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Calculate difference between two datetimes in MySQL
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3 Answers
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Multiple levels of 'collection.defaultdict' in Python
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347
Use:
from collections import defaultdict
d = defaultdict(lambda: defaultdict(int))
This wil...
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...
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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How to delete migration files in Rails 3
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Chris Frederick
5,00033 gold badges3232 silver badges3939 bronze badges
answered Oct 6 '10 at 16:56
Fábio BatistaFábio B...
Check if a JavaScript string is a URL
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32 Answers
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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...
Can anybody push to my project on github?
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3 Answers
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Difference between dispatch_async and dispatch_sync on serial queue?
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3 Answers
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“Ago” date/time functions in Ruby/Rails
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3 Answers
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