大约有 40,000 项符合查询结果(耗时:0.0536秒) [XML]

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Is there a way for multiple processes to share a listening socket?

In socket programming, you create a listening socket and then for each client that connects, you get a normal stream socket that you can use to handle the client's request. The OS manages the queue of incoming connections behind the scenes. ...
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What is the use of static variable in C#? When to use it? Why can't I declare the static variable in

I have searched about static variables in C#, but I am still not getting what its use is. Also, if I try to declare the variable inside the method it will not give me the permission to do this. Why? ...
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How to take column-slices of dataframe in pandas

I load some machine learning data from a CSV file. The first 2 columns are observations and the remaining columns are features. ...
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Combine two data frames by rows (rbind) when they have different sets of columns

Is it possible to row bind two data frames that don't have the same set of columns? I am hoping to retain the columns that do not match after the bind. ...
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How do I Geocode 20 addresses without receiving an OVER_QUERY_LIMIT response?

Using the Google Geocoder v3, if I try to geocode 20 addresses, I get an OVER_QUERY_LIMIT unless I time them to be ~1 second apart, but then it takes 20 seconds before my markers are all placed. ...
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unsigned int vs. size_t

I notice that modern C and C++ code seems to use size_t instead of int / unsigned int pretty much everywhere - from parameters for C string functions to the STL. I am curious as to the reason for this and the benefits it brings. ...
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R: += (plus equals) and ++ (plus plus) equivalent from c++/c#/java, etc.?

Does R have a concept of += (plus equals) or ++ (plus plus) as c++/c#/others do? 8 Answers ...
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How do I parse a URL query parameters, in Javascript? [duplicate]

In Javascript, how can I get the parameters of a URL string (not the current URL)? 2 Answers ...
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How to check Django version

I have to use Python and Django for our application. So I have two versions of Python, 2.6 and 2.7. Now I have installed Django. I could run the sample application for testing Django succesfuly. But how do I make sure whether Django uses the 2.6 or 2.7 version and what version of modules Django ...
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Get encoding of a file in Windows

This isn't really a programming question, is there a command line or Windows tool (Windows 7) to get the current encoding of a text file? Sure I can write a little C# app but I wanted to know if there is something already built in? ...