this->ia->items) {
throw new HException('null iterable');
}
$__hx__it = $this->ia->items->keys();
while ($__hx__it->hasNext()) {
unset($key);
$key = $__hx__it->next();
$item_a = $this->ia->items->get($key);
$spot_a = $item_a->lst->length;
$item_b = $this->ib->items->get($key);
$spot_b = 0;
if ($item_b !== null) {
$spot_b = $item_b->lst->length;
}
if ($spot_a === 1 && $spot_b === 1) {
$good++;
}
unset($spot_b, $spot_a, $item_b, $item_a);
}
$this->quality = $good / Math::max(1.0, $a->get_height());
}
