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When should I use the Visitor Design Pattern? [closed]

I keep seeing references to the visitor pattern in blogs but I've got to admit, I just don't get it. I read the wikipedia article for the pattern and I understand its mechanics but I'm still confused as to when I'd use it. ...
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Different floating point result with optimization enabled - compiler bug?

The below code works on Visual Studio 2008 with and without optimization. But it only works on g++ without optimization (O0). ...
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How to get my IP address programmatically on iOS/macOS?

I would like to obtain my iPad's IP address programmatically. How can I query the networking subsystem to find out what my IPv4 (and IPv6) addresses are? ...
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Casting vs using the 'as' keyword in the CLR

When programming interfaces, I've found I'm doing a lot of casting or object type conversion. 18 Answers ...
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Who architected / designed C++'s IOStreams, and would it still be considered well-designed by today'

First off, it may seem that I'm asking for subjective opinions, but that's not what I'm after. I'd love to hear some well-grounded arguments on this topic. ...
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What is the difference between C, C99, ANSI C and GNU C?

I have started programming practice on codechef and have been confused by the difference between C and C99. What does C mean here? Is it C89? Check the languages at the bottom of this submit . It contains both C and C99. ...
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Task vs Thread differences [duplicate]

I'm new to parallel programming. There are two classes available in .NET: Task and Thread . 4 Answers ...
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What is Type-safe?

What does "type-safe" mean? 12 Answers 12 ...
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Why is using a wild card with a Java import statement bad?

It is much more convenient and cleaner to use a single statement like 15 Answers 15 ...
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Is a successor for TeX/LaTeX in sight? [closed]

TeX/LaTeX is great, I use it in many ways. Some of its advantages are: 26 Answers 26 ...