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How to compare two dates?
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505
Use the datetime method and the operator < and its kin.
>>> from datetime import d...
.toArray(new MyClass[0]) or .toArray(new MyClass[myList.size()])?
...est version, on Hotspot 8, is:
MyClass[] arr = myList.toArray(new MyClass[0]);
I have run a micro benchmark using jmh the results and code are below, showing that the version with an empty array consistently outperforms the version with a presized array. Note that if you can reuse an existing arr...
Android emulator-5554 offline
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edited Aug 8 '19 at 9:50
louloulfx
4588 bronze badges
answered Jan 24 '14 at 10:27
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How do you reindex an array in PHP?
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edited Feb 26 '09 at 16:13
answered Feb 26 '09 at 16:07
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Cross browser JavaScript (not jQuery…) scroll to top animation
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20 Answers
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ROW_NUMBER() in MySQL
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107
I want the row with the single highest col3 for each (col1, col2) pair.
That's a groupwise...
How to get a specific output iterating a hash in Ruby?
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answered Aug 4 '09 at 13:38
community wiki
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sed error: “invalid reference \1 on `s' command's RHS”
...capture for that to work? i.e. for variant 2:
-r -e "s/WARNING: (\([a-zA-Z0-9./\\ :-]\+\))/${warn}WARNING: \1${c_end}/g" \
(Note: untested)
Without the -r argument back-references (like \1) won't work.
share
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How to find out element position in slice?
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70
Sorry, there's no generic library function to do this. Go doesn't have a straight forward way of...
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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