大约有 800 项符合查询结果（耗时：0.0073秒） [XML]
Pickle or json?
... answered Feb 13 '10 at 22:22
Håvard SHåvard S
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Convert a Python list with strings all to lowercase or uppercase
...3, map wins the race, but does nothing :)
– Jean-François Fabre♦
Mar 7 '18 at 19:22
@NedDeily map(str.lower,["A","B...
CSS '>' selector; what is it? [duplicate]
...ered Dec 16 '10 at 10:44
David MårtenssonDavid Mårtensson
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On design patterns: When should I use the singleton?
The glorified global variable - becomes a gloried global class. Some say breaking object-oriented design.
19 Answers
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How to convert a string of bytes into an int?
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@Naib, for os.urandom(4) bytes **1.4 µs**(struct) vs **2.3 µs**(int.from_bytes) on my cpu. python 3.5.2
– eri
Dec 26 '16 at 12:32
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Set a cookie to never expire
... edited Apr 10 '16 at 18:32
xiº
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answered Aug 28 '12 at 23:10
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Using numpy to build an array of all combinations of two arrays
...%timeit cartesian(([1, 2, 3], [4, 5], [6, 7]))
10000 loops, best of 3: 135 µs per loop
In [114]:
cartesian(([1, 2, 3], [4, 5], [6, 7]))
Out[114]:
array([[1, 4, 6],
[1, 4, 7],
[1, 5, 6],
[1, 5, 7],
[2, 4, 6],
[2, 4, 7],
[2, 5, 6],
[2, 5, 7],
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How do you reverse a string in place in C or C++?
...it, nor the patience to use a hexeditor)
Examples:
$ ./strrev Räksmörgås ░▒▓○◔◑◕●
░▒▓○◔◑◕● ●◕◑◔○▓▒░
Räksmörgås sågrömskäR
./strrev verrts/.
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How to calculate a logistic sigmoid function in Python?
...op
In [7]: %timeit -r 1 logistic.cdf(0.458)
10000 loops, best of 1: 72.2 µs per loop
In [8]: %timeit -r 1 expit(0.458)
100000 loops, best of 1: 2.98 µs per loop
As expected logistic.cdf is (much) slower than expit. expit is still slower than the python sigmoid function when called with a sing...
Difference between datetime and timestamp in sqlserver? [duplicate]
What is the difference between Timestamp and Datetime SQL Server?
2 Answers
2
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