shuffle:
_::shuffle([1, 2, 3, 4, 5, 6]);
// => [4, 1, 6, 3, 5, 2]
sample:
_::sample([1, 2, 3, 4, 5, 6]);
// => 4
_::sample([1, 2, 3, 4, 5, 6], 3);
// => [1, 6, 2]
toArray:
$object = new stdClass();
$object->one = 1;
$object->two = 2;
$object->three = 3;
_::toArray($object);
// => ['one' => 1, 'two' => 2, 'three' => 3]
_::toArray(null);
// => []
_::toArray("hello");
// => ["hello"]
size:
$object = new stdClass();
$object->one = 1;
$object->two = 2;
$object->three = 3;
_::size($object);
// => 3
partition:
_::partition([0, 1, 2, 3, 4, 5], function ($num) {
    return $num % 2 != 0;
});
// => [[1, 3, 5], [0, 2, 4]]