All tests are done and passing.

.phpunit.result.cache

@@ -1 +1 @@
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README.md

@@ -5,7 +5,7 @@ A versatile, fully-featured Linear [Collection](https://en.wikipedia.org/wiki/Co
 ## Installation
 
 ```bash
-composer require galvao-eti/collection:0.3.0-alpha
+composer require galvao-eti/collection
 ```
 
 ## Features
@@ -21,11 +21,11 @@ Strongly Typed Collections:
 - [x] Array
 - [x] Object
 - [x] Objects of a specific class
-- [ ] Customizable overwriting prevention
-- [ ] Locking the collection (no more writing to it)
-- [ ] Deletion
-- [ ] Automatically rearranging the collection's keys upon deletion
-- [ ] Update items
+- [x] Overwriting prevention when adding data with existing key or updating
+- [x] Locking the collection (no more writing to it)
+- [x] Deletion
+- [x] Automatically rearranging the collection's keys upon deletion
+- [x] Update items
 
 ## Usage
 

bin/useCollection.php

@@ -22,6 +22,8 @@
     echo $e->getMessage();
 }
 
+var_dump($c->get(null));
+
 try {
     $c->delete(1, true);
 } catch (Throwable $e) {
@@ -31,3 +33,6 @@
 foreach ($c->generateData() as $item) {
     echo $item . PHP_EOL;
 }
+
+var_dump($c->get(null));
+echo $c->key();

composer.json

@@ -2,7 +2,7 @@
     "name": "galvao-eti/collection",
     "type": "library",
     "license": "Apache-2.0",
-    "description": "A versatile, fully-featured Collection implementation.",
+    "description": "A versatile, fully-featured Linear Collection implementation.",
     "autoload": {
         "psr-4": {
             "GalvaoEti\\Collection\\": "src/"

src/Abstraction/CollectionInterface.php

@@ -19,6 +19,7 @@
 interface CollectionInterface extends \Iterator
 {
     public function __construct(string $dataType = 'mixed', ?string $dataClass = null);
+    public function validateTypes(mixed $data): bool;
     public function add(mixed $data, bool $lazy = true): void;
     public function get(?int $key): mixed;
     public function update(int $key, mixed $data, bool $silentOnNotFound = true): void;