大约有 40,000 项符合查询结果(耗时:0.0564秒) [XML]

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Pandas aggregate count distinct

...000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 47.1084 7.58816C47.4091 7.46349 47.7169 7.36433 48.0099 7.26993C48.9099 6.97997 49.672 6.73443 49.672 5.93063C49.672 5.22043 48.9832 4.61182 48.1414 4.61182C47.4335 4.61182 46.7256 4.91628 46.0943 5.50789C45.7307 4.9328 4...
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Algorithm to detect corners of paper sheet in photo

...n are awesome, move to them as soon as possible. :D Instead of removing small objects and or noise, lower the canny restraints, so it accepts more edges, and then find the largest closed contour (in OpenCV use findcontour() with some simple parameters, I think I used CV_RETR_LIST). might still stru...
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What techniques can be used to speed up C++ compilation times?

...ity that takes advantage of caching techniques to speed things up. Use Parallelism Many compilers / IDEs support using multiple cores/CPUs to do compilation simultaneously. In GNU Make (usually used with GCC), use the -j [N] option. In Visual Studio, there's an option under preferences to allow it...
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Getter and Setter declaration in .NET [duplicate]

... a plain field: public string MyField But this field can be accessed by all outside users of your class. People can insert illegal values or change the value in ways you didn't expect. By using a property, you can encapsulate the way your data is accessed. C# has a nice syntax for turning a fiel...
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Highlight label if checkbox is checked

...Mar 11 '11 at 17:07 Andrew MarshallAndrew Marshall 87.3k1818 gold badges202202 silver badges204204 bronze badges ...
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Testing two JSON objects for equality ignoring child order in Java

...ary that supports comparing two JSON objects ignoring child order, specifically for unit testing JSON returning from a web service. ...
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“ImportError: No module named” when trying to run Python script

...the notebook to operate from in your ipython_notebook_config.py file (typically using the c.NotebookManager.notebook_dir setting). The solution is to provide the python interpreter with the path-to-your-module. The simplest solution is to append that path to your sys.path list. In your notebook, fi...
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Removing packages installed with go get

... I needed to set my GOPATH otherwise that package sullies my root Go install (I would much prefer to keep my Go install clean and separate core from custom). How do I remove packages installed previously? ...
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How does Stack Overflow generate its SEO-friendly URLs?

...I benchmarked it). I figured I'd optimize it because this function can be called hundreds of times per page. /// <summary> /// Produces optional, URL-friendly version of a title, "like-this-one". /// hand-tuned for speed, reflects performance refactoring contributed /// by John Gietzen (user...
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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

... A static variable shares the value of it among all instances of the class. Example without declaring it static: public class Variable { public int i = 5; public void test() { i = i + 5; Console.WriteLine(i); } } public class Exercise { ...