filtering function for collections of objects for twig

gistfile1.php

use Doctrine\Common\Collections\Collection;
use Symfony\Component\PropertyAccess\PropertyAccess;


    public function getFilters()
    {
        return array(
            'sortCollection' => new \Twig_Filter_Method($this, 'sortCollection'),
        );
    }

    public function sortCollection(Collection $collection, $column, $direction = 'ASC')
    {
        $iterator = $collection->getIterator();
        $accessor = PropertyAccess::createPropertyAccessor();
        $iterator->uasort(function ($first, $second) use ($accessor, $column, $direction) {
            if ($direction == 'ASC') {
                return ((int)$accessor->getValue($first, $column) > (int)$accessor->getValue($second, $column) ? 1 : -1);
            } else {
                return ((int)$accessor->getValue($first, $column) < (int)$accessor->getValue($second, $column) ? 1 : -1);
            }
        });

        return $iterator;
    }