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What is the most efficient way of finding all the factors of a number in Python?
...n to me an efficient way of finding all the factors of a number in Python (2.7)?
22 Answers
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How do I sort one vector based on values of another
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answered Oct 14 '09 at 21:47
Ian FellowsIan Fellows
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What is the bower (and npm) version syntax?
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342
In a nutshell, the syntax for Bower version numbers (and NPM's) is called SemVer, which is short...
How can I check if multiplying two numbers in Java will cause an overflow?
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92
Java 8 has Math.multiplyExact, Math.addExact etc. for ints and long. These throw an unchecked Ar...
pandas: filter rows of DataFrame with operator chaining
...olean index.
In [96]: df
Out[96]:
A B C D
a 1 4 9 1
b 4 5 0 2
c 5 5 1 0
d 1 3 9 6
In [99]: df[(df.A == 1) & (df.D == 6)]
Out[99]:
A B C D
d 1 3 9 6
If you want to chain methods, you can add your own mask method and use that one.
In [90]: def mask(df, key, val...
Getting distance between two points based on latitude/longitude
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215
Edit: Just as a note, if you just need a quick and easy way of finding the distance between tw...
Selecting pandas column by location
... to mind:
>>> df
A B C D
0 0.424634 1.716633 0.282734 2.086944
1 -1.325816 2.056277 2.583704 -0.776403
2 1.457809 -0.407279 -1.560583 -1.316246
3 -0.757134 -1.321025 1.325853 -2.513373
4 1.366180 -1.265185 -2.184617 0.881514
>>> df.iloc[...
项目管理实践教程二、源代码控制【Source Control Using VisualSVN Server ...
...作；另外，用户权限的管理也是通过图像界面来配置。
2.为什么不用TFS?
回答:
因为我们一开始就是用Subversion和TortioseSVN,所以就没有更换其他的软件。至于TFS至今没有用过，其实，我只是看了一些的文章而已，对它也不了解。
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How to sort a list of lists by a specific index of the inner list?
...;>> from operator import itemgetter
>>> L=[[0, 1, 'f'], [4, 2, 't'], [9, 4, 'afsd']]
>>> sorted(L, key=itemgetter(2))
[[9, 4, 'afsd'], [0, 1, 'f'], [4, 2, 't']]
It is also possible to use a lambda function here, however the lambda function is slower in this simple case
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How to find time complexity of an algorithm
...de any simplifying constant factor.
For example, lets see how we simplify 2N + 2 machine instructions to describe this as just O(N).
Why do we remove the two 2s ?
We are interested in the performance of the algorithm as N becomes large.
Consider the two terms 2N and 2.
What is the relative inf...