category theory | The Blog Pros

January 20, 2022

What Is Applicative? Basic Theory for Java Developers

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.

December 9, 2021

What Is a Functor? Basic Theory for Java Developers

In general, a Functor is a concept originating from mathematics, to be exact from a part of mathematics called category theory. In my very first article, I described in detail a similar concept known as Monad. Here I want to continue that thread, so I will try to give you some more insight into Functors — what they are, how they work, and what the theory behind them is. I will also implement a simple functor to better understand how they work and why using them may be a clearer solution.

The source code for this article is available in GitHub repository.

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WPBeginner Turns 15 Years Old – Reflections, Updates, and a Giveaway ($50,000 in Prizes)
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It’s quite surreal to type that WPBeginner turns 15 years old today! Time flies when you’re having fun especially with such an amazing community of website owners, small businesses, and web professionals. YOU ARE the best part of WPBeginner! Like every year, I will take… Read More »

The post WPBeginner Turns 15 Years Old – Reflections, Updates, and a Giveaway ($50,000 in Prizes) first appeared on WPBeginner.
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