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Oracle Differences between NVL and Coalesce
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answered Jun 4 '09 at 12:03
QuassnoiQuassnoi
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Sorting arrays in NumPy by column
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147
@steve's answer is actually the most elegant way of doing it.
For the "correct" way see the or...
python pandas: Remove duplicates by columns A, keeping the row with the highest value in column B
...drop_duplicates(subset='A', keep="last")
Out[10]:
A B
1 1 20
3 2 40
4 3 10
You can do also something like:
In [12]: df.groupby('A', group_keys=False).apply(lambda x: x.loc[x.B.idxmax()])
Out[12]:
A B
A
1 1 20
2 2 40
3 3 10
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SecItemAdd and SecItemCopyMatching returns error code -34018 (errSecMissingEntitlement)
...vice from Xcode I would try to access the keychain but fail due to error -34018. This doesn't match any of the documented keychain error codes and can't be consistently reproduced. (happens maybe 30% of the time, and it's not clear to me why it happens). What makes debugging this problem very diffic...
What is the best way to compute trending topics or tags?
Many sites offer some statistics like "The hottest topics in the last 24h". For example, Topix.com shows this in its section "News Trends". There, you can see the topics which have the fastest growing number of mentions.
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How to install XNA game studio on Visual Studio 2012?
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4 Answers
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Java: Calling a super method which calls an overridden method
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edited Oct 2 '14 at 11:45
answered Jan 4 '11 at 16:11
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How do I get PyLint to recognize numpy members?
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edited Sep 14 '16 at 22:49
answered Sep 14 '16 at 22:43
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virtualenvwrapper and Python 3
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unutbuunutbu
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Random Gaussian Variables
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edited Jan 30 '17 at 14:58
answered Oct 20 '08 at 14:16
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