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Pandas: create two new columns in a dataframe with values calculated from a pre-existing column
...zed operations.
%timeit df['A1'], df['A2'] = df['a'] ** 2, df['a'] ** 3
5.13 ms ± 320 µs per loop (mean ± std. dev. of 7 runs, 100 loops each)
This takes advantage of NumPy's extremely fast vectorized operations instead of our loops. We now have a 30x speedup over the original.
The simplest...
How to show and update echo on same line
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Just a note for the future: printf will do exactly the same thing, without any options. The advantage is printf generally behaves similarly...
How to download/checkout a project from Google Code in Windows?
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213
If you don't want to install anything but do want to download an SVN or GIT repository, then yo...
Generic Repository With EF 4.1 what is the point
...in both SL and WPF.
– h.alex
Feb 9 '13 at 21:35
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show 6 m...
Is it OK to use Gson instance as a static field in a model bean (reuse)?
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134
It seems just fine to me. There is nothing in the GSON instance that makes it related to a spe...
How can javascript upload a blob?
...AJAX too?
– William Entriken
Aug 7 '13 at 2:05
@FullDecent What do you mean? To prompt the user to download a file usi...
Repeater, ListView, DataList, DataGrid, GridView … Which to choose?
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WebDudeWebDude
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MySQL Multiple Joins in one query?
...95 4.66231C43.6264 4.66231 43.1481 5.28821 43.1481 6.59048V11.9512C43.1481 13.2535 43.6264 13.8962 44.6595 13.8962C45.6924 13.8962 46.1709 13.2535 46.1709 11.9512V9.17788Z\"/\u003e\u003cpath d=\"M32.492 10.1419C32.492 12.6954 34.1182 14.0484 37.0451 14.0484C39.9723 14.0484 41.5985 12.6954 41.5985 10...
Soft wrap at 80 characters in Vim in window of arbitrary width
... is too wide.
– gravitation
Feb 16 '13 at 0:24
This works, but it isn't sticky. I guess the next step is to setup an a...
How to create a temporary directory?
...t;prefix>
– Heath Borders
Oct 3 '13 at 14:24
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This is a OS X vs Linux thing. See this quest...