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Kill some processes by .exe file name
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what should be do if above code return Exception (a 32 bit processes cannot access modules of a 64 bit process) ?
– Manish
Aug 31 '13 at 11:29
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Does java.util.List.isEmpty() check if the list itself is null? [duplicate]
Does java.util.List.isEmpty() check if the list itself is null , or do I have to do this check myself?
8 Answers
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How can I convert an RGB image into grayscale in Python?
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How about doing it with Pillow:
from PIL import Image
img = Image.open('image.png').convert('LA')
img.save('greyscale.png')
Using matplotlib and the formula
Y' = 0.2989 R + 0.5870 G + 0.1140 B
you could do:
import numpy as np...
Boolean method naming readability
Simple question, from a readability standpoint, which method name do you prefer for a boolean method:
12 Answers
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Is it possible to use argsort in descending order?
...methods are O(n log n) in time complexity, because the argsort call is the dominant term here. But the second approach has a nice advantage: it replaces an O(n) negation of the array with an O(1) slice. If you're working with small arrays inside loops then you may get some performance gains from a...
Override compile flags for single files
...rget rather than overwriting as you seem to expect. For example, from the docs for Properties on Source Files - COMPILE_FLAGS:
These flags will be added to the list of compile flags when this source file builds.
You should be able to countermand the -Weffc++ flag for foo.cpp by doing
set_sou...
must appear in the GROUP BY clause or be used in an aggregate function
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spain | usopp | 5.0000000000000000
But you may also use window functions, which looks simpler:
SELECT cname, wmname, MAX(avg) OVER (PARTITION BY cname) AS mx
FROM makerar
;
The only thing with this method is that it will show all records (window functions do not group). But it wil...
What is the difference between IEnumerator and IEnumerable? [duplicate]
...tEnumerator which returns an IEnumerator interface, this in turn allows readonly access to a collection. A collection that implements IEnumerable can be used with a foreach statement.
Definition
IEnumerable
public IEnumerator GetEnumerator();
IEnumerator
public object Current;
public void Rese...
Indentation shortcuts in Visual Studio
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Tab and Shift+Tab will do that.
Another cool trick is holding down ALT when you select text, it will allow you to make a square selection. Starting with VS2010, you can start typing and it will replace the contents of your square selection with w...
C# Thread safe fast(est) counter
...he bus to prevent another CPU from accessing the bus while the calling CPU does its operation. Now, take a look at the C# lock() statement's IL. Here you will see calls to Monitor in order to begin or end a section.
In other words, .Net lock() statement is doing a lot more than the .Net Interlock...