From c4de753d6db1548205de14efdb4fc9194d7223c4 Mon Sep 17 00:00:00 2001
From: phoenix <xiaobin.phoenix@gmail.com>
Date: Sat, 29 May 2021 08:07:50 +0800
Subject: [PATCH 1/2] =?UTF-8?q?=E6=B7=BB=E5=8A=A0=200020.=E6=9C=89?=
 =?UTF-8?q?=E6=95=88=E7=9A=84=E6=8B=AC=E5=8F=B7=20Ruby=20=E7=89=88?=
 =?UTF-8?q?=E6=9C=AC?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 problems/0015.三数之和.md | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/problems/0015.三数之和.md b/problems/0015.三数之和.md
index 811fc316..4f4ec63a 100644
--- a/problems/0015.三数之和.md
+++ b/problems/0015.三数之和.md
@@ -336,6 +336,23 @@ var threeSum = function(nums) {
 ```
 
 
+ruby:
+```ruby
+def is_valid(strs)
+    symbol_map = {')' => '(', '}' => '{', ']' => '['}
+    stack = []
+    strs.size.times {|i|
+        c = strs[i]
+        if symbol_map.has_key?(c)
+            top_e = stack.shift
+            return false if symbol_map[c] != top_e
+        else
+            stack.unshift(c)
+        end
+    }
+    stack.empty?
+end
+```
 
 -----------------------
 * 作者微信：[程序员Carl](https://mp.weixin.qq.com/s/b66DFkOp8OOxdZC_xLZxfw)

From bd95f6a248f9175216582225500e3c074f0c4180 Mon Sep 17 00:00:00 2001
From: phoenix <xiaobin.phoenix@gmail.com>
Date: Sat, 29 May 2021 09:12:26 +0800
Subject: [PATCH 2/2] =?UTF-8?q?=E6=B7=BB=E5=8A=A0=200027.=E7=A7=BB?=
 =?UTF-8?q?=E9=99=A4=E5=85=83=E7=B4=A0=20Ruby=20=E7=89=88=E6=9C=AC?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 problems/0027.移除元素.md | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/problems/0027.移除元素.md b/problems/0027.移除元素.md
index 8da0fb89..f0f61d06 100644
--- a/problems/0027.移除元素.md
+++ b/problems/0027.移除元素.md
@@ -186,6 +186,20 @@ var removeElement = (nums, val) => {
 };
 ```
 
+Ruby:
+```ruby
+def remove_element(nums, val)
+    i = 0
+    nums.each_index do |j| 
+        if nums[j] != val
+            nums[i] = nums[j]
+            i+=1
+        end
+    end
+    i
+end
+```
+
 -----------------------
 * 作者微信：[程序员Carl](https://mp.weixin.qq.com/s/b66DFkOp8OOxdZC_xLZxfw)
 * B站视频：[代码随想录](https://space.bilibili.com/525438321)