- Some small bugfixes done

src/EntityCollection.php

@@ -49,6 +49,11 @@ class EntityCollection extends \ArrayObject {
         return $this->filtersCollection($callback, true, false)->toArray();
     }
 
+    public function filtersCount(Callable $callback) : array
+    {
+        return $this->filtersCollection($callback, true, false)->count();
+    }
+
     public function filtersOne(Callable $callback) : ? object
     {
         foreach($this->filters($callback, true) as $item) {
@@ -209,7 +214,7 @@ class EntityCollection extends \ArrayObject {
         return $list;
     }
 
-    public function unique(/*stringable|callable */ $field, bool $strict = false) : self
+    public function unique(\Stringable|callable $field, bool $strict = false) : self
     {
         $list = [];
         $obj = new static();
@@ -390,14 +395,16 @@ class EntityCollection extends \ArrayObject {
         return $this;
     }
 
-    public function sort(callable $callback, $function = "uasort") : self
+    public function sort(null|callable $callback = null, $function = "uasort") : self
     {
+        $callback ??= fn($e1, $e2) => $e1 <=> $e2;
+
         call_user_func_array([ $this, $function ], [ $callback ]);
 
         return $this;
     }
 
-    public function rsort(callable $callback, $function = "uasort") : self
+    public function rsort(null|callable $callback = null, $function = "uasort") : self
     {
         return $this->sort(...func_get_args())->reverse();
     }