大约有 900 项符合查询结果（耗时：0.0069秒） [XML]
How do I create a copy of an object in PHP?
It appears that in PHP objects are passed by reference. Even assignment operators do not appear to be creating a copy of the Object.
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How can I obtain the element-wise logical NOT of a pandas Series?
... True]*10000)
In [10]: %timeit np.invert(s)
10000 loops, best of 3: 91.8 µs per loop
In [11]: %timeit ~s
10000 loops, best of 3: 73.5 µs per loop
In [12]: %timeit (-s)
10000 loops, best of 3: 73.5 µs per loop
As of Pandas 0.13.0, Series are no longer subclasses of numpy.ndarray; they are no...
How to list only top level directories in Python?
....walk timeit(os.walk(os.getcwd()).next()[1]) 1000 loops, best of 3: 734 µs per loop timeit(filter(os.path.isdir, os.listdir(os.getcwd()))) 1000 loops, best of 3: 477 µs per loop
– B.Kocis
May 18 '16 at 14:19
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How to set Sqlite3 to be case insensitive when string comparing?
...the ASCII range. For
example, the expression 'a' LIKE 'A'
is TRUE but 'æ' LIKE 'Æ' is FALSE.)."
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Do I need elements in persistence.xml?
...red Nov 22 '09 at 23:41
Mads MobækMads Mobæk
29.5k2020 gold badges6464 silver badges7575 bronze badges
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JavaScript “new Array(n)” and “Array.prototype.map” weirdness
...ered Mar 31 '11 at 14:45
David MårtenssonDavid Mårtensson
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Create Directory When Writing To File In Node.js
...-extra. If you don't want to install a package, please see Tiago Peres França's answer below.
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Python Infinity - Any caveats?
...ying system it was compiled on, so platform differences may occur. Recently¹, a fix has been applied that allows "infinity" as well as "inf", but that's of minor importance here.
The following sections equally well apply to any language that implements IEEE floating point arithmetic correctly, it ...
Selecting/excluding sets of columns in pandas [duplicate]
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It seems that the drop method is slightly faster (~515 µs vs ~680 µs), at least in some tests on a 15611 rows x 5 columns dataframe of which I wanted to drop 3 columns, in python 3.6 and pandas 0.20.3.
– bli
Nov 8 '17 at 17:12
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default select option as blank
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<td><b>Ação da atividade:</b><br>
<select style='align:left; width:100%;' id='cbxTipoSFA' name='cbxTipoSFA'>
<option hidden selected>Selecione uma opção</option>
<option value='Instalação'...