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Do I need to heartbeat to keep a TCP connection open?
...rdless but yes it's often common to see protocols implement a heartbeat in order to help detect dead connections, IRC with the PING command for example.
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Get the Row(s) which have the max count in groups using groupby
...s) I found it to be very slow. Here is an alternative that I found to run orders of magnitude faster on my data set.
df = pd.DataFrame({
'sp' : ['MM1', 'MM1', 'MM1', 'MM2', 'MM2', 'MM2', 'MM4', 'MM4', 'MM4'],
'mt' : ['S1', 'S1', 'S3', 'S3', 'S4', 'S4', 'S2', 'S2', 'S2'],
'val' : ['a', ...
How to detect a Christmas Tree? [closed]
... is either less than 0.2 on a 0.0-1.0 scale (corresponding roughly to the border between yellow and green) or greater than 0.95 (corresponding to the border between purple and red) and additionally I require bright, saturated colors: saturation and value must both be above 0.7. The results of the t...
What are the different usecases of PNG vs. GIF vs. JPEG vs. SVG?
...uld certain image file types be used when building websites or interfaces, etc?
13 Answers
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How can I get the MD5 fingerprint from Java's keytool, not only SHA-1?
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To get MD5 value and SHA1...etc fallow this below:
Before this dont forget to copy the debug.keystore to a folder Androidkeystore like that created in C drive.
C:\Program Files\Java\jdk1.7.0_05\bin>keytool -v -list -keystore C:\Androidkeyst
ore\deb...
How do you enable “Enable .NET Framework source stepping”?
....dll independent of the other dlls that should get rolled back with it (in order for it to work properly). Furthermore, temporary updating the GAC with old dlls would essentially be equivalent to temporarily uninstalling the security update.
– Matt Smith
Sep 2...
Is it possible to set a custom font for entire of application?
... support other Views. I'm not sure about issues with Buttons, RadioGroups, etc. because those classes all extend TextView so they should work just fine. I added a boolean conditional for using reflection because it seems very hackish and might notably compromise performance.
Note: as pointed out, t...
Bootstrap Dropdown menu is not working
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I realized that the order of those code lines is also important. If you put google apis as last line of code, then it does not work.
– Efe Büyük
May 9 '17 at 16:16
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Is there any standard for JSON API response format?
...). Define a uniform structure for errors (ex: code, message, reason, type, etc) and use it for errors, if it is a success then just return the expected json response.
Pros: Still standard as you use the existing HTTP status codes and you return a json describing the error (you provide more informa...
Get last n lines of a file, similar to tail
... block_number = -1
blocks = [] # blocks of size BLOCK_SIZE, in reverse order starting
# from the end of the file
while lines_to_go > 0 and block_end_byte > 0:
if (block_end_byte - BLOCK_SIZE > 0):
# read the last block we haven't yet read
...