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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...
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...
Multiple levels of 'collection.defaultdict' in Python
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347
Use:
from collections import defaultdict
d = defaultdict(lambda: defaultdict(int))
This wil...
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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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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Can anybody push to my project on github?
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3 Answers
3
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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...
“Ago” date/time functions in Ruby/Rails
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3 Answers
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Is it possible to use JS to open an HTML select to show its option list? [duplicate]
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edited Jul 10 '18 at 10:31
answered Jan 10 '09 at 0:20
Ga...