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std::string截取字符串,截取ip:port - c++1y / stl - 清泛IT社区,为创新赋能!

std::string ip("127.0.0.1:8888"); int index = ip.find_last_of(':'); // 获取ip ip.substr(0, index).c_str(); // 获取port ip.substr(index + 1).c_str();
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Unicode and UTF-8 - 综合 - 清泛IT论坛,有思想、有深度

Unicode预订的编码空间大小为0x0-0x10FFFF,最多可以容纳1114112(100多万)个字符,实际上并不能使用这么多的空间,于是编码方式出现了两种:ucs-2(BMP)和ucs-4 编码方式,其中,bmp是Basic Multilingual Plane的简写。 一个字符的Unicode编码(...
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图片轮播拓展 - ColinTreeSlideShow - App Inventor 2 拓展 - 清泛IT社区,为创新赋能!

图片轮播,一“件”搞定!2017.9.24更新(v2) 融合了新组件AsyncImageLoader,现在直接加载在线图片也不会卡啦GitHub Release 2017.9.17发布第一版本 GitHub Release 基本使用流程为该组件预留一个空的 水平滚动布局,将宽高设置好 (...
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APP INVENTOR硬件交互学习教程07——多个参数上报 - 创客硬件开发 - 清泛IT...

... =  7; const int bluetoothPin = 13; // 变量定义 int inByte=0;   //接收参数 #define TRUE 1 #define FALSE 0 void setup() {   // 配置输出引脚   pinMode(ledPin1, OUTPUT);   pinMode(ledPin2, OUTPUT);   pinMode(ledPin3, OUTPUT);...
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App Inventor 2 做个计算器怎手机运行后报错 - App应用开发 - 清泛IT社区,为创新赋能!

...机运行后报错 什么原因呢?根据报错字面,2.63...除以 0 异常,一定要对除数进行非零的判断,使用数学代码块=0 判断。当输入框没有输入内容时,数学运算会转成 0 处理,因此就会出现除零异常。要先用文本块是否为空进行判...
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Error while installing json gem 'mkmf.rb can't find header files for ruby'

... 809 Modern era update, as stated by mimoralea: In case that you are using ruby 2.0 or 2.2 (than...
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How to enable/disable bluetooth programmatically in android

... 30 Android BluetoothAdapter docs say it has been available since API Level 5. API Level 5 is Androi...
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PHP-FPM doesn't write to error log

... 190 This worked for me: ; Redirect worker stdout and stderr into main error log. If not set, stdout...
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How to do case insensitive search in Vim

... There's also set smartcase which will automatically switch to a case-sensitive search if you use any capital letters. – Zaz Jun 5 '15 at 22:22 89 ...
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Properly close mongoose's connection once you're done

... 207 You can close the connection with mongoose.connection.close() ...