Best practice in C++ for casting between number types
May 28, 2016 · What is the best practice for casting between the different number types? Types float, double, int are the ones I use the most in C++. An example of the options where f is a float and n is a …
Casting variables in Java - Stack Overflow
Mar 13, 2011 · Casting in Java isn't magic, it's you telling the compiler that an Object of type A is actually of more specific type B, and thus gaining access to all the methods on B that you wouldn't have had …
Casting objects in Java - Stack Overflow
Mar 15, 2011 · Casting can be used to clearly state that you are calling a child method and not a parent method. So in this case it's always a downcast or more correctly, a narrowing conversion.
Need some clarification regarding casting in C - Stack Overflow
Dec 22, 2009 · There are several situations that require perfectly valid casting in C. Beware of sweeping assertions like "casting is always bad design", since they are obviously and patently bogus. One …
What are the rules for casting pointers in C? - Stack Overflow
Jun 23, 2013 · There are rules about casting pointers, a number of which are in clause 6.3.2.3 of the C 2011 standard. Among other things, pointers to objects may be cast to other pointers to objects and, …
java: How can I do dynamic casting of a variable from one type to ...
2 Your problem is not the lack of "dynamic casting". Casting Integer to Double isn't possible at all. You seem to want to give Java an object of one type, a field of a possibly incompatible type, and have it …
Why is casting a const reference directly to a mutable reference ...
Nov 24, 2018 · The superficial answer to the question "why?" is that these simply are the rules of as expressions in Rust. Quoting from the Nomicon: Casting is not transitive, that is, even if e as U1 as …
c++ - When should static_cast, dynamic_cast, const_cast, and ...
The C-style casts can do virtually all types of casting from normally safe casts done by static_cast<> () and dynamic_cast<> () to potentially dangerous casts like const_cast<> (), where const modifier can …
What's the difference between casting and coercion in Python?
Oct 21, 2009 · Cast really only comes up in the C FFI. What is typically called casting in C or Java is referred to as conversion in python, though it often gets referred to as casting because of its …
Java rules for casting - Stack Overflow
In Java there are two types of reference variable casting: Downcasting: If you have a reference variable that refers to a subtype object, you can assign it to a reference variable of the subtype. You must …