大约有 47,000 项符合查询结果（耗时：0.0368秒） [XML]
Determine if map contains a value for a key?
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answered Jun 28 '10 at 22:14
AlanAlan
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Python element-wise tuple operations like sum
...pted?
– Marc Cenedella
Jul 1 '13 at 22:49
15
it's good, but technically not what's asked for beca...
Difference between `const shared_ptr` and `shared_ptr`?
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edited Jul 22 '13 at 17:15
answered Jul 22 '13 at 17:10
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Generate a random letter in Python
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answered May 12 '10 at 22:51
Mark RushakoffMark Rushakoff
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Stop node.js program from command line
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BradBrad
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How do I use JDK 7 on Mac OSX?
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answered Oct 20 '11 at 22:22
vectorsizevectorsize
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How to join multiple lines of file names into one with custom delimiter?
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22 Answers
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Active
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How to determine whether a Pandas Column contains a particular value
...s:
In [21]: s.unique()
Out[21]: array(['a', 'b', 'c'], dtype=object)
In [22]: 'a' in s.unique()
Out[22]: True
or a python set:
In [23]: set(s)
Out[23]: {'a', 'b', 'c'}
In [24]: 'a' in set(s)
Out[24]: True
As pointed out by @DSM, it may be more efficient (especially if you're just doing this ...
What is the purpose of XORing a register with itself? [duplicate]
...all with eax.
– kquinn
Sep 8 '09 at 22:16
1
Actually, in the big picture it's faster. There are ...
Django select only rows with duplicate field values
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edited Jan 22 '17 at 22:27
John Mee
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