fp-patterns

Monads and applicatives in Scala 3 differ primarily in effect composition, where monads sequence dependent computations and applicatives compose independent effects. Understanding this distinction helps developers apply correct functional programming patterns for maintainable code.

To avoid common functional programming anti-patterns in Scala 3, recognize and steer clear of monad transformers and mutable state. Applying algebraic design and correct typeclass derivation ensures robust and maintainable application architecture.

Typeclass derivation in Scala 3 should be used when implementing typeclasses to ensure they are correctly derived. This functional programming pattern improves code quality and maintainability by enabling ad-hoc polymorphism without altering existing class hierarchies.

The best way to compose effects in Scala 3 functional programming is by applying correct functor, applicative, and monad usage patterns. Proper effect composition prevents common pitfalls and builds robust, maintainable applications.

You should avoid monad transformers in Scala 3 because they are identified as a functional programming anti-pattern. Avoiding them in favor of algebraic design and proper effect composition prevents complex code structures and improves maintainability.