From c027a13f6ed82fd6150807304c57d52972e32f94 Mon Sep 17 00:00:00 2001
From: yi-ge <a@wyr.me>
Date: Fri, 8 May 2020 13:12:12 +0800
Subject: [PATCH] =?UTF-8?q?add:=20=E5=B7=A6=E6=97=8B=E8=BD=AC=E5=AD=97?=
 =?UTF-8?q?=E7=AC=A6=E4=B8=B2?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .vscode/settings.json                               | 9 ++++++++-
 README.md                                           | 4 ++++
 src/string/zuo-xuan-zhuan-zi-fu-chuan-lcof.js       | 8 ++++++++
 test/string/zuo-xuan-zhuan-zi-fu-chuan-lcof.test.js | 6 ++++++
 4 files changed, 26 insertions(+), 1 deletion(-)
 create mode 100644 src/string/zuo-xuan-zhuan-zi-fu-chuan-lcof.js
 create mode 100644 test/string/zuo-xuan-zhuan-zi-fu-chuan-lcof.test.js

diff --git a/.vscode/settings.json b/.vscode/settings.json
index 29cc9c7..7d8629b 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -1,11 +1,18 @@
 {
   "cSpell.words": [
+    "abcdefg",
+    "cdefgab",
+    "chuan",
     "dvdf",
     "lcci",
     "lcof",
+    "lrloseumgh",
     "mincost",
     "nums",
     "pwwkew",
-    "zhong"
+    "umghlrlose",
+    "xuan",
+    "zhong",
+    "zhuan"
   ]
 }
\ No newline at end of file
diff --git a/README.md b/README.md
index d62267f..2a0721b 100644
--- a/README.md
+++ b/README.md
@@ -67,6 +67,10 @@ LeetCode 与 LintCode 解题记录。此为个人练习仓库，代码中对重
 
   - 面试题参考思路，不严谨实现 廖雪峰 不要使用JavaScript内置的parseInt()函数，利用map和reduce操作实现一个string2int()函数。 https://www.liaoxuefeng.com/wiki/1022910821149312/1024322552460832
 
+- [左旋转字符串](src/string/zuo-xuan-zhuan-zi-fu-chuan-lcof.js)
+
+  - LeetCode 面试题58 - II. 左旋转字符串 https://leetcode-cn.com/problems/zuo-xuan-zhuan-zi-fu-chuan-lcof/
+
 ## 数组
 
 - [电话号码的字母组合](src/array/letter-combinations-of-a-phone-number.js)
diff --git a/src/string/zuo-xuan-zhuan-zi-fu-chuan-lcof.js b/src/string/zuo-xuan-zhuan-zi-fu-chuan-lcof.js
new file mode 100644
index 0000000..de51a37
--- /dev/null
+++ b/src/string/zuo-xuan-zhuan-zi-fu-chuan-lcof.js
@@ -0,0 +1,8 @@
+/**
+ * @param {string} s
+ * @param {number} n
+ * @return {string}
+ */
+export const reverseLeftWords = function (s, n) {
+  return (s + s).substr(n, s.length)
+}
diff --git a/test/string/zuo-xuan-zhuan-zi-fu-chuan-lcof.test.js b/test/string/zuo-xuan-zhuan-zi-fu-chuan-lcof.test.js
new file mode 100644
index 0000000..43c52de
--- /dev/null
+++ b/test/string/zuo-xuan-zhuan-zi-fu-chuan-lcof.test.js
@@ -0,0 +1,6 @@
+import { reverseLeftWords } from '../../src/string/zuo-xuan-zhuan-zi-fu-chuan-lcof'
+
+test('左旋转字符串', () => {
+  expect(reverseLeftWords('abcdefg', 2)).toBe('cdefgab')
+  expect(reverseLeftWords('lrloseumgh', 6)).toBe('umghlrlose')
+})