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Convert pandas dataframe to NumPy array
...c'])
df.to_numpy()
array([[1, 4],
[2, 5],
[3, 6]])
As mentioned above, this method is also defined on Index and Series objects (see here).
df.index.to_numpy()
# array(['a', 'b', 'c'], dtype=object)
df['A'].to_numpy()
# array([1, 2, 3])
By default, a view is returned, so any modifi...
How to determine programmatically whether a particular process is 32-bit or 64-bit
...
One of the more interesting ways I've seen is this:
if (IntPtr.Size == 4)
{
// 32-bit
}
else if (IntPtr.Size == 8)
{
// 64-bit
}
else
{
// The future is now!
}
To find out if OTHER processes are running in the ...
What are the relative strengths and weaknesses of Git, Mercurial, and Bazaar? [closed]
...by its development team. It has a pluggable architecture for different components, and replaces its storage format frequently; this allows them to introduce new features (such as better support for integration with revision control systems based on different concepts) and improve performance. The Ba...
Gulp command not found after install
...ackOverflow doesn't show this as the first answer! Clearly its the correct one.
– Anand Sainath
Apr 18 '18 at 2:05
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show 2 more comments
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What is fastest children() or find() in jQuery?
To select a child node in jQuery one can use children() but also find().
6 Answers
6
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Virtual functions and performance - C++
...hese vectors (small enough to fit in L1) and ran a loop that added them to one another (A.x = B.x + C.x) 1000 times. I ran this with the functions defined as inline, virtual, and regular function calls. Here are the results:
inline: 8ms (0.65ns per call)
direct: 68ms (5.53ns per call)
virtual...
Following git-flow how should you handle a hotfix of an earlier release?
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One should do a release on the hot fix, right? How can we do that?
– Ravindranath Akila
Jun 14 '17 at 7:30
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How do I profile memory usage in Python?
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This one has been answered already here: Python memory profiler
Basically you do something like that (cited from Guppy-PE):
>>> from guppy import hpy; h=hpy()
>>> h.heap()
Partition of a set of 48477 objects. T...
Why is a C++ Vector called a Vector?
...
@Joseph Garvin: Vectors don't even need to have components that are numbers. For example, certain sets of functions can be used to form vector spaces where the components are functions.
– jason
Sep 15 '09 at 20:56
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Trying to add adb to PATH variable OSX
...e reason adb does not want to be found. This is very frustrating. Has anyone else had this problem before?
14 Answers
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