diff --git a/src/ArrayClasses/IArrayClass.php b/src/ArrayClasses/IArrayClass.php
index 2e698e6..d38b7a4 100644
--- a/src/ArrayClasses/IArrayClass.php
+++ b/src/ArrayClasses/IArrayClass.php
@@ -17,6 +17,14 @@ interface IArrayClass extends IImmutableArrayClass {
      * @return $this
      */
     public function set ($cellName, $cellValue): self;
+    /**
+     * Add a cell (at the end)
+     *
+     * @param mixed $cellValue The cell new value
+     *
+     * @return $this
+     */
+    public function push ($cellValue): self;
     /**
      * Remove a cell
      *
diff --git a/src/ArrayClasses/TInternalArray.php b/src/ArrayClasses/TInternalArray.php
index a3a4036..f136d31 100644
--- a/src/ArrayClasses/TInternalArray.php
+++ b/src/ArrayClasses/TInternalArray.php
@@ -6,24 +6,20 @@ use OutOfRangeException;
 
 trait TInternalArray {
     /**
-     * Create or replace a cell value
-     *
-     * @param mixed $cellName  The cell name/offset
-     * @param mixed $cellValue The cell new value
-     *
-     * @return $this
+     * @inheritDoc
      */
     public function set ($cellName, $cellValue): self {
         $this->array[$cellName] = $cellValue;
         return $this;
     }
     /**
-     * Remove a cell
-     *
-     * @param mixed     $cellName                    The cell name/offset
-     * @param bool|null $throwsForNonExistentElement If set, temporarily override {@see ImmutableArrayClass::$throwsForNonExistentElement}
-     *
-     * @return $this
+     * @inheritDoc
+     */
+    public function push ($cellValue): self {
+        return $this->set($this->count(), $cellValue);
+    }
+    /**
+     * @inheritDoc
      */
     public function del ($cellName, ?bool $throwsForNonExistentElement = null): self {
         if ($throwsForNonExistentElement ?? $this->throwsForNonExistentElement() && !$this->has($cellName)) {