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What does the 'b' character do in front of a string literal?
Apparently, the following is the valid syntax:
8 Answers
8
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BLE（二）信道&数据包&协议栈格式 - 创客硬件开发 - 清泛IT社区，...
文章源自：https://www.gandalf.site/2018/11/ble_23.html
参考低功耗蓝牙（BLE）安全初探
0x1 信道BLE的物理通道即“频道，分别是‘f=2402+k*2 MHz, k=0, … ,39’，带宽为2MHz”的40个RF Channel。
其中，有3个信道是advertising channel（广播通道）...
What is the python keyword “with” used for? [duplicate]
What is the python keyword "with" used for?
2 Answers
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Check if a value exists in pandas dataframe index
...Y', 'Y'], 'col3': [1, 2, 3, 4]}, columns=['col1', 'col2', 'col3'])
df = df.set_index(['col1', 'col2'])
in df.index works for the first level only when checking single index value.
'a' in df.index # True
'X' in df.index # False
Check df.index.levels for other levels.
'a' in df.index.lev...
Which is more efficient, a for-each loop, or an iterator?
...does depend on the underlying structure. And as a side note, iterating HashSets is also very expensive (much more than an Array List), so avoid those like the plague (if you can).
– Leo
Sep 26 '14 at 11:42
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static linking only some libraries
How can I statically link only a some specific libraries to my binary when linking with GCC?
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Deny access to one specific folder in .htaccess
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We will set the directory to be very secure, denying access for all file types. Below is the code you want to insert into the .htaccess file.
Order Allow,Deny
Deny from all
Since we have now set the security, we now want to all...
Streaming Audio from A URL in Android using MediaPlayer?
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simple Media Player with streaming example.For xml part you need one button with id button1 and two images in your drawable folder with name button_pause and button_play and please don't forget to add the internet permission in your manifest.
public class MainActivit...
Query-string encoding of a Javascript Object
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@Ofri: For POST requests to a server set up to receive it, JSON is a good choice. For GET requests, if you're sending anything other than a few simple parameters to the server then it's likely your design is wrong.
– Tim Down
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ctypes - Beginner
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