大约有 15,482 项符合查询结果（耗时：0.0266秒） [XML]
Why CancellationToken is separate from CancellationTokenSource?
...rds the cancellation to all the tokens it has issued.
This great for unit testing BTW - create your own cancellation token source, get a token, call Cancel on the source, and pass the token to your code that has to handle the cancellation.
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How to make asynchronous HTTP requests in PHP
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In my testing, using exec("curl $url > /dev/null 2>&1 &"); is one of the fastest solutions here. It's immensely faster (1.9s for 100 iterations) than the post_without_wait() function (14.8s) in the "accepted" answer ...
Check if any ancestor has a class using jQuery
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I might venture to say (without testing this) that this method is better. Elem.parents will traverse the entire parent dom strucutre, where closest() should (probably) stop once it finds the nearest parent with that element and is therefore more efficient. ...
Access-control-allow-origin with multiple domains
...hink it should work. I specified the IIS 8.5 version because it is where i tested it.
– Paco Zarate
Jul 7 '15 at 7:47
4
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Pandas aggregate count distinct
... already given, the solution using the string "nunique" seems much faster, tested here on ~21M rows dataframe, then grouped to ~2M
%time _=g.agg({"id": lambda x: x.nunique()})
CPU times: user 3min 3s, sys: 2.94 s, total: 3min 6s
Wall time: 3min 20s
%time _=g.agg({"id": pd.Series.nunique})
CPU tim...
What is the cleanest way to get the progress of JQuery ajax request?
...this" for the uploadProgress callback (maybe the same for progress but not tested) as it is done for all the standard promises for jqXHR. So you will need to pass the context in a closure.
– frank
Mar 13 '16 at 22:07
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What is the correct way to document a **kwargs parameter?
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Google Style docstrings parsed by Sphinx
Disclaimer: not tested.
From this cutout of the sphinx docstring example, the *args and **kwargs are left unexpanded:
def module_level_function(param1, param2=None, *args, **kwargs):
"""
...
Args:
param1 (int): The fir...
To find whether a column exists in data frame or not
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You could also use if(!is.null(abcframe$d)) to test whether d exists in abcframe.
dat <- data.frame(a = 1:2, b = 2:3, c = 4:5)
if (!is.null(dat$d)) {
print("d exists")
} else {
print("d does not exist")
}
if (!is.null(dat$a)) {
print("a exists")
} else {
prin...
What is the best way to programmatically detect porn images? [closed]
..._percent)
This code measures skin tones in the center of the image. I've tested on 20 relatively tame "porn" images and 20 completely innocent images. It flags 100% of the "porn" and 4 out of the 20 of the clean images. That's a pretty high false positive rate but the script aims to be fairly caut...
Difference between modes a, a+, w, w+, and r+ in built-in open function?
...re out why you would use mode 'w+' versus 'w'. In the end, I just did some testing. I don't see much purpose for mode 'w+', as in both cases, the file is truncated t