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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();
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(...
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
(...
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);...
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...
Error while installing json gem 'mkmf.rb can't find header files for ruby'
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809
Modern era update, as stated by mimoralea:
In case that you are using ruby 2.0 or 2.2 (than...
How to enable/disable bluetooth programmatically in android
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30
Android BluetoothAdapter docs say it has been available since API Level 5. API Level 5 is Androi...
PHP-FPM doesn't write to error log
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190
This worked for me:
; Redirect worker stdout and stderr into main error log. If not set, stdout...
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
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207
You can close the connection with
mongoose.connection.close()
...
