/**
* Sorting method used for sorting numbers
*
* @param number $a
* @param number $b
* @return int
*/
public function numberSort($a, $b)
{
$valA = $a->getColumn($this->columnToSort);
$valB = $b->getColumn($this->columnToSort);
if ($valA === false) {
$valA = null;
}
if ($valB === false) {
$valB = null;
}
return !isset($valA) && !isset($valB) ? 0 : (!isset($valA) ? 1 : (!isset($valB) ? -1 : ($valA != $valB || !isset($a->c[Row::COLUMNS]['label']) ? $this->sign * ($valA < $valB ? -1 : 1) : -1 * $this->sign * strnatcasecmp($a->c[Row::COLUMNS]['label'], $b->c[Row::COLUMNS]['label']))));
}
