build

docs/chapter_tree/array_representation_of_tree.md

@@ -123,6 +123,14 @@ comments: true
 === "Kotlin"
 
     ```kotlin title=""
+    /* 二叉树的数组表示 */
+    // 使用 null 来表示空位
+    val tree = mutableListOf( 1, 2, 3, 4, null, 6, 7, 8, 9, null, null, 12, null, null, 15 )
+    ```
+
+=== "Ruby"
+
+    ```ruby title=""
 
     ```
 
@@ -1240,6 +1248,12 @@ comments: true
     }
     ```
 
+=== "Ruby"
+
+    ```ruby title="array_binary_tree.rb"
+    [class]{ArrayBinaryTree}-[func]{}
+    ```
+
 === "Zig"
 
     ```zig title="array_binary_tree.zig"