What are the best practices for using class variables in programming?

What are the best practices for using class variables in programming?

Class variables should be used sparingly. It's best to limit their use to constants or shared data that all instances need.

Why should I avoid using class variables too much?

Overusing class variables can lead to tight coupling and make your code harder to maintain and test.

Can you give an example of a good use case for a class variable?

Sure! A common use case is defining a constant value, like a maximum number of allowed connections in a database.

What about thread safety? Are class variables safe to use in multi-threaded applications?

Class variables can lead to issues in multi-threaded applications if not handled properly. Use synchronization mechanisms to ensure thread safety.