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micro:bit 微控制器教程 · App Inventor 2 中文网
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步骤4：发送控制指令
使用四个按钮的 TouchDown 事件来发送不同的指令给 micro:bit，使用 WriteRXCharacteristic 指令来发送 “R\n” 这样的字符串，R 是根据不同按钮的控制指令，\n 是换行符号，代表一个命令的结尾。
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What exactly does Perl's “bless” do?
...answered Dec 24 '08 at 19:58
Gordon WilsonGordon Wilson
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How do I remove a folder from source control with TortoiseSVN?
How do I remove a folder from being source controlled with TortoiseSVN ?
13 Answers
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How to run a program without an operating system?
How do you run a program all by itself without an operating system running?
Can you create assembly programs that the computer can load and run at startup, e.g. boot the computer from a flash drive and it runs the program that is on the CPU?
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Long press gesture on UICollectionViewCell
...ress gesture recognizer to a (subclass of) UICollectionView. I read in the documentation that it is added by default, but I can't figure out how.
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How do you enable “Enable .NET Framework source stepping”?
...that caused the dll to change, and then remove them. This has the obvious downside of having those security updates removed on your machine.
Workaround
Identify which dll you want to debug into (e.g. System.Windows.Forms.dll)
While debugging, open the Modules window in Visual studio, find the Ve...
What is exactly the base pointer and stack pointer? To what do they point?
...having executed a single line from it. At that point, what is ebp's value? Does the stack have anything at that point besides the pushed arguments? Thanks!
– devoured elysium
Sep 9 '09 at 12:33
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Vim: Creating parent directories on save
If I invoke vim foo/bar/somefile but foo/bar don't already exist, Vim refuses to save.
6 Answers
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Passing references to pointers in C++
...e allowed to pass a reference to a pointer in C++. However, my attempts to do so are failing, and I have no idea why.
10 A...
Rename all files in directory from $filename_h to $filename_half?
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Just use bash, no need to call external commands.
for file in *_h.png
do
mv "$file" "${file/_h.png/_half.png}"
done
Do not add #!/bin/sh
For those that need that one-liner:
for file in *.png; do mv "$file" "${file/_h.png/_half.png}"; done
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