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Why are Subjects not recommended in .NET Reactive Extensions?
...ibe to (you can use AsObservable() on your subject to make sure nobody can cast to a Subject and mess things up).
You could also achieve this with a .NET event and use FromEventPattern, but if I'm only going to turn the event into an IObservable anyway, I don't see the benefit of having an event i...
What are the benefits of Java's types erasure?
.... We can get some efficiency and simplicity with the satisfaction that no casts will fail or that methods might be missing upon invocation.
Erasing encourages reasoning.
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Can unit testing be successfully added into an existing production project? If so, how and is it wor
...onfirmed what I was feeling. Will see what other answers get posted before casting my votes and accept though.
– djdd87
Aug 13 '10 at 11:32
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内存管理内幕:动态分配的选择、折衷和实现 - C/C++ - 清泛网 - 专注C/C++及内核技术
.../
void *current_location;
/* This is the same as current_location, but cast to a
* memory_control_block
*/
struct mem_control_block *current_location_mcb;
/* This is the memory location we will return. It will
* be set to 0 until we find something suitable
*/
void *memory_loca...
C++ performance vs. Java/C#
...se method (from string to T), or an efficient equivalent of boost::lexical_cast in C# to understand the problem)
RAII remains unmatched (GC still can leak (yes, I had to handle that problem) and will only handle memory. Even C#'s using is not as easy and powerful because writing a correct Dispose im...
Dynamic type languages versus static type languages
...o override the static checker. For most languages, these take the form of casting, though some (like C# and Haskell) have entire modes which are marked as "unsafe".
Subjectively, I like static typing. Implemented properly (hint: not Java), a static type system can be a huge help in weeding out er...
Where and why do I have to put the “template” and “typename” keywords?
... (e.g: a non-type template parameter N)
Type-dependent expressions (e.g: a cast to a type template parameter (T)0)
Most of the rules are intuitive and are built up recursively: For example, a type constructed as T[N] is a dependent type if N is a value-dependent expression or T is a dependent type...
What are Aggregates and PODs and how/why are they special?
..., if a POD-class A's first member is of type T, you can safely reinterpret_cast from A* to T* and get the pointer to the first member and vice versa.
The list goes on and on…
Conclusion
It is important to understand what exactly a POD is because many language features, as you see, behave diffe...
扩展App Inventor:具有多点触控和手势检测功能 · App Inventor 2 中文网
... games, such as Harry Porter. The player can perform different gestures to cast spells to complete some actions needed. Apps can also use custom gestures as shortcuts to perform certain actions.
Our implementation of custom gesture detection involves two parts: 1) how to add user-defined gestures, ...
扩展App Inventor:具有多点触控和手势检测功能 · App Inventor 2 中文网
... games, such as Harry Porter. The player can perform different gestures to cast spells to complete some actions needed. Apps can also use custom gestures as shortcuts to perform certain actions.
Our implementation of custom gesture detection involves two parts: 1) how to add user-defined gestures, ...