From 4c397b64f5f4aba97f9d9034182b83bd8a062db6 Mon Sep 17 00:00:00 2001
From: Lane Zhang <zjloveztt@gmail.com>
Date: Mon, 4 Nov 2024 12:07:27 +0800
Subject: [PATCH] =?UTF-8?q?0450.=E5=88=A0=E9=99=A4=E4=BA=8C=E5=8F=89?=
 =?UTF-8?q?=E6=90=9C=E7=B4=A2=E6=A0=91=E4=B8=AD=E7=9A=84=E8=8A=82=E7=82=B9?=
 =?UTF-8?q?=20=E5=8A=A0=E5=85=A5Ruby=E9=80=92=E5=BD=92=E5=AE=9E=E7=8E=B0?=
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---
 .../0450.删除二叉搜索树中的节点.md | 34 +++++++++++++++++++
 1 file changed, 34 insertions(+)

diff --git a/problems/0450.删除二叉搜索树中的节点.md b/problems/0450.删除二叉搜索树中的节点.md
index f6057f44..7523c50a 100644
--- a/problems/0450.删除二叉搜索树中的节点.md
+++ b/problems/0450.删除二叉搜索树中的节点.md
@@ -801,6 +801,40 @@ impl Solution {
     }
 ```
 
+### Ruby
+> 递归法：
+```ruby
+# @param {TreeNode} root
+# @param {Integer} key
+# @return {TreeNode}
+def delete_node(root, key)
+    return nil if root.nil?
+
+    right = root.right
+    left = root.left
+
+    if root.val == key
+        return right if left.nil?
+        return left if right.nil?
+
+        node = right
+        while node.left
+            node = node.left
+        end
+        node.left = left
+
+        return right
+    end
+
+    if root.val > key
+        root.left = delete_node(left, key)
+    else
+        root.right = delete_node(right, key)
+    end
+
+    return root
+end
+```
 
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