大约有 800 项符合查询结果（耗时：0.0086秒） [XML]
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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Detecting an undefined object property
...ut it won’t throw an error!
}
So unless you’re doing feature detection², where there’s uncertainty whether a given name will be in scope (like checking typeof module !== 'undefined' as a step in code specific to a CommonJS environment), typeof is a harmful choice when used on a variable, and...
How can I check if a string represents an int, without using try/except?
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note: u'²'.isdigit() is true but int(u'²') raises ValueError. Use u.isdecimal() instead. str.isdigit() is locale-dependent on Python 2.
– jfs
Oct 19 '14 at 6:02
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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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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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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...
How to convert a string to lower or upper case in Ruby
... ÁÂÃÀÇÉÊÍÓÔÕÚ".mb_chars.downcase.to_s
=> "string áâãàçéêíóôõú"
"string áâãàçéêíóôõú".mb_chars.upcase.to_s
=> "STRING ÁÂÃÀÇÉÊÍÓÔÕÚ"
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Inserting a tab character into text using C#
...b + "32"
TextBox2.Text = "Luc" + vbTab + "47"
TextBox3.Text = "François-Victor" + vbTab + "12"
End Sub
will display
as you can see, age value for François-Victor is shifted to the right and is not aligned with age value of two others TextBox.
SOLUTION
To solve this problem, you mus...
How can I add new keys to a dictionary?
...above which it's better to create a dict)
– Jean-François Fabre♦
Aug 1 '18 at 21:42
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