var strReversed = str.split('').reverse().join(''); function: function reverse(str){ return str.split('').reverse().join(''); }…

344. Reverse String /** * @param {string} s * @return {string} */ var reverseString = function(s) { return s.split("").reverse().join(""); }; 292. Nim Game 尼姆游戏还是很有意思的,这题有很多地方可以深入理解 /** * @param {number} n * @return {boolean} */ var ca…

Write a function that takes a string as input and returns the string reversed. Example: Given s = "hello", return "olleh". 这道题没什么难度,直接从两头往中间走,同时交换两边的字符即可,参见代码如下: 解法一: class Solution { public: string reverseString(string s) { , right =…

原题链接在这里:https://leetcode.com/problems/reverse-string/ 题目: Write a function that takes a string as input and returns the string reversed. Example:Given s = "hello", return "olleh". 题解: Reverse string是常见题, string在Java中是primitive类型, 一旦生成不…

下面是今天写的几道题: 292. Nim Game You are playing the following Nim Game with your friend: There is a heap of stones on the table, each time one of you take turns to remove 1 to 3 stones. The one who removes the last stone will be the winner. You will take t…

1.2 Implement a function void reverse(char *str) in C or C++ which reverses a null-terminated string. 这道题让我们用C++或C语言来翻转一个字符串,不算一道难题,在之前那道Reverse Words in a String 翻转字符串中的单词中用到了这个函数,跟那道题比起来,这题算简单的了.C语言的版本要比C++的稍微复杂一些,应为string类集成了很多有用的功能,比如得到字符串的长度,用下标…

344. Reverse String Write a function that takes a string as input and returns the string reversed. Example: Given s = "hello", return "olleh". 题目大意: 字符串倒置. 解题方法: 第一个字符与最后一个非空字符对换. 注意事项: 1.字符串最后一个字符是空字符. C++代码: 1.不良代码: class Solution {…

正则表达式由来已久,查找替换功能非常强大,但模板难记复杂. JavaScript中String对象的match().replace()这2个方法都要使用正则表达式的模板.当模板内容与字符串不相匹配时,match()返回null,replace()返回原字符串. 正则表达式的模板对象 //标准写法 regexp = new RegExp(pattern[, flag]); pattern: 模板的用法是关键,也是本章的主要内容. flag: "i"(ignore)."g&quo…

原题地址: 344 Reverse String: https://leetcode.com/problems/reverse-string/description/ 541 Reverse String II: https://leetcode.com/problems/reverse-string-ii/description/ 题目&&解法: 1.Reverse String: Write a function that takes a string as input and ret…

Given a string and an integer k, you need to reverse the first k characters for every 2k characters counting from the start of the string. If there are less than k characters left, reverse all of them. If there are less than 2k but greater than or eq…

题目描述 编写一个函数,其作用是将输入的字符串反转过来. 示例 1: 输入: "hello" 输出: "olleh" 示例 2: 输入: "A man, a plan, a canal: Panama" 输出: "amanaP :lanac a ,nalp a ,nam A" 思路 思路一: 逆序拼接字符串 思路二: 依次交换两边的值 思路三: 直接调用StringBuilder 的 reverse() 思路四: 用栈来实现反…

344. Reverse String 最基础的旋转字符串 class Solution { public: void reverseString(vector<char>& s) { if(s.empty()) return; ; ; while(start < end){ char tmp = s[end]; s[end] = s[start]; s[start] = tmp; start++; end--; } return; } }; 541. Reverse Strin…

JavaScript中String类型用于表示由零个或者多个16位Unicode字符组成的字符序列即字符串:同时字符串可以用单引号或双引号表示. 下面是一些特殊的字面量: 字面量 含义\n 换行\t 制表\b 退格\r 回车\f 进纸\\ 斜杠\' 单引号\" 双引号\xnn 以十六进制代码nn表示的一个字符(其中n为0~F).例如,\x41表示“A”unnnn 以十六进制代码nnnn表示的一个UNcode字符(其中n为0~F).例如,\u03a3表示希腊字符Εε 字符串特点: 字符串是不可变的…

problem 344. Reverse String solution: class Solution { public: void reverseString(vector<char>& s) { vector<'); ; i>=; i--) { temp[i] = s[s.size()-i-]; } ; i<s.size(); i++) { s[i] = temp[i]; } } }; solution2: class Solution { public: vo…

package leadcode; /** * 541. Reverse String II * Easy * 199 * 575 * * * Given a string and an integer k, you need to reverse the first k characters for every 2k characters counting from the start of the string. If there are less than k characters lef…

［抄题］: [暴力解法]: 时间分析: 空间分析: ［奇葩输出条件］: ［奇葩corner case］: ［思维问题］: 还停留在 i < len / 2的阶段,不行,应该是指针对撞问题了 ［一句话思路］: 先要把字符串转成数组,再转回来,数据结构白学了? ［输入量］:空: 正常情况:特大:特小:程序里处理到的特殊情况:异常情况(不合法不合理的输入): ［画图］: ［一刷］: 用.tochararray转成字符串数组,顾名思义了 ［二刷］: ［三刷］: ［四刷］: ［五刷］: [五分钟肉眼deb…

LeetCode--Reverse String Question Write a function that takes a string as input and returns the string reversed. Example: Given s = "hello", return "olleh". Answer class Solution { public: string reverseString(string s) { string str(s.…

344. Reverse String[easy] Write a function that takes a string as input and returns the string reversed. Example:Given s = "hello", return "olleh". 解法一: class Solution { public: string reverseString(string s) { , end = s.length() - ; w…

原题链接在这里:https://leetcode.com/problems/reverse-string-ii/#/description 题目: Given a string and an integer k, you need to reverse the first k characters for every 2k characters counting from the start of the string. If there are less than k characters l…

本文翻译youtube上的up主kudvenkat的javascript tutorial播放单 源地址在此: https://www.youtube.com/watch?v=PMsVM7rjupU&list=PL6n9fhu94yhUA99nOsJkKXBqokT3MBK0b 本次视频我们会讨论在Javascript中将string转化成numbers的各种不同方法. 以下的例子允许用户输入两个数字并且相加.同时我们会学到以下函数 1.parseInt() 2.parseFloat() 3.i…

Given a string and an integer k, you need to reverse the first k characters for every 2k characters counting from the start of the string. If there are less than k characters left, reverse all of them. If there are less than 2k but greater than or eq…

在javascript里怎么样才能把int型转换成string型 (1) var num = 0;    a = x.toString();    (2) var x = 0;    a = x + "";     //JS会自动隐性转换   javascript  将string 变成 int (1) var s = "32"  var i = new Number(s) (2)  parseInt("aaa") // return NaN. …

Write a function that reverses a string. The input string is given as an array of characters char[]. Do not allocate extra space for another array, you must do this by modifying the input array in-place with O(1) extra memory. You may assume all the…

Leetcode 344:Reverse String 反转字符串 公众号:爱写bug Write a function that reverses a string. The input string is given as an array of characters char[]. Do not allocate extra space for another array, you must do this by modifying the input array in-place wit…

541. 反转字符串 II 541. Reverse String II…

344. Reverse String Easy Write a function that reverses a string. The input string is given as an array of characters char[]. Do not allocate extra space for another array, you must do this by modifying the input array in-place with O(1) extra memory…

problem 541. Reverse String II 题意: 给定一个字符串,每隔k个字符翻转这k个字符,剩余的小于k个则全部翻转,否则还是只翻转剩余的前k个字符. solution1: class Solution { public: string reverseStr(string s, int k) { int n = s.size(); int cnt = n / k; ; i<=cnt; i++) { ==) { if(i*k+k<n) reverse(s.begin()+i…

string和array作为javascript内置对象,其中许多方法无论是在开发过程中,还是在面试的时候都有机会被面试官问到,这里对经常用到的方法做一个介绍,这些方法都有过很多的实际应用场景,所以对它们的掌握还是非常有必要的. 1.Array数组常用方法? 先创建一个数组var abc = [1,2,3,4,5,6,7,8,9]; (1)pop(); 这个方法会删除数组的最后一项并返回删除掉的值. 比如:console.log(abc.pop());//9;    console.log(ab…

<script src="Js/jquery-3.1.1.min.js"></script> <script type="text/javascript"> /* * 格式化金额 个位起每三位逗号分隔 10,000.00 * @param n 小数位 * @return */ String.prototype.toThousands = function (n) { var n = n > 0 && n &l…

1.字符方法 1.1 charAt() 方法,返回字符串中指定位置的字符. var question = "Do you like JavaScript?"; alert(question.charAt(5)); //"u" 字符串 "Do you like JavaScript?" 的长度为23,即位置从0到22.指定位置5处的字符是"u". 1.2 charCodeAt() 方法,返回字符串中指定位置的字符编码. var…