From 45e996805b4ce94676abb1d5a2e43098403a6a6c Mon Sep 17 00:00:00 2001
From: SwordsmanYao <swordsman.yao@foxmail.com>
Date: Tue, 27 Jul 2021 16:44:04 +0800
Subject: [PATCH] =?UTF-8?q?[=E5=89=91=E6=8C=87Offer58-II.=E5=B7=A6?=
 =?UTF-8?q?=E6=97=8B=E8=BD=AC=E5=AD=97=E7=AC=A6=E4=B8=B2]=20=E6=B7=BB?=
 =?UTF-8?q?=E5=8A=A0js=E7=89=88=E6=9C=AC=E4=BB=A3=E7=A0=81?=
MIME-Version: 1.0
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---
 .../剑指Offer58-II.左旋转字符串.md    | 31 +++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/problems/剑指Offer58-II.左旋转字符串.md b/problems/剑指Offer58-II.左旋转字符串.md
index 3c3eaef0..8a60252c 100644
--- a/problems/剑指Offer58-II.左旋转字符串.md
+++ b/problems/剑指Offer58-II.左旋转字符串.md
@@ -165,6 +165,37 @@ func reverse(b []byte, left, right int){
 ```
 
 
+javaScript:
+
+```js
+/**
+ * @param {string} s
+ * @param {number} n
+ * @return {string}
+ */
+ var reverseLeftWords = function(s, n) {
+  const strArr = Array.from(s);
+  reverse(strArr, 0, n - 1);
+  reverse(strArr, n, strArr.length - 1);
+  reverse(strArr, 0, strArr.length - 1);
+  return strArr.join('');
+};
+
+// 翻转从 start 到 end 的字符
+function reverse(strArr, start, end) {
+  let left = start;
+  let right = end;
+
+  while(left < right) {
+    // 交换
+    [strArr[left], strArr[right]] = [strArr[right], strArr[left]];
+    left++;
+    right--;
+  }
+}
+```
+
+