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App Inventor 2 经典蓝牙(SPP) 硬件接入:hc05 · App Inventor 2 中文网

...论 « 返回首页 Iot 专题 经典蓝牙硬件有很多款,但hc05尤为常见,这里以hc05为例,介绍一下经典蓝牙模块如何接入AppInventor。 HC05 简单介绍 它有六个引脚,引脚的作用如下: 通过厂商App连接串口测...
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IRXmitter红外发射器扩展 · App Inventor 2 中文网

...Control.aia 开发动机 我的电视遥控器总藏得很隐蔽,但要找到我的智能手机就容易多了。如果需要,我可以呼叫它,它会发出声音应答。可惜我的电视(Metz设备)没有可以发送合适红外代码的应用程序 :-(...
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初窥InnoDB的Memcached插件 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术

...种种原因,HandlerSocket并没有真正流行起来,不过庆幸的MySQL官方受其启发,研发了基于InnoDB的Memcached插件,总算在MySQL中延续了NoSQL的香火,以前单独架设Memcached服务器不仅浪费了内存,而且还必须自己维护数据的不一致问...
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Make a UIButton programmatically in Swift

...itional setup after loading the view, typically from a nib. let myFirstLabel = UILabel() let myFirstButton = UIButton() myFirstLabel.text = "I made a label on the screen #toogood4you" myFirstLabel.font = UIFont(name: "MarkerFelt-Thin", size: 45) myFirstLabel.textColor = UIColor.r...
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How do you remove the title text from the Android ActionBar?

... In your Manifest <activity android:name=".ActivityHere" android:label=""> share | improve this answer | follow | ...
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滚动布局管理器拓展 - ScrollArrangementHandler · App Inventor 2 中文网

...件处理 when HorizontalScrollHandler1.ScrollChanged scrollX do set Label_Position.Text to "当前位置: " & scrollX // 到达右端事件 when HorizontalScrollHandler1.ReachRightEnd do show notification "已到达最右端" // 垂直滚动事件处理 when VerticalScrollHandler1.ScrollC...
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Memory address of variables in Java

... code for printAddresses() : public static void printAddresses(String label, Object... objects) { System.out.print(label + ": 0x"); long last = 0; int offset = unsafe.arrayBaseOffset(objects.getClass()); int scale = unsafe.arrayIndexScale(objects.getClass()); switch (scale) ...
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了解 Boost Filesystem Library - C/C++ - 清泛网 - 专注C/C++及内核技术

... 缺乏定义良好的、用于处理文件系统操作的库,这一直 C++ 语言存在的一个问题。过去,程序员必须使用本机 API 来解决此问题。通过本文您将了解一个提供安全、可移植且易用的 C++ 接口来促进文件系统操作的库:Boost Filesys...
https://www.tsingfun.com/it/tech/1649.html 

关于php的socket初探 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...望去学习新知识的那种动力,可能在大多数的人眼里,php专为web而生,做wep app一流的快速好用,并极易简单和容易上手,做起web所需的各项功能可能分分钟搞定,然后做socket了?可能就觉得不屑一顾了,好像不务正业...
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When should I really use noexcept?

...tement using x } The flow graph for this function is different if bar is labeled noexcept (there is no way for execution to jump between the end of bar and the catch statement). When labeled as noexcept, the compiler is certain the value of x is 5 during the baz function - the x=5 block is said to...