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Can I use non existing CSS classes?

... of rules for handling parsing errors, none of which concern the markup at all. Essentially, this means HTML and CSS are completely independent of each other in the validity aspect.1 Once you understand that, it becomes clear that there is no side effect of not defining a .target rule in your style...
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How can I check MySQL engine type for a specific table?

... database contains several tables using different storage engines (specifically myisam and innodb). How can I find out which tables are using which engine? ...
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Uses for Optional

...tween wanting to use it everywhere something may be null , and nowhere at all. 14 Answers ...
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How much faster is C++ than C#?

... more advanced JIT optimizations being complicated to implement, and the really cool ones are only arriving just now. So C++ is faster, in many cases. But this is only part of the answer. The cases where C++ is actually faster, are highly optimized programs, where expert programmers thoroughly opti...
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Difference between SPI and API?

... The API is the description of classes/interfaces/methods/... that you call and use to achieve a goal, and the SPI is the description of classes/interfaces/methods/... that you extend and implement to achieve a goal. Put differently, the API tells you what a specific class/method does for you, ...
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getActivity() returns null in Fragment function

...od to your Fragment and putting a break point on it and seeing when it is called relative to your call to asd(). You'll see that it is called after the method where you make the call to asd() exits. The onAttach call is where the Fragment is attached to its activity and from this point getActivity()...
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What are -moz- and -webkit-? [duplicate]

..., Safari; -moz for Firefox, -o for Opera, -ms for Internet Explorer). Typically they're used to implement new, or proprietary CSS features, prior to final clarification/definition by the W3. This allows properties to be set specific to each individual browser/rendering engine in order for inconsist...
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Comment Inheritance for C# (actually any language)

... Automatically generated docs seem like a very bad idea to me. They don't add any useful information but only blow up the code unnecessarily. If a tool can understand what a method does from its name, than a person can also understand ...
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Why use #ifndef CLASS_H and #define CLASS_H in .h file but not in .cpp?

...r various reasons. During compilation of your project, each .cpp file (usually) is compiled. In simple terms, this means the compiler will take your .cpp file, open any files #included by it, concatenate them all into one massive text file, and then perform syntax analysis and finally it will conv...
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Java 8 Distinct by property

...ey(Person::getName)) Note that if the stream is ordered and is run in parallel, this will preserve an arbitrary element from among the duplicates, instead of the first one, as distinct() does. (This is essentially the same as my answer to this question: Java Lambda Stream Distinct() on arbitrary ...