assignment-operator

Possible Duplicate: Javascript syntax: what comma means? I came across the code while reading this article (do a Ctrl + F search for Andre Breton ): //function returning array of `umbrella` fibonacci numbers function Colette(umbrella) { var staircase = 0, galleons = 0, brigantines = 1, armada = [galleons, brigantines], bassoon; Array.prototype.embrace = [].push; while(2 + staircase++ < umbrella) { bassoon = galleons + brigantines; armada.embrace(brigantines = (galleons = brigantines, bassoon)); } return armada; } What does the x = (y = x, z) construct mean? Or more specifically, what does the

For properly handling object copying, the rule of thumb is the Rule of Three . With C++11, move semantics are a thing, so instead it's the Rule of Five . However, in discussions around here and on the internet, I've also seen references to the Rule of Four (and a half) , which is a combination of the Rule of Five and the copy-and-swap idiom. So what exactly is the Rule of Four (and a half)? Which functions need to be implemented, and what should each function's body look like? Which function is the half? Are there any disadvantages or warnings for this approach, compared to the Rule of Five?

While playing with implementing a virtual assignment operator I have ended with a funny behavior. It is not a compiler glitch, since g++ 4.1, 4.3 and VS 2005 share the same behavior. Basically, the virtual operator= behaves differently than any other virtual function with respect to the code that is actually being executed. struct Base { virtual Base& f( Base const & ) { std::cout << "Base::f(Base const &)" << std::endl; return *this; } virtual Base& operator=( Base const & ) { std::cout << "Base::operator=(Base const &)" << std::endl; return *this; } }; struct Derived : public Base { virtual

Please write a list of tasks that a copy constructor and assignment operator need to do in C++ to keep exception safety, avoid memory leaks etc. Luc Hermitte First be sure you really need to support copy. Most of the time it is not the case, and thus disabling both is the way to go. Sometimes, you'll still need to provide duplication on a class from a polymorphic hierarchy, in that case: disable the assignment operator, write a (protected?) copy constructor, and provide a virtual clone() function. Otherwise, in the case you are writing a value class, you're back into the land of the Orthogonal

Trying to build an assignment Operator for a single linked list class. I thought I built it correctly, but am still getting a memory leak. The class consists of a a First and Last variable. And then a Node structure. The Node structure looks like this: struct node { TYPE value; node * next; node * last; }; My Assignment Operator looks like this, it still has a memory leak queue& queue::operator=(const queue &rhs){ if(this == &rhs ){ node *ptr = first; node *temp; while(ptr != NULL){ temp = ptr; ptr = ptr->next; delete temp; // release the memory pointed to by temp } delete ptr; } else{ if (rhs

It seems to me that Derived class don't inherit base class Assignment operator if Derived class inherit Base class assignment operator , can you please explain the following example In the following code I am overriding base class operator= in Derived, so that Derived class default assignment operator calls overloaded operator= #include <iostream> using namespace std; class Base { public: Base(int lx = 0):x(lx) { } virtual Base& operator=( const Base &rhs) { cout << "calling Assignment operator in Base" << endl; return *this; } private: int x; }; class Derived : public Base { public: Derived