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C++ preprocessor __VA_ARGS__ number of arguments
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12 Answers
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how to rotate a bitmap 90 degrees
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256
You can also try this one
Matrix matrix = new Matrix();
matrix.postRotate(90);
Bitmap scale...
ValueError: setting an array element with a sequence
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260
From the code you showed us, the only thing we can tell is that you are trying to create an ar...
Installing Google Protocol Buffers on mac
...uld like to install the older version of Google Protocol Buffers (protobuf-2.4.1) on mac using Terminal command line. I tried with brew install protobuf , but the latest version 2.5.0 has been installed. Is it possible to install the older version from terminal.
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How to sort git tags by version string order of form rc-X.Y.Z.W?
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Use version sort
git tag -l | sort -V
or for git version >= 2.0
git tag -l --sort=v:refname
git tag -l --sort=-v:refname # reverse
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How do you downgrade rubygems?
I have rubygems 1.3.1 installed but I want to go back to 1.2.0. What's the command to downgrade rubygems?
6 Answers
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How do I replace NA values with zeros in an R dataframe?
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21 Answers
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pytest: assert almost equal
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I noticed that this question specifically asked about py.test. py.test 3.0 includes an approx(...
What is the most efficient way to create a dictionary of two pandas Dataframe columns?
...: pd.Series(df.Letter.values,index=df.Position).to_dict()
Out[9]: {1: 'a', 2: 'b', 3: 'c', 4: 'd', 5: 'e'}
Speed comparion (using Wouter's method)
In [6]: df = pd.DataFrame(randint(0,10,10000).reshape(5000,2),columns=list('AB'))
In [7]: %timeit dict(zip(df.A,df.B))
1000 loops, best of 3: 1.27 ms...