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How to count the number of true elements in a NumPy bool array
...e following.
numpy.sum(boolarr)
numpy.count_nonzero(boolarr)
Here's an example:
>>> import numpy as np
>>> boolarr = np.array([[0, 0, 1], [1, 0, 1], [1, 0, 1]], dtype=np.bool)
>>> boolarr
array([[False, False, True],
[ True, False, True],
[ True, False,...
What's the difference between struct and class in .NET?
...can also contain constructors, constants, fields, methods, properties, indexers, operators, events, and nested types, although if several such members are required, you should consider making your type a class instead."
– thewpfguy
Feb 27 '13 at 5:08
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Unnamed/anonymous namespaces vs. static functions
... an unnamed namespace are back to being essentially two ways of doing the exact same thing. For more discussion please see this SO question.
Unnamed namespaces still have the advantage of allowing you to define translation-unit-local types. Please see this SO question for more details.
Credit go...
Where are static variables stored in C and C++?
In what segment (.BSS, .DATA, other) of an executable file are static variables stored so that they don't have name collision?
For example:
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How do I trap ctrl-c (SIGINT) in a C# console app
... in a C# console application so that I can carry out some cleanups before exiting. What is the best way of doing this?
7 An...
What's the strangest corner case you've seen in C# or .NET? [closed]
...uage bits and bobs, but I also find core .NET things interesting too. For example, here's one which isn't on the page, but which I find incredible:
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CSS - Overflow: Scroll; - Always show vertical scroll bar?
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Just ran into this problem myself. OSx Lion hides scrollbars while not in use to make it seem more "slick", but at the same time the issue you addressed comes up: people sometimes cannot see whether a div has a scroll feature or not.
The fix: In your css inclu...
Automatic Preferred Max Layout Width is not available on iOS versions prior to 8.0
I opened an existing iOS project with Xcode6 beta6, and Xcode lists the following warning for both Storyboard and Xib files:
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How do I run a Ruby file in a Rails environment?
I want to run a Ruby file in the context of a Rails environment.
rails runner almost does what I want to do, but I'd like to just give it the file name and arguments. I'm pretty sure this is possible since I've done it before. Can someone remind me how to do this?
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Difference between return and exit in Bash functions
What is the difference between the return and exit statement in Bash functions with respect to exit codes?
10 Answers
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