Given a string, find the first non-repeating character in it and return it's index. If it doesn't exist, return -1.

Examples:

s = "leetcode"
return 0.
 
s = "loveleetcode",
return 2.

Note: You may assume the string contain only lowercase letters.

思路：找出第一个只出现一次的字母。利用字符索引，先遍历一遍数组统计，然后再遍历一次找出第一个索引值为1 的索引便是。

18. leetcode 387. First Unique Character in a String的更多相关文章

  1. LeetCode 387. First Unique Character in a String (字符串中的第一个唯一字符)

    题目标签:String, HashMap 题目给了我们一个 string,让我们找出 第一个 唯一的 char. 设立一个 hashmap,把 char 当作 key,char 的index 当作va ...

  2. LeetCode 387. First Unique Character in a String

    Problem: Given a string, find the first non-repeating character in it and return it's index. If it d ...

  3. [leetcode]387. First Unique Character in a String第一个不重复字母

    Given a string, find the first non-repeating character in it and return it's index. If it doesn't ex ...

  4. Java [Leetcode 387]First Unique Character in a String

    题目描述: Given a string, find the first non-repeating character in it and return it's index. If it does ...

  5. [LeetCode] 387. First Unique Character in a String 字符串的第一个唯一字符

    Given a string, find the first non-repeating character in it and return it's index. If it doesn't ex ...

  6. leetcode修炼之路——387. First Unique Character in a String

    最近公司搬家了,有两天没写了,今天闲下来了,继续开始算法之路. leetcode的题目如下: Given a string, find the first non-repeating characte ...

  7. [LeetCode&Python] Problem 387. First Unique Character in a String

    Given a string, find the first non-repeating character in it and return it's index. If it doesn't ex ...

  8. *387. First Unique Character in a String (linkedhashmap + string) debug manunally instead of using leetcode

    The ability to debug and overall thinking need to improve Given a string, find the first non-repeati ...

  9. 【LeetCode】387. First Unique Character in a String

    Difficulty:easy  More:[目录]LeetCode Java实现 Description https://leetcode.com/problems/first-unique-cha ...

随机推荐

  1. CC2530入门教程-02】CC2530的通用I/O端口输入和输出控制

    第2课  CC2530的通用I/O端口输入和输出控制 广东职业技术学院  欧浩源 一.CC2530的引脚概述 CC2530微控制器采用QFN40封装,有40 个引脚.其中,有21个数字I/O端口,其中 ...

  2. centOS6.4安装python3.5，并且安装pip

    前言: 如果你也是用的centos系统,打算装python3.0以上版本,再装python下载工具pip,那么恭喜你,你可能也会像我一样遇到各种各样的问题! 另外非常重要的一点:centos都会自带p ...

  3. 【WPF】DispatcherFrame 是个啥玩意儿

    对于 WPF 的线程模型,Dispatcher 对象相信各位大伙伴已经不陌生,尤其是跨线程更新UI的时候,都会用它来调度消息.与 Dispatcher 对象有关的,还有一个叫 DispatcherFr ...

  4. request.getParameter()及解决数据库中文乱码问题——实习第七天

    今天老师让我们自己做一个小项目,我开始着手于实现这个小项目.途中遇到过几个小问题,在此做个小记录, 相信后期还是会借鉴的. 1,从前台传入数据给后台传入数据,并没有传入成功: 输出的为Null. 当然 ...

  5. 闭包中this指向window的原因

    var t={ b:1, w:function a(){ var b=2; alert(this.b); //弹出t对象的b属性 alert(b); //弹出a函数的b变量 return functi ...

  6. [leetcode-495-Teemo Attacking]

    In LLP world, there is a hero called Teemo and his attacking can make his enemy Ashe be in poisoned ...

  7. Example016实现下拉框

    <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8&quo ...

  8. 弹出浮层css+JQuery

    先来张效果图: HTML代码如下: <body> <div class="bg" id="bg" style="display: n ...

  9. [图形学] Chp8.7.2 梁友栋-Barsky线段裁剪算法

    这节简单介绍了梁友栋-Barsky裁剪算法的原理,只有结论并没有过程,看过http://blog.csdn.net/daisy__ben/article/details/51941608这篇文章后,大 ...

  10. 流行框架angular

    ---恢复内容开始--- 一.angular是什么 一款非常优秀的前端高级js框架,由谷歌团队负责开发 angular是通过新的属性和表达扩展了html angular可以构建一个单一页面应用程序(s ...