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Repeat each row of data.frame the number of times specified in a column
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Here's one solution:
df.expanded <- df[rep(row.names(df), df$freq), 1:2]
Result:
var1 var2
1 a d
2 b e
2.1 b e
3 c f
3.1 c f
3.2 c f
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py2exe - generate single executable file
I thought I heard that py2exe was able to do this, but I never figured it out. Has anyone successfully done this? Can I see your setup.py file, and what command line options you used?
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Deleting lines from one file which are in another file
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grep -v -x -f f2 f1 should do the trick.
Explanation:
-v to select non-matching lines
-x to match whole lines only
-f f2 to get patterns from f2
One can instead use grep -F or fgrep to match fixed strings from f2 rather than patterns (...
Working with huge files in VIM
I tried opening a huge (~2GB) file in VIM but it choked. I don't actually need to edit the file, just jump around efficiently.
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How to dynamically compose an OR query filter in Django?
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162
You could chain your queries as follows:
values = [1,2,3]
# Turn list of values into list of Q...
Can C++ code be valid in both C++03 and C++11 but do different things?
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285
The answer is a definite yes. On the plus side there is:
Code that previously implicitly copi...
Multiply TimeSpan in .NET
...= TimeSpan.FromMinutes(1);
duration = TimeSpan.FromTicks(duration.Ticks * 12);
Console.WriteLine(duration);
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Properties vs Methods
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152
From the Choosing Between Properties and Methods section of Design Guidelines for Developing Cla...
WCF chokes on properties with no “set ”. Any workaround?
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edited Feb 24 '10 at 2:45
answered Feb 24 '10 at 2:34
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NumPy: function for simultaneous max() and min()
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