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What is the difference between HashSet and List?

Can you explain what is the difference between HashSet<T> and List<T> in .NET? 8 Answers ...
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Why doesn't Java allow to throw a checked exception from static initialization block?

Why doesn't Java allow to throw a checked exception from a static initialization block? What was the reason behind this design decision? ...
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When to use Storyboard and when to use XIBs

Are there any guidelines on when to use storyboards in an iOS project and when to use XIBs? what are the pros and cons of each and what situations do they each suit? ...
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MVC Razor view nested foreach's model

Imagine a common scenario, this is a simpler version of what I'm coming across. I actually have a couple of layers of further nesting on mine.... ...
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A semantics for Bash scripts?

More than any other language I know, I've "learned" Bash by Googling every time I need some little thing. Consequently, I can patchwork together little scripts that appear to work. However, I don't really know what's going on, and I was hoping for a more formal introduction to Bash as a programmin...
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Why would a JavaScript variable start with a dollar sign? [duplicate]

I quite often see JavaScript with variables that start with a dollar sign. When/why would you choose to prefix a variable in this way? ...
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Is the != check thread safe?

I know that compound operations such as i++ are not thread safe as they involve multiple operations. 8 Answers ...
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What is a None value?

I have been studying Python, and I read a chapter which describes the None value, but unfortunately this book isn't very clear at some points. I thought that I would find the answer to my question, if I share it there. ...
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Pandas: drop a level from a multi-level column index?

If I've got a multi-level column index: 7 Answers 7 ...
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Lambda function in list comprehensions

...output of the following two list comprehensions different, even though f and the lambda function are the same? 6 Answer...