static function checkNegaPosi($from, $to)
{
if ($from === "" || $to === "") {
return false;
}
$chunks = Chunk::all();
$result = null;
foreach ($chunks as $chunk) {
$_from = $chunk['from'];
$_to = $chunk['to'];
if (preg_match("/{$_from}/u", $from) && preg_match("/{$_to}/u", $to)) {
$result = trim($chunk['nega_posi']);
break;
}
}
if ($result == null || $result == "non") {
$result = "f";
}
return $result;
}