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App Inventor 2 UrsPahoMqttClient 拓展 - 物联网轻量级MQTT协议 · App Inventor 2 中文网

... 参数(2 表示已连接)。 可能的状态有: 代码 状态 含义 允许调用方法 0 Disconnected 客户端未连接到服务器。 Connect 1 Connecting 客户端尝试连接到服...
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App Inventor 2 视频播放器教程 - VideoPlayer组件与WebView嵌入播放 · App Inventor 2 中文网

...式 四、播放本地视频 4.1 上传视频文件 4.2 代码控制播放 五、播放网络视频 5.1 设置网络视频源 5.2 使用 TextBox 让用户输入视频地址 六、VideoPlayer 属性详解 6.1 属性列表 6.2 动...
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How to find the operating system version using JavaScript?

...|Mac_PowerPC|Macintosh)/}, {s:'QNX', r:/QNX/}, {s:'UNIX', r:/UNIX/}, {s:'BeOS', r:/BeOS/}, {s:'OS/2', r:/OS\/2/}, {s:'Search Bot', r:/(nuhk|Googlebot|Yammybot|Openbot|Slurp|MSNBot|Ask Jeeves\/Teoma|ia_archiver)/} ]; for (var...
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postgresql port confusion 5433 or 5432?

...ault ports, but the Pg that shipped with Mac OS X has a different default unix socket path, so even if the server is running on the same port it won't be listening to the same unix socket. Most Mac users work around this by just using tcp/ip with psql -h localhost. You can also specify a port if r...
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Arduino 101 实验06 - 土壤湿度传感器,做一个浇水提醒 · App Inventor 2 中文网

...材清单 二、接线 三、界面组件 四、分步搭代码块 第 1 步:先看原始值 第 2 步:两点标定 第 3 步:换算成百分比并提醒 五、排错表 六、下一步 相关文档 ...
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App Inventor 2 人脸识别App开发 - 第三方API接入的通用方法 · App Inventor 2 中文网

...返回JSON示例 请求失败返回JSON示例 JSON解析参考代码 aia源码 « 返回首页 App效果图,可以识别人脸,推断出性别及年龄: App原理介绍 通过调用第三方人脸识别api,按照指定格式上传图片及...
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When do I use the PHP constant “PHP_EOL”?

...he newline character in a cross-platform-compatible way, so it handles DOS/Unix issues. Note that PHP_EOL represents the endline character for the current system. For instance, it will not find a Windows endline when executed on a unix-like system. ...
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Pass a local file in to URL in Java

... in "URI vs URL". Anway java.net.URL.toString() produces the same thing on Unix, as it must. It only displays one "/" which is very wrong (see file URI scheme). I guess this is in Java because of reasons, better use java.net.URI. It correctly generates "file://[host]/" on a call to .toString(). ...
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Boost.Asio的简单使用(Timer,Thread,Io_service类) - C/C++ - 清泛网 - 专注C/C++及内核技术

...时了. std::cout << "Hello, world! "; return 0; } 完整的代码: #include <iostream> #include <boost/asio.hpp> #include <boost/date_time/posix_time/posix_time.hpp> int main() { boost::asio::io_service io; boost::asio::deadline_timer t(io, boost::posix_time::seco...
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乐高 EV3 实验03 - 接触传感器,撞到就停 · App Inventor 2 中文网

... 一、器材与接线 二、界面组件 三、分步搭代码块 第 1 步:先确认传感器能读到 第 2 步:出发,撞到就停 第 3 步:撞到后自动后退 第 4 步:停止与收尾 四、排...