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...点通信。广播访问地址广播包：广播包Access Address 固定为0x8E89BED6，广播包只能在广播信道（channel）上传输，即只能在37/38/39信道上传输（注：从蓝牙5.0开始广播包可以在其它信道上传输）。广播包发送给附近所有的observer（扫描...
Is there a replacement for unistd.h for Windows (Visual C)?
...le console program written for Unix to the Windows platform ( Visual C++ 8.0 ). All the source files include "unistd.h", which doesn't exist. Removing it, I get complaints about misssing prototypes for 'srandom', 'random', and 'getopt'.
I know I can replace the random functions, and I'm pretty sure...
Get escaped URL parameter
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edited Apr 27 '11 at 6:02
pauloppenheim
6577 bronze badges
answered Sep 10 '09 at 8:38
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Find column whose name contains a specific string
... = {'spike-2': [1,2,3], 'hey spke': [4,5,6], 'spiked-in': [7,8,9], 'no': [10,11,12]}
df = pd.DataFrame(data)
spike_cols = [col for col in df.columns if 'spike' in col]
print(list(df.columns))
print(spike_cols)
Output:
['hey spke', 'no', 'spike-2', 'spiked-in']
['spike-2', 'spiked-in']
Explanat...
How to overwrite the previous print to stdout in python?
... the start of the line without advancing to the next line:
for x in range(10):
print '{0}\r'.format(x),
print
The comma at the end of the print statement tells it not to go to the next line. The last print statement advances to the next line so your prompt won't overwrite your final output.
Upd...
How can I fix the Microsoft Visual Studio error: “package did not load correctly”?
I installed Visual Studio 2012 and DevExpress 13.1. As Visual Studio started, it generated an error shown by this attached image,
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SQL select join: is it possible to prefix all columns as 'prefix.*'?
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answered Dec 1 '08 at 3:42
dkretzdkretz
36.2k1313 gold badges7575 silver badges133133 bronze badges
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How can I avoid running ActiveRecord callbacks?
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edited Dec 3 '10 at 4:01
answered Mar 11 '09 at 4:29
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How should I call 3 functions in order to execute them one after the other?
...em asynchronously using the setTimeout function.
setTimeout(doSomething, 10);
setTimeout(doSomethingElse, 10);
setTimeout(doSomethingUsefulThisTime, 10);
This is, however, a bit ugly and violates the DRY principle[wikipedia]. We could clean this up a bit by creating a function that accepts an arr...
When should we use mutex and when should we use semaphore
... edited Aug 22 '12 at 7:29
j0k
21.5k1414 gold badges7373 silver badges8484 bronze badges
answered Aug 22 '12 at 3:12
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