/**
* @param array|Phinq|Iterator|IteratorAggregate $collection The initial collection to query on
*/
protected function __construct($collection, array $queries = array())
{
$this->collection = Util::convertToNumericallyIndexedArray($collection);
$this->evaluatedCollection = $this->collection;
if (!empty($queries)) {
foreach ($queries as $query) {
$this->addToQueue($query);
}
}
}
/**
* @link http://www.php.net/manual/en/function.array-multisort.php#90917
* @return Closure
*/
public function getSortingCallback()
{
//need to perform a multisort using callbacks... which PHP can't do natively
$previousCallback = $this->previousQuery->getSortingCallback();
$currentCallback = Util::getDefaultSortCallback($this->getLambdaExpression(), $this->isDescending());
return function ($a, $b) use($previousCallback, $currentCallback) {
$previousValue = $previousCallback($a, $b);
if ($previousValue !== 0) {
return $previousValue;
}
return $currentCallback($a, $b);
};
}
public function getSortingCallback()
{
$lambda = $this->getLambdaExpression();
return Util::getDefaultSortCallback($lambda, $this->isDescending());
}