public function __construct(array $dataArray, $page = 1, $pagenum = 10)
{
if ($page == null) {
$page = 1;
}
if ($pagenum == null) {
$pagenum = 10;
}
$this->perPage = $pagenum;
$this->currentPage = $page;
$this->dataArray = $dataArray;
$this->calculate();
}