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Non-type template parameters

I understand that the non-type template parameter should be a constant integral expression. Can someone shed light why is it so ? ...
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What's the difference between size_t and int in C++?

In several C++ examples I see a use of the type size_t where I would have used a simple int . What's the difference, and why size_t should be better? ...
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Can the C# interactive window interact with my code?

In Visual Studio 2015 or later, I can open the 'C# interactive window', and run code: 5 Answers ...
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Why do results vary based on curly brace placement?

Why do the code snippets below, taken from this article , produce different results due to only a single change in the placement of curly braces? ...
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Postgres manually alter sequence

I'm trying to set a sequence to a specific value. 5 Answers 5 ...
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How to attach debugger to iOS app after launch?

I have an issue I am troubleshooting which occurs very infrequently and doesn't seem to happen when I have things running under Xcode. ...
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How to set 'auto' for upper limit, but keep a fixed lower limit with matplotlib.pyplot

...d 'auto' and 'autorange', but those don't seem to work. Thank you in advance. 5 Answers ...
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Nested attributes unpermitted parameters

I have a Bill object, which has many Due objects. The Due object also belongs to a Person . I want a form that can create the Bill and its children Dues all in one page. I am trying to create a form using nested attributes, similar to ones in this Railscast . ...
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Is onload equal to readyState==4 in XMLHttpRequest?

I am confuse about the xhr return event, as I can tell, there are not so much different between onreadystatechange --> readyState == 4 and onload, is it true? ...
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Where's the difference between setObject:forKey: and setValue:forKey: in NSMutableDictionary?

When looking at the documentation, I hardly see any big difference. Both "value" and "object" are of type id , so can be any object. Key is once a string, and in the other case an id. One of them seems to retain the object, and the other don't. What else? Which one is for what case? ...