C#中查询字符串中是否包含指定字符/串,使用IndexOf还是Contains?这是一个很常见的命题,以前也没有注意,今天QQ群里有人提起,于是就做了下试验,代码如下: using System; using System.Diagnostics; namespace ConsoleApplication1 { class Program { private const int N = 10000000; private static Stopwatch watch = new Stopwatc
python 判断字符串中是否只有中文字符 学习了:https://segmentfault.com/q/1010000007898150 def is_all_zh(s): for c in s: if not ('\u4e00' <= c <= '\u9fa5'): return False return True
server.txt内容如下: 阿里云服务器 关于应用场景,就不多说了,字符串是不论是后端开发还是前端开发等,都是要经常打交道了. test.js(node.js代码,只要被本地装了node.js环境,直接可通过node test.js运行看效果): var fs = require("fs"); var result = fs.readFileSync("./server.txt"); console.log("result:"+result)
A. Generous Kefa time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output One day Kefa found n baloons. For convenience, we denote color of i-th baloon as si — lowercase letter of the Latin alphabe