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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...
... | 不需要，离线可用 | 需要 WiFi/4G 联网
• 传输距离 | 10-30米（经典范围） | 理论上全球可达
• 硬件成本 | 低（BLE模块约15-30元） | 较高（WiFi模块+服务器）
• 功耗 | 极低（纽扣电池可工作数月） | 中等（WiFi模块耗电大）
•...
How to completely uninstall Visual Studio 2010?
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Update April 2016 - for VS2013+
Microsoft started to address the issue in late 2015 by releasing VisualStudioUninstaller.
They abandoned the solution for a while; however work has begun again again as of April 2016.
There has finally been an official rel...
What is the purpose of wrapping whole Javascript files in anonymous functions like “(function(){ … }
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edited Apr 2 at 3:03
answered Mar 11 '10 at 1:32
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Can a program depend on a library during compilation but not runtime?
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edited Mar 22 '14 at 18:36
Emre Yazici
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answere...
When to use enumerateObjectsUsingBlock vs. for
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350
Ultimately, use whichever pattern you want to use and comes more naturally in the context.
Wh...
使用App Inventor 2 控制物联网设备/低功耗蓝牙设备(BLE) · App Inventor 2 中文网
...，特征也通过其自己唯一的数字 UUID [7] 来区分自己。 图 3 显示了服务和特征的层次性质，其中特征位于 GATT 事务的最低级别。 客户端依靠某个特征为其赋予数据值，以便在与服务器交换数据时可以进行读写。
图 3：BLE GATT 通...
When should you not use virtual destructors?
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answered Nov 19 '08 at 4:33
sepsep
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Anatomy of a “Memory Leak”
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edited May 14 '18 at 20:34
q-l-p
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answered Aug ...
Is there a practical use for weak references? [duplicate]
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answered Jan 9 '12 at 15:13
Peter LawreyPeter Lawrey
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MaterialDialog 对话框增强扩展 · App Inventor 2 中文网
...以英文逗号分隔的列表项字符串，例如 "选项1,选项2,选项3"。
效果预览：
when 按钮_选择.Click() {
MaterialDialog1.ShowListDialog("listDialog1", "请选择一个选项", "选项1,选项2,选项3,选项4")
}
使用案例
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