feat: add whereInstanceOf

Author: Fureev Eugene

CHANGELOG.md

@@ -4,11 +4,17 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog][keepachangelog] and this project adheres to [Semantic Versioning][semver].
 
+## v4.21.0
+
+### Added
+
+- Add method `whereInstanceOf` into `ArrayCollection`
+
 ## v4.20.0
 
 ### Added
 
-- Add method `slugifyWithFormat` into Str
+- Add method `slugifyWithFormat` into `Str`
 
 ## v4.19.0
 

src/Structures/Collections/ArrayCollection.php

@@ -287,6 +287,21 @@ public function filter(Closure $func = null): static
         return $this->createFrom(array_filter($this->elements, $func, ARRAY_FILTER_USE_BOTH));
     }
 
+    public function whereInstanceOf(string|array $type): static
+    {
+        return $this->filter(
+            static function ($value) use ($type) {
+                foreach ((array)$type as $classType) {
+                    if ($value instanceof $classType) {
+                        return true;
+                    }
+                }
+
+                return false;
+            }
+        );
+    }
+
     /**
      * {@inheritDoc}
      *