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Finding quaternion representing the rotation from one vector to another
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Quaternion q;
vector a = crossproduct(v1, v2);
q.xyz = a;
q.w = sqrt((v1.Length ^ 2) * (v2.Len...
Code Golf: Collatz Conjecture
Inspired by http://xkcd.com/710/ here is a code golf for it.
70 Answers
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Checking images for similarity with OpenCV
...lue (maybe a percentage) that indicates how similar these images are? E.g. 100% would be returned if the same image was passed twice, 0% would be returned if the images were totally different.
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Cron job every three days
Is it possible to run a cronjob every three days? Or maybe 10 times/month.
11 Answers
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How do I get Flask to run on port 80?
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How do I create a dictionary with keys from a list and values defaulting to (say) zero? [duplicate]
I have a = [1,2,3,4] and I want d = {1:0, 2:0, 3:0, 4:0}
5 Answers
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How can I implode an array while skipping empty array items?
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212
You can use array_filter():
If no callback is supplied, all entries of input equal to FALSE...
Return a value if no rows are found in Microsoft tSQL
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Rename specific column(s) in pandas
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edited May 23 '17 at 12:34
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answered Nov 3 '13 at 21:32
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