Merge pull request #2570 from Monster-XU-jesus/master

更新 0055.右旋字符串.md JavaScript代码

problems/kamacoder/0055.右旋字符串.md

@@ -300,33 +300,50 @@ int main()
 ```javascript
 // JS中字符串内不可单独修改
 
-// 右旋转
+const readline = require('readline')
-function reverseLeftWords(s, k) {
+
-  const reverse = (sList, start, end) => {
+const rl = readline.createInterface({
-    for (let i = start, j = end; i < j; i++, j--) {
+    input: process.stdin,
-      [sList[i], sList[j]] = [sList[j], sList[i]];
+    output: process.stdout
-    }
+})
-  }
+
-  const sList = Array.from(s);
+const inputs = []; // 存储输入
-  reverse(sList, 0, sList.length - k - 1);
+
-  reverse(sList, sList.length - k, sList.length - 1);
+rl.on('line', function(data) {
-  reverse(sList, 0, sList.length - 1);
+    inputs.push(data);
-  return sList.join('');
+
+}).on('close', function() {
+    const res = deal(inputs);
+    // 打印结果
+    console.log(res);
+})
+
+// 对传入的数据进行处理
+function deal(inputs) {
+    let [k, s] = inputs;
+    const len = s.length - 1;
+    k = parseInt(k);
+    str = s.split('');
+    
+    str = reverseStr(str, 0, len - k)
+    str = reverseStr(str, len - k + 1, len)
+    str = reverseStr(str, 0, len)
+
+    return str.join('');
 }
 
-// 左旋转
+// 根据提供的范围进行翻转
-var reverseLeftWords = function(s, n) {
+function reverseStr(s, start, end) {
-  const reverse = (sList, start, end) => {
+    
-    for (let i = start, j = end; i < j; i++, j--) {
+    while (start < end) {
-      [sList[i], sList[j]] = [sList[j], sList[i]];
+        [s[start], s[end]] = [s[end], s[start]]
+        
+        start++;
+        end--;
     }
-  }
+
-  const sList = s.split('');
+    return s;
-  reverse(sList, 0, n - 1);
+}
-  reverse(sList, n, sList.length - 1);
-  reverse(sList, 0, sList.length - 1);
-  return sList.join('');
-};
 ```
 
 ### TypeScript：