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How to delete migration files in Rails 3
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Chris Frederick
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answered Oct 6 '10 at 16:56
Fábio BatistaFábio B...
Calculate difference between two datetimes in MySQL
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3 Answers
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Remove rows with duplicate indices (Pandas DataFrame and TimeSeries)
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I would suggest using the duplicated method on the Pandas Index itself:
df3 = df3[~df3.index.duplicated(keep='first')]
While all the other methods work, the currently accepted answer is by far the least performant for the provided example. Furthermore, while the groupby method is only slightly les...
Why should we NOT use sys.setdefaultencoding(“utf-8”) in a py script?
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143
As per the documentation: This allows you to switch from the default ASCII to other encodings su...
Multiple levels of 'collection.defaultdict' in Python
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347
Use:
from collections import defaultdict
d = defaultdict(lambda: defaultdict(int))
This wil...
Check if value exists in Postgres array
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337
Simpler with the ANY construct:
SELECT value_variable = ANY ('{1,2,3}'::int[])
The right op...
Check if a JavaScript string is a URL
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32 Answers
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UnicodeDecodeError: 'ascii' codec can't decode byte 0xe2 in position 13: ordinal not in range(128)
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135
The file is being read as a bunch of strs, but it should be unicodes. Python tries to implicitl...
How to expand/collapse a diff sections in Vimdiff?
...e expand/collapse a diff section, have full file expansion/only diffs with 3 context lines above or below, etc.). I currently know only the following commands :
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Can anybody push to my project on github?
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3 Answers
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