In the question Idiom for initializing an std::array using a generator function taking the index?,which basically asks how one can initialize an array of an arbitrary type which is not necessarily ...

Suppose I have a function T foo(size_t i). What would be an elegant and succinct way of constructing an object arr, of type std::array<T, N>, so that we have arr[i] == foo(i)? If possible, I ...

According to cppreference, std::construct_at(T*p, Args&&... args) is equivalent to return ::new (const_cast<void*>(static_cast<const volatile void*>(p))) T(std::forward<Args...

Could you please explain me what's wrong in the following code? function box (width, height, color) { this.width=width; this.height=height; this.color=color; this.style.width=width; this.style...

I'm partial to using member initializer lists for my constructors, but I've long since forgotten the reasons behind this. Do you use member initializer lists in your constructors? If so, why? If no...

In my current project (OpenGL Voxel Engine) I have a serious issue when generating models. I have a very object oriented structure, meaning that even single parameters of my vertices are Objects. T...

I've got a class that has a couple of data members of class type. I don't want the constructors for these members to be called when declared, so I'm trying to hang onto a pointer to the object expl...

In code like this: #include <iostream> #include <initializer_list> #include <string> struct A { A() { std::cout << "2" << std::endl; } A(int a) { std::cout <&...

In Perl5 you can do something like this: #!/usr/bin/env perl use 5.010; package Local::Class { use Moo; has [qw( x y )] => ( is => 'ro'); sub BUILDARGS { shift; return (@_) ? (@_ > 1)...

Let's say a class has been defined as class A { //..... }; and now I am creating two objects as A a,b; In what order are a and b created? Is it defined by the standard?

In my application, I have to instantiate many different types of objects. Each type contains some fields and needs to be added to a containing type. How can I do this in an elegant way? My current...

If I have the following code, why does it return an error saying Cannot set property 'second_prop' of undefined . I thought that you can extend the prototype property and add more variables and met...

By forwarded in-place construction, I take to mean std::allocator::construct and the various emplace methods, e.g., std::vector::emplace_back. I just find that forwarded in-place construction in C+...

Let's say I have the following code public class SuperClass { protected int super_class_value; public SuperClass (int value) { this.super_class_value = value; } } public class Subclass exten...

I woud like to write a JUnit test to verify that the code below uses a BufferedInputStream: public static final FilterFactory BZIP2_FACTORY = new FilterFactory() { public InputStream makeFilter(I...

Does Java has a default copy constructor as C++? If it has one - does it remain usable if I declare another constructor (not a copy constructor) explicitly?

Is the following code undefined behavior, implementation defined or defined by the standard? I couldn't find any reference regarding assigning an integer to its own address. volatile int x = (int)...

Observation: the codes pasted below were tested only with GCC 4.4.1, and I'm only interested in them working with GCC. Hello, It wasn't for just a few times that I stumbled into an object constru...

Please help me to understand why the following code works: <script> var re = RegExp('\\ba\\b') ; alert(re.test('a')) ; alert(re.test('ab')) ; </script> In the first line there is ...