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numpy: most efficient frequency counts for unique values in an array
...ncount(x)
ii = np.nonzero(y)[0]
And then:
zip(ii,y[ii])
# [(1, 5), (2, 3), (5, 1), (25, 1)]
or:
np.vstack((ii,y[ii])).T
# array([[ 1, 5],
[ 2, 3],
[ 5, 1],
[25, 1]])
or however you want to combine the counts and the unique values.
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Best approach to remove time part of datetime in SQL Server
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23 Answers
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Java code To convert byte to Hexadecimal
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313
byte[] bytes = {-1, 0, 1, 2, 3 };
StringBuilder sb = new StringBuilder();
for (byt...
I want to delete all bin and obj folders to force all projects to rebuild everything
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433
This depends on the shell you prefer to use.
If you are using the cmd shell on Windows then th...
Preloading images with jQuery
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973
Quick and easy:
function preload(arrayOfImages) {
$(arrayOfImages).each(function(){
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Maximum execution time in phpMyadmin
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edited Jun 16 '17 at 1:13
Simon East
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C# Iterating through an enum? (Indexing a System.Array)
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13 Answers
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undefined reference to `WinMain@16'
... objdump -x a.exe | findstr /i "^subsystem"
Subsystem 00000003 (Windows CUI)
C:\test> _
This means that the linker by default produced a console subsystem executable. The subsystem value in the file header tells Windows what services the program requires. In this case, wit...
Using HTML5/Canvas/JavaScript to take in-browser screenshots
...n a very experimental state, as it does not parse nearly as much of the CSS3 attributes I would want it to, nor does it have any support to load CORS images even if a proxy was available.
Still quite limited browser compatibility (not because more couldn't be supported, just haven't had time to mak...
Pinging servers in Python
...tion works in any OS (Unix, Linux, macOS, and Windows)
Python 2 and Python 3
EDITS:
By @radato os.system was replaced by subprocess.call. This avoids shell injection vulnerability in cases where your hostname string might not be validated.
import platform # For getting the operating system name...