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Why is React's concept of Virtual DOM said to be more performant than dirty model checking?
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Here's a comment by React team member Sebastian Markbåge which sheds some light:
React does the diffing on the output (which is a known serializable format, DOM attributes). This means that the source data can be of any format. It can be immutable data structures and state in...
Retrieving the last record in each group - MySQL
There is a table messages that contains data as shown below:
27 Answers
27
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What is external linkage and internal linkage?
...n for non-const symbols and static (internal) for const symbols.
// in namespace or global scope
int i; // extern by default
const int ci; // static by default
extern const int eci; // explicitly extern
static int si; // explicitly static
// the same goes for functions (but there are no const func...
Why are private fields private to the type, not the instance?
...technical point of view, there's no reason to choose one way or the other (esp. when considering that Eiffel.NET can do this with IL, even with multiple inheritance, there's no inherent reason not to provide this feature).
Of course, it's a matter of taste and as others already mentioned, quite som...
Why is this inline-block element pushed downward?
...re to grasp the idea of line boxes and how they are lined in the same line esp read last paragraph carefully because there lies the answer of your question.
The baseline of an 'inline-block' is the baseline of its last line box in the normal flow, unless it has either no in-flow line boxes or if...
ASP.NET MVC View Engine Comparison
...f great value to the ASP.NET MVC community if people add their experience (esp. anyone who contributed to one of these). Anything implementing IViewEngine (e.g. VirtualPathProviderViewEngine) is fair game here. Just alphabetize new View Engines (leaving WebFormViewEngine and Razor at the top), and...
Difference between Covariance & Contra-variance
...ther. More specifically, a mapping can be covariant or contravariant with respect to a relation on that set.
Consider the following two subsets of the set of all C# types. First:
{ Animal,
Tiger,
Fruit,
Banana }.
And second, this clearly related set:
{ IEnumerable<Animal>,
IEn...
What is the purpose of the implicit grant authorization type in OAuth 2?
...choice between level of security and convenience.
– PålOliver
Jun 3 '13 at 11:49
2
This answers ...
What happens when a computer program runs?
...e most common functions are PUSH and POP to add and remove items from it, respectively. It is commonly used for function-local variables (so-called "automatic storage"), function arguments, return addresses, etc. (more below)
A "heap" is just a nickname for a chunk of memory that can be allocated ...
When exactly is it leak safe to use (anonymous) inner classes?
... new definition and simply override the appropriate methods. In all other respects it is a Inner Class, which means that it keeps an implicit reference to its container.
Runnables and Activities/Views
Yay! This section can be short! Due to the fact that Runnables run outside of the current thread,...