c# - Direct casting vs 'as' operator? - Stack Overflow
Sep 25, 2008 · Custom implicit/explicit casting: Usually a new object is created. Value Type Implicit: Copy without losing information. Value Type Explicit: Copy and information might be lost. IS-A relationship: Change reference type, otherwise throws exception. Same type: 'Casting is redundant'. It feels like the object is going to be converted into ...
casting - Explanation of ClassCastException in Java - Stack Overflow
May 25, 2009 · Java allows us to cast variables of one type to another as long as the casting happens between compatible data types. For example you can cast a String as an Object and similarly an Object that contains String values can be cast to a String. Example. Let us assume we have an HashMap that holds a number of ArrayList objects. If we write code ...
What are the rules for casting pointers in C? - Stack Overflow
Jul 20, 2015 · Casting pointers is usually invalid in C. There are several reasons: Alignment. It's possible that, due to alignment considerations, the destination pointer type is not able to represent the value of the source pointer type. For example, if int * were inherently 4-byte aligned, casting char * to int * would lose the lower bits. Aliasing.
What is the difference between casting and coercing?
If your situation is slightly different, and you only want to select a different one of the value’s types, casting is the tool for the job. Casting simply indicates that you wish to operate on a particular type that a value includes. The difference at the code level varies from C# to IL. In C#, both casting and coercion look fairly similar:
c++ - What does casting to `void` really do? - Stack Overflow
Dec 15, 2015 · Casting a variable expression to void to suppress this warning has become an idiom in the C and later C++ community instead because the result cannot be used in any way (other than e.g. (int)x), so it's unlikely that the corresponding code is just missing. E.g.:
c# - How Expensive is Casting an Object? - Stack Overflow
Dec 17, 2009 · However, if you are repeatedly casting objects many times then that is when you should try to avoid it if you find it is a cause of a performance issue. After all, one of the main improvements from .NET 1.1 to 2.0 was the introduction of generics - this addressed the issue of strongly typed lists of objects (e.g. ArrayList = based on object ...
c# - Why should casting be avoided? - Stack Overflow
Aug 1, 2013 · Casting from a derived to base class pointer/reference: This is so common and natural that the compiler will do it implicitly. If making it explicit increases readability, the cast is a step forwards, not backwards! Casting from a base to derived class pointer/reference: Also common, even in well-designed code. (Example: heterogeneous containers.)
Choppy and pixelated picture when casting from Windows to TV …
Aug 9, 2023 · I am trying to cast (Windows + K) my laptop screen on my TV screen, and the picture is choppy and pixelated whenever there's motion on screen. My laptop is an LG Gram 17 with 16:10 aspect ratio. My TV
Which is the best practice in C# for type casting? [duplicate]
Sep 25, 2015 · A dynamic cast requires you to do a type check, that is, the runtime will check if the object you are casting to will be of the type. After all, you're casting down the inheritance tree, so you might as well cast to something else completely. If this is the case, you'll end up with an InvalidCastException. Because of this, dynamic casts require ...
c++ - Proper way of casting pointer types - Stack Overflow
I used to think that reinterpret_cast is OK for e.g. casting pointers to and from integer types (like e.g. DWORD_PTR), but to cast from a void* to a BYTE*, isn't static_cast OK? Are there any (subtle?) differences in this particular case, or are they just both valid pointer casts?