大约有 47,000 项符合查询结果（耗时：0.0485秒） [XML]
Count with IF condition in MySQL query
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answered Mar 21 '12 at 5:15
user319198user319198
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How to enumerate a range of numbers starting at 1
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answered Jul 21 '10 at 20:41
Mark ByersMark Byers
683k155155 gold badges14681468 silver badges13881388 bronze badges
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Multiple aggregations of the same column using pandas GroupBy.agg()
...y
1 0.036901 0.369012
or as a dictionary:
In [21]: df.groupby('dummy').agg({'returns':
{'Mean': np.mean, 'Sum': np.sum}})
Out[21]:
returns
Mean Sum
dummy
1 0.036901 0.369012
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Selecting data frame rows based on partial string match in a column
...rep
– Stephan Kolassa
Oct 24 '12 at 21:56
1
The %like% suggestion is great! I recommend putting i...
Can I assume (bool)true == (int)1 for any C++ compiler?
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edited Apr 27 '10 at 21:14
Joe
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answered...
Is MATLAB OOP slow or am I doing something wrong?
... 0.02261 sec 0.23 usec per call
nop1-5() functions: 0.02182 sec 0.22 usec per call
nop() subfunction: 0.02244 sec 0.22 usec per call
@()[] anonymous function: 0.08461 sec 0.85 usec per call
nop(obj) method: 0.24664 sec 2.47 usec per call
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Given an array of numbers, return array of products of all other numbers (no division)
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answered Apr 21 '10 at 6:09
Michael AndersonMichael Anderson
57.2k77 gold badges110110 silver badges159159 bronze badges
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How to replace an entire line in a text file by line number
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edited Jun 21 '12 at 19:39
answered Jun 21 '12 at 19:26
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What regex will match every character except comma ',' or semi-colon ';'?
...p meets end of file
– Jaswinder
Dec 21 '17 at 3:07
I had a similar requirement where I want to avoid semicolon and com...
How to extract text from a string using sed?
...hole line.
– tripleee
Jul 19 '12 at 21:01
1
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