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What is the most efficient way of finding all the factors of a number in Python?
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Ry-♦
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answered Jul 23 '11 at 12:04
agfagf
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How do you get the width and height of a multi-dimensional array?
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answered Nov 23 '10 at 19:52
Reed CopseyReed Copsey
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Checking images for similarity with OpenCV
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This is a huge topic, with answers from 3 lines of code to entire research magazines.
I will outline the most common such techniques and their results.
Comparing histograms
One of the simplest & fastest methods. Proposed decades ago as a means to find picture s...
Replacing a 32-bit loop counter with 64-bit introduces crazy performance deviations with _mm_popcnt_
...ependency chain depending on what the register allocator decided to do.
13 GB/s has a chain: popcnt-add-popcnt-popcnt → next iteration
15 GB/s has a chain: popcnt-add-popcnt-add → next iteration
20 GB/s has a chain: popcnt-popcnt → next iteration
26 GB/s has a chain: popcnt-popcnt → next i...
Is it possible to set a number to NaN or infinity?
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– David Heffernan
Mar 25 '11 at 22:30
2
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Python pandas Filtering out nan from a data selection of a column of strings
...NaN:
In [87]:
nms
Out[87]:
movie name rating
0 thg John 3
1 thg NaN 4
3 mol Graham NaN
4 lob NaN NaN
5 lob NaN NaN
[5 rows x 3 columns]
In [89]:
nms = nms.dropna(thresh=2)
In [90]:
nms[nms.name.notnull()]
Out[90]:
movie name rating
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Change column type from string to float in Pandas
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How do I get time of a Python program's execution?
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31 Answers
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Convert Elixir string to integer or float
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edited Jul 10 '18 at 13:06
Ronan Boiteau
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ans...
Determining complexity for recursive functions (Big O notation)
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362
The time complexity, in Big O notation, for each function:
int recursiveFun1(int n)
{
if ...