singleton

If I create a class as a loner, do I need to implement an assignment operator, copy constructor, class comparison operators, ... I will ask how to implement Singleton if the class object will be created as Class * c = new Class(); And not so Class c;

In one of the answers on the forum there are these words: It is better to create a private variable in the descendant of the ... ou follow this recommendation. The accepted answer in this question is the subject of my question Singleton in Android-evil?

While studying the Singleton pattern, I came across the fact that the classical implementation of this pattern is very lame i ... return Nested.instance; } private class Nested { internal static readonly Singleton instance = new Singleton(); } }

Hello! In the code, there is often such a construction (in any c-like language). class One { One instanse; //Вот эта строч ... d each instance already contains an instance of itself? Optional - where and in what book (site) is this clearly described?

Function that returns singleton: static SingletonDatabase& get() { static SingletonDatabase db; return db; } ... does it mean? A local static field, with a default constructor. Why is this implementation better than the previous ones?

In Unity3d, when creating the "public class MapCamera : Singleton" class, it throws an error: - The namespace '' already contains a definition for 'MapCamera'. What am I doing wrong?

If we execute the code below, a window with a button inside will be created, which whenever clicked will open another window ... fault_size(300, 200) self.add(button) self.show_all() if __name__ == '__main__': Main() Gtk.main()

Galley, I have a problem which is as follows, my database connection class is a Singleton. It happens that if the server fall ... try to run a resultset thence gives exception. How can I make the connection class instance know that the server has crashed?

The Class PEHandlerService needs to have a single instance and I don't want to use synchronized because of the slowness, I wo ... ervice(); } return instancia; } } Shouldn't the two codes return ? Why does this only occur in Code 2?