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2024年11月1日签到记录贴 - 签到区 - 清泛IT社区，为创新赋能！
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串口Read不到数据的问题 - 用户反馈 - 清泛IT社区，为创新赋能！
用户发送的是 8n1 的格式，但是ai2的串口貌似不支持这种格式。写串口正常，读串口为空，len为0。
目前经过测试验证，应该是 \n 作为结束符的。发送时，也是。
ai2使用 physicaloid 库完成的串口功能。
Batch file to copy files from one folder to another folder
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xcopy.exe is definitely your friend here.
It's built into Windows, so its cost is nothing.
Just xcopy /s c:\source d:\target
You'd probably want to tweak a few things; some of the options we also add include these:
/s/e - recursive copy, including copying empty directories.
/v -...
How do I put a clear button inside my HTML text input box like the iPhone does?
... Javascript version and it worked well, except for centering the button on Win/Linux Firefox/Chrome. I solved that by removing top: in the child span and setting display: flex; align-items: center; in the parent span.
– thomasa88
Jun 19 at 7:18
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Programmer Puzzle: Encoding a chess board state throughout a game
...s “all subsequent legal moves”. The problem also says nothing about knowing the moves up to this point. That’s actually a problem as I’ll explain.
Castling
The game has proceeded as follows:
e4 e5
Nf3 Nc6
Bb5 a6
Ba4 Bc5
The board looks as follows:
White has the option of castling...
Remote branch is not showing up in “git branch -r”
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I'm using the GitHub client on Win and sometimes it doesn't update the remote branches. The first line "git remote update" works like a charm. Easy & clean
– Stefano Buora
Aug 9 '16 at 13:42
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jQuery .hasClass() vs .is()
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Update:
I committed a test following a comment and four upvotes to very comment. It turns out that what I had said is the correct answer. Here is the result:
http://jsperf.com/hasclass-vs-is-so
The is is multi-purpose, you can for example do is('.class'),...
Java NIO FileChannel versus FileOutputstream performance / usefulness
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Based on my tests (Win7 64bit, 6GB RAM, Java6), NIO transferFrom is fast only with small files and becomes very slow on larger files. NIO databuffer flip always outperforms standard IO.
Copying 1000x2MB
NIO (transferFrom) ~2300ms
NIO (dire...