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Booleans, conditional operators and autoboxing
...onditional expression is the result of applying capture conversion (§5.1.10) to lub(T1, T2) (§15.12.2.7).
S1 == <special null type> (see §4.1)
S2 == boolean
T1 == box(S1) == <special null type> (see last item in list of boxing conversions in §5.1.7)
T2 == box(S2) == `Boolean
lub(...
How to use FormData for AJAX file upload?
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480
For correct form data usage you need to do 2 steps.
Preparations
You can give your whole form...
Wait for a process to finish
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+50
To wait for any process to finish
Linux:
tail --pid=$pid -f /dev/null
Darwin (requires that $pid has open files):
lsof -p $pid +r...
Can I use `pip` instead of `easy_install` for `python setup.py install` dependency resolution?
...ip install https://pypi.python.org/packages/source/r/requests/requests-2.3.0.tar.gz
Install from local tarball
wget https://pypi.python.org/packages/source/r/requests/requests-2.3.0.tar.gz
pip install requests-2.3.0.tar.gz
Install from local folder
tar -zxvf requests-2.3.0.tar.gz
cd requests-2...
Why doesn't c++ have &&= or ||= for booleans?
... is then equivalent to static_cast<int>(b) & 2, which results in 0, which is then converted back into a bool. So it’s true that the existence of an operator &&= would improve type safety.
share
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“Comparison method violates its general contract!”
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edited May 30 '14 at 6:34
rkg
15533 silver badges1313 bronze badges
answered Nov 30 '11 at...
Failed to import new Gradle project: failed to find Build Tools revision *.0.0
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edited May 30 '13 at 14:38
Community♦
111 silver badge
answered May 18 '13 at 3:57
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Why not use Double or Float to represent currency?
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1028
Because floats and doubles cannot accurately represent the base 10 multiples that we use for m...
What does the [Flags] Enum Attribute mean in C#?
...ght expect in bitwise operations, because by default the values start with 0 and increment.
Incorrect declaration:
[Flags]
public enum MyColors
{
Yellow, // 0
Green, // 1
Red, // 2
Blue // 3
}
The values, if declared this way, will be Yellow = 0, Green = 1, Red = 2, B...
How can I sharpen an image in OpenCV?
...f frame into image: (both cv::Mat)
cv::GaussianBlur(frame, image, cv::Size(0, 0), 3);
cv::addWeighted(frame, 1.5, image, -0.5, 0, image);
The parameters there are something you need to adjust for yourself.
There's also Laplacian sharpening, you should find something on that when you google.
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