Sorting a Doctrine ArrayCollection by a specific, custom field

I am attempting to sort an ArrayCollection by a specific field. The ArrayCollection is an array of courses. In the Course entity there is a method called isLive which returns a boolean.

I would like to sort this collection to have the "live" courses at the beginning of the array, so that's the courses that return true from a isLive call.

This is the code I have at present, but the first entry in the $sorted array is a non-live course.

$iterator = $this->courses->getIterator();
$iterator->uasort(function ($a, $b) {
   if ($a->isLive() == $b->isLive()) {
      return 0;
   }
   return ($a->isLive() < $b->isLive()) ? -1 : 1;
});
$sorted = new ArrayCollection(iterator_to_array($iterator));

I got to a solution with the use of uasort and array_search as below:

/**
 * @return ArrayCollection
 */
public function getCoursesSortedByLive(): ArrayCollection
{
    $coursesIterator = $this->courses->getIterator();

    $sortOrder = [true];

    $coursesIterator->uasort(function ($a, $b) use ($sortOrder) {
        return array_search($a->isLive(), $sortOrder) - array_search($b->isLive(), $sortOrder);
    });

    return new ArrayCollection(iterator_to_array($sitesIterator));
}