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低功耗蓝牙(BLE) 和 经典蓝牙(SPP) 的区别 · App Inventor 2 中文网
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低功耗蓝牙(BLE) vs 经典蓝牙(SPP)
区别项
低功耗蓝牙(BLE)
经典蓝牙(SPP 串行端口协议)
蓝牙版本
蓝牙版本 >= 4.0，又称蓝牙低功耗、蓝牙智能
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App Inventor 2 Personal Image Classifier (PIC) 拓展：自行训练AI图像识...
...://www.hackster.io/mjrobot/app-inventor-edgeml-image-classification-fruits-vs-veggies-b671da
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Personal Image Classifier (PIC) 拓展：自行训练AI图像识别模型，开发图像...
...://www.hackster.io/mjrobot/app-inventor-edgeml-image-classification-fruits-vs-veggies-b671da
拓展及demo请至文档原文进行下载：https://www.fun123.cn/reference/ ... mageClassifier.html
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AppInventor2 调用位置传感器在高德地图上显示当前位置存在偏差？需进行坐...
...度,纬度>&coordsys=gps&output=JSON&key=标准 GPS 坐标 vs 高德坐标（火星坐标）有什么差异，以及为什么需要转换。这涉及到坐标基准体系（geodetic datum）的问题。
一、两种坐标体系定义
1️⃣ GPS 坐标（WGS-84）
全称：WGS-84...
为什么会提示AppInventor2.exe 不是有效的 Win32 - App Inventor 2 离线版 ...
... 不是有效的 Win32 应用程序 这是为什么？
https://aka.ms/vs/16/release/vc_redist.x64.exe
装一个运行环境试试，如果还是运行不了，那就是不支持 win7。
还是建议使用 win10 及以上系统，win7 越来越不被兼容了。
How Python web frameworks, WSGI and CGI fit together
...kground reader in the form of an official python HOWTO which discusses CGI vs. FastCGI vs. WSGI and so on: http://docs.python.org/howto/webservers.html
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Custom HTTP headers : naming conventions
... makes it easy to look at and go, "oh, it's non-standard; I can ignore it" vs "there's those non-standard X- headers, and then there's this one I don't recognize; can I ignore it safely?"
– Cole Johnson
Jun 28 '14 at 2:02
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Cocoa: What's the difference between the frame and the bounds?
...ms at first, though. Let's use some pictures to help us understand.
Frame vs Bounds
In the first picture on the left we have a view that is located at the top left of its parent view. The yellow rectangle represents the view's frame. On the right we see the view again but this time the parent view...
How do I interpolate strings?
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This feature is such a beautiful thing. Especially with VS2015 and the editor support so you can clearly see the interpolated strings and get intellisense. It even works with methods! $("This feature is {GetDescription(FEATURE_AMAZING))}");
– Patrick
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Why does calling a method in my derived class call the base class method?
...n the base class, This MSDN article explains it very well.
Early binding VS Late binding
We have early binding at compile time for normal method (not virtual) which is the currrent case the compiler will bind call to method of base class that is method of reference type (base class) instead of th...