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Can I use non existing CSS classes?

...our case the "target" class does in fact exist on those specific elements, and your markup is perfectly valid as it is. This doesn't necessarily mean that you need to have a class declared in the HTML before you can use it in CSS either. See ruakh's comment. Whether or not a selector is valid depen...
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What does the 'static' keyword do in a class?

...n the example given, main does not know which instance of the Hello class (and therefore which instance of the Clock class) it should refer to. static members can only refer to static members. Instance members can, of course access static members. Side note: Of course, static members can access ins...
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Removing first x characters from string?

...if one had a string lipsum , how would they remove the first 3 characters and get a result of sum ? 5 Answers ...
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What is the best (idiomatic) way to check the type of a Python variable? [duplicate]

...scussion. What are its advantages? Can we see some example code, to understand how it compares? The ABC PEP link is rather heavy with theory and quite a lot to consume when the goal is to simply test if something is a dict or string. Is there additional effort to implement ABCs, and (especially for ...
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Nested Git repositories?

... As a relative git beginner, I found this blog/tutorial easier to understand chrisjean.com/2009/04/20/… It takes a simpler approach by focusing on just git instead of having the context of a helper shell script; I found it easier to read. – John K May 16 '1...
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Returning first x items from array

...his case it is unrelated to the order. it is just about the first 5 items. and you can't use array_slice here. – ESCOBAR Jun 10 '14 at 16:20 2 ...
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Should arrays be used in C++?

Since std::list and std::vector exist, is there a reason to use traditional C arrays in C++, or should they be avoided, just like malloc ? ...
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C# Lambda expressions: Why should I use them?

... Lambda expressions are a simpler syntax for anonymous delegates and can be used everywhere an anonymous delegate can be used. However, the opposite is not true; lambda expressions can be converted to expression trees which allows for a lot of the magic like LINQ to SQL. The following ...
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How to unescape HTML character entities in Java?

Basically I would like to decode a given Html document, and replace all special chars, such as " " -> " " , ">" -> ">" . ...
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Convert Pixels to Points

...out the topic, but can't seem to locate a simple formula. Let's assume a standard 96dpi, how do I calulate this conversion? ...