Applicative is just another concept similar in meaning and history to Functors and Monads. I have covered these two in my previous articles, and I think it is finally time to start closing this little series about the most commonly known functional abstractions. Besides explaining some details and theory, I will implement a simple Applicative. I will also use Optional, hopefully one last time, to show what advantages Applicatives give us.
The source code for this article is available in GitHub repository.