Observer Design Pattern in Modern C++
The Observer Design Pattern is a type of Behavioural Design Pattern that use to get information when certain events happen i.e. basically one component want information about something happening in the other component. And that can a lot of things like a field changes to a particular value or you want to information when the object does a particular thing, etc. Observer Design Pattern in Modern C++ enables you to create subscription mechanism to notify multiple objects about events that happen to the object they’re observing....