What are the key differences between object-oriented programming and functional programming?

In my final year project, I developed a simple task management application using object-oriented programming principles. I created classes for tasks, users, and categories, which allowed me to encapsulate data and functionality. This made it easy to manage and extend the application. For instance, I implemented inheritance by creating a base class for general tasks and derived classes for specific types like 'urgent' or 'recurrent' tasks. This experience taught me how OOP can help in organizing complex code and making it reusable, which I found very useful during my internship when I had to work on a larger codebase.

While volunteering for a local non-profit, I joined a team to organize community events. We used a functional approach when designing our event planning process. Instead of assigning tasks to individuals, we created a series of functions that processed inputs like event type and resources needed, generating outputs like schedules and checklists. This functional style allowed for better collaboration because everyone could contribute by writing functions that returned specific results without altering shared data. This experience highlighted how functional programming promotes less side effects and better predictability in outcomes.

In my first job as a junior developer, I collaborated on a project that utilized both object-oriented and functional programming paradigms. For instance, while we structured our application using OOP for the main components, we also implemented functional programming techniques for data processing tasks. This combination allowed us to leverage the strengths of both paradigms, such as using objects for better organization and functions for efficient data handling. This experience reinforced my understanding of when to apply each paradigm effectively, depending on the task at hand.