My ideal service layer has a functional core - easy to understand, easy to test. linked from the article: https://www.javiercasas.com/articles/functional-prog

My ideal service layer has a functional core - easy to understand, easy to test. linked from the article: https://www.javiercasas.com/articles/functional-programming-patterns-functional-core-imperative-shell https://www.javiercasas.com/articles/functional-programming-...