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Differences between cookies and sessions?

... in web developement and am learning about JSP & Servlets . I have some knowledge of HttpSession - I have used it in some of my sample projects. ...
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Is int[] a reference type or a value type?

I know an int is a value type, but what are arrays of value types? Reference types? Value types? I want to pass an array to a function to check something. Should I just pass the array, as it will just pass the reference of it, or should I pass it as ref? ...
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C++ equivalent of StringBuffer/StringBuilder?

...ring or std::stringstream if after profiling your code you discover this makes an improvement. I normally use either std::string or std::stringstream. I have never had any problems with these. I would normally reserve some room first if I know the rough size of the string in advance. I have seen...
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Correct way to populate an Array with a Range in Ruby

I am working through a book which gives examples of Ranges being converted to equivalent arrays using their "to_a" methods ...
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How to convert index of a pandas dataframe into a column?

...ce=True) so, if you have a multi-index frame with 3 levels of index, like: >>> df val tick tag obs 2016-02-26 C 2 0.0139 2016-02-27 A 2 0.5577 2016-02-28 C 6 0.0303 and you want to convert the 1st (tick) and 3rd (obs) levels in the ...
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A monad is just a monoid in the category of endofunctors, what's the problem?

...ler. The original quote is from Saunders Mac Lane in Categories for the Working Mathematician, one of the foundational texts of Category Theory. Here it is in context, which is probably the best place to learn exactly what it means. But, I'll take a stab. The original sentence is this: All told, a ...
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How can I get the source code of a Python function?

... Rafał DowgirdRafał Dowgird 36.7k1010 gold badges7272 silver badges8989 bronze badges ...
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How to send a JSON object over Request with Android?

...der writing a test program to send various strings to the server until you know what format it needs to be in. int TIMEOUT_MILLISEC = 10000; // = 10 seconds String postMessage="{}"; //HERE_YOUR_POST_STRING. HttpParams httpParams = new BasicHttpParams(); HttpConnectionParams.setConnectionTimeout(ht...
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Path.Combine absolute with relative path strings

... What Works: string relativePath = "..\\bling.txt"; string baseDirectory = "C:\\blah\\"; string absolutePath = Path.GetFullPath(baseDirectory + relativePath); (result: absolutePath="C:\bling.txt") What doesn't work string relati...
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How To Test if Type is Primitive

I have a block of code that serializes a type into a Html tag. 12 Answers 12 ...