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Best way to iterate through a Perl array
...he array elements occurs. ($_ is aliased to the element in #1, but #2 and #3 actually copy the scalars from the array.)
#5 might be similar.
In terms memory usage: They're all the same except for #5.
for (@a) is special-cased to avoid flattening the array. The loop iterates over the indexes of the...
Finding the direction of scrolling in a UIScrollView?
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Linear Regression and group by in R
...e ~ year | state, data = d)
Coefficients:
(Intercept) year
CA -1.34420990 0.17139963
NY 0.00196176 -0.01852429
Degrees of freedom: 20 total; 16 residual
Residual standard error: 0.8201316
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How to run a python script from IDLE interactive shell?
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Python3:
exec(open('helloworld.py').read())
If your file not in the same dir:
exec(open('./app/filename.py').read())
See https://stackoverflow.com/a/437857/739577 for passing global/local variables.
In deprecated Python ve...
Changing a specific column name in pandas DataFrame
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362
A one liner does exist:
In [27]: df=df.rename(columns = {'two':'new_name'})
In [28]: df
Out[...
What does ** (double star/asterisk) and * (star/asterisk) do for parameters?
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2343
The *args and **kwargs is a common idiom to allow arbitrary number of arguments to functions a...
Using Java with Nvidia GPUs (CUDA)
..., consider a matrix multiplication: The number of instructions will be O(n^3) when n is the size of the matrix. In this case, one can expect that the GPU will outperform a CPU at a certain matrix size. Another example could be when many complex trigonometric computations (sine/cosine etc) are perfor...
Round a Floating Point Number Down to the Nearest Integer?
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answered Jun 17 '13 at 7:51
MakaveliMakaveli
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Are GUID collisions possible?
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edited Dec 22 '13 at 3:31
Robert Harvey
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Comment Inheritance for C# (actually any language)
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Neuron
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answered Dec 5 '08 at 5:15
James CurranJames ...