FP and OOP are both old age programming paradigms, having their set of benefits and disadvantages. For instance, it is difficult to strictly follow FP without any side effects and all pure functions, especially for beginners in FP and with complex project requirements. However, with OOP systems, it is difficult to avoid side effects; also, OOP systems are often termed as a nightmare for concurrent programs.
FP doesn't acknowledge state, whereas in real life, states cannot be avoided.
All these hassles can be avoided by using/combining OOP with FP. The most general style of mixing OOP and FP that has been professed can be summarized as functional in the small, object-oriented in the large. This is a simple and the most efficient idea of combining OOP with FP. This concept talks about using OOP at a higher level in your code, that is, in the modular architecture, and you can use OOP for classes and interfaces, while using FP at the lower level, that is, while writing methods...