大约有 40,000 项符合查询结果(耗时:0.0362秒) [XML]

https://bbs.tsingfun.com/thread-3079-1-1.html 

App Inventor 2 物联网入门的两个方向:BLE直连硬件 vs MQTT云端通信,你的...

"我想用手机App控制家里的灯,该用蓝牙还是WiFi?" 这是 App Inventor 2 中文网社区里被反复问到的问题。很多初次接触物联网的开发者,以为物联网就是"让手机连上硬件",结果买错了模块、选错了方案,项目卡在...
https://bbs.tsingfun.com/thread-3068-1-1.html 

我帮儿子用App Inventor 2给遥控车装了"蓝牙大脑",手机一划车就...

周五晚上,儿子抱着他那辆吃灰半年的遥控车跑来问我:"爸爸,能不能让手机控制它?我想躺在床上就能让它跑。"看着他期待的眼神,我决定用App Inventor 2的蓝牙组件试试。没想到两小时就搞定了,而且连接稳定性和操...
https://bbs.tsingfun.com/thread-2516-1-1.html 

首次打开app时,提示打开蓝牙权限,打开后点击开始搜索,设备列表没有显示...

...先打开蓝牙,然后启动app才能搜索到设备,请问大家这个怎么解决,怎么才能启动app同时打开蓝牙权限并搜索到设备?
https://www.tsingfun.com/it/cpp/1446.html 

C++实现一款简单完整的聊天室服务器+客户端 - C/C++ - 清泛网 - 专注C/C++及内核技术

...de "ClientDlg.h" #ifdef _DEBUG #define new DEBUG_NEW #endif // 用于应用程序“关于”菜单项的 CAboutDlg 对话框 class CAboutDlg : public CDialog { public: CAboutDlg(); // 对话框数据 enum { IDD = IDD_ABOUTBOX }; protected: virtual void DoDataExchange(CDataExchange...
https://stackoverflow.com/ques... 

Get Character value from KeyCode in JavaScript… then trim

...k on) generates keycode 97. Used with String.fromCharCode we get the following: String.fromCharCode(49) returns "1" String.fromCharCode(97) returns "a" String.fromCharCode expects unicode charcodes, not javascript keycodes. The key a generates an event with a keycode of 65, independentant of th...
https://stackoverflow.com/ques... 

mingw-w64 threads: posix vs win32

I'm installing mingw-w64 on Windows and there are two options: win32 threads and posix threads. I know what is the difference between win32 threads and pthreads but I don't understand what is the difference between these two options. I doubt that if I will choose posix threads it will prevent me fro...
https://www.tsingfun.com/it/cpp/762.html 

Linux Shell中 if else及大于、小于、等于逻辑表达式写法 - C/C++ - 清泛网...

...,笔者就曾因为空格缺少或位置不对,而浪费好多宝贵的时间。 格式: if ....; then .... elif ....; then .... else .... fi [ -f "somefile" ] :判断是否是一个文件 [ -x "/bin/ls" ] :判断/bin/ls是否存在并有可执行权限 [ -n "$var" ] :判断...
https://www.tsingfun.com/ilife/tech/424.html 

苹果第三财季大中华区营收132.3亿美元 同比增长112% - 资讯 - 清泛网 - 专...

...创纪录营收以及Apple Watch成 苹果股价 凤凰科技讯 北京时间7月22日消息,苹果(NASDAQ:AAPL)今天发布了截至6月27日的2015财年第三季度财报。财报显示,苹果第三财季净销售额为496.05亿美元,较去年同期的374.32亿美元增长32.5%;净利...
https://stackoverflow.com/ques... 

How do I determine the current operating system with Node.js

... shell scripts for use when developing on a platform. We have both Mac and Windows developers. Is there a variable I can check for in Node to run a .sh file in one instance and .bat in another? ...
https://www.tsingfun.com/it/tech/1055.html 

Nginx缓存解决方案:SRCache - 更多技术 - 清泛网 - 专注C/C++及内核技术

...用直接翻番,可实际上它们的内容大同小异,所以在实际应用时,我们应该仅仅缓存没有callback的数据,而对于有callback的请求,可以用xss-nginx-module来搞定。 关于激活SRCache前后的性能对比,视环境的不同会有所差异,不过绝对...