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ble 蓝牙透传代码怎么写？ - 创客硬件开发 - 清泛IT社区，为创新赋能！
...用我们这个模块这个地址可以吗？
上图中是控制服务id：SERVICEF000_UUUID = UUID.fromString("0000f000-0000-1000-8000-00805f9b34fb");以及2个控制端口的特征id。
可以做到透传，不过要换透传 id，这个 id 是 io 控制口
晚一些我给你一...
SQL UPDATE SET one column to be equal to a value in a related table referenced by a different column
...
update q
set q.QuestionID = a.QuestionID
from QuestionTrackings q
inner join QuestionAnswers a
on q.AnswerID = a.AnswerID
where q.QuestionID is null -- and other conditions you might want
I recommend to check what the result set to update is befo...
Why does the default parameterless constructor go away when you create one with parameters
...s constructor, which will have no effect but to allow instantiation. This means that I don't have to include an empty constructor in my code just to make it work.
If I've defined a constructor of my own, especially one with parameters, then I most likely have logic of my own that must be executed o...
.rar, .zip files MIME Type
...mime-type value is application/x-rar-compressed.
application/octet-stream means as much as: "I send you a file stream and the content of this stream is not specified" (so it is true that it can be a zip or rar file as well). The server is supposed to detect what the actual content of the stream is....
Convert PDF to clean SVG? [closed]
... I am using currently maps a path for every letter in every piece of text, meaning if I change the text in its source file, it looks ugly.
...
__FILE__, __LINE__, and __FUNCTION__ usage in C++
...d to the
function name. Otherwise, returns an empty string.
where NTBS means "Null Terminated Byte String".
I'll give it a try when support arrives to GCC, GCC 9.1.0 with g++-9 -std=c++2a still doesn't support it.
https://en.cppreference.com/w/cpp/utility/source_location claims usage will be l...
Wait for all promises to resolve
... That requires me to know the length of my chain though right? I mean if I had a promise of length 10, I would have to do $q.all([p1.then(..).then(...).then(...).then(...) ...]); right?
– jensengar
Feb 13 '14 at 16:22
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What is the global interpreter lock (GIL) in CPython?
...to interpreter internals from different threads. On multi-core systems, it means that multiple threads can't effectively make use of multiple cores. (If the GIL didn't lead to this problem, most people wouldn't care about the GIL - it's only being raised as an issue because of the increasing prevale...
MIT vs GPL license [closed]
...e project that is using the GPL code also becomes GPL automatically. Which means, it must be open-sourced, and the recipient gets all the same rights as you - meaning, they can turn around and distribute it, modify it, sell it, etc. And that would include your proprietary code which would then no lo...
selecting unique values from a column
...o if you want the whole record, the DISTINCT is worthless (unless it is an id field, and you can do a second query where id IN that list). Good news, though, if you have multiple duplicate results as a result of a JOIN you can do a GROUP BY and get the full results filtered.
– ...