concept

So I was looking up Mini-max for a Tic-Tac-Toe Game, but couldn't understand how the recursion worked? Okay, so basically here are my questions: How does minimax know whose turn is it? Whats the best way to indicate the player whose turn it is generating? How do you generate possible moves? How do you know when you are at a terminal node, and how do you generate the terminal nodes? For example in this Pseudo-code function integer minimax(node, depth) if node is a terminal node or depth <= 0: return the heuristic value of node α = -∞ for child in node: # evaluation is identical for both players

I have Java EE application with about 10 EntityManagers (number of EMs will probably increase). My application also contains many stateless, statefull and message driven beans. Rather than inject in each bean my EMs with @PersistenceContext (and 2 methods to detect which EM to use for user), I probably store all of that inside a singleton bean and access it with others beans. Like that, no worries about maintainability. Nevertheless, is it thread-safe to store EMs inside one singleton bean? Can a bottleneck appear? Another solution is to create an abstract class and all beans will extend it.

Possible Duplicate: Preferred way to simulate interfaces in C++ I was curious to find out if there are interfaces in C++ because in Java, there is the implementation of the design patterns mostly with decoupling the classes via interfaces. Is there a similar way of creating interfaces in C++ then? MD Sayem Ahmed C++ has no built-in concepts of interfaces. You can implement it using abstract classes which contains only pure virtual functions . Since it allows multiple inheritance, you can inherit this class to create another class which will then contain this interface (I mean, object interface

Possible Duplicate: Abstraction VS Information Hiding VS Encapsulation I know this question might have been asked thousands times on this forum, even net is also filled with lots of definitions about these concepts but all sounds same and all uses same technical words. For example following definitions Encapsulation is a process of binding or wrapping the data and the codes that operates on the data into a single entity. This keeps the data safe from outside interface and misuse. One way to think about encapsulation is as a protective wrapper that prevents code and data from being arbitrarily