Good morning! Yesterday, I wrote a parody post about Yours Truly. I stated that OOP and FP are basically the same — and I meant it. But you may have recognized that my example

This is my first "Vavr One Log" post in 2019. I would like to take the chance to outline what we've achieved so far and show the direction of our journey.

Sealed types It is an inadequacy of the previous Vavr version that Try was designed to be an interface. It allows 3rd party libraries to put their own implementations into the mix. // Java

The new structure of Vavr is taking shape. I still focus on searching ways to simplify Vavr, which means removing unnecessary things. Removing generated code Removing functions and tuples is the right decision.

A few days ago I started to re-design Vavr 0.9 towards 1.0. We collected ideas for months, now is the time to put them into practice. The more I think about

I'm really excited to feature our first guest post - thank you, Frederico! Hello! I'm Frederico Honório, a software engineer from Portugal and I'd like to show you a way to work with

Every now and then I get my hands on a Java project that requires to talk to a database. Depending on who of my team mates I'm talking to, database experts or Java

A few days ago a status message on Twitter led to a coding battle. (See the full conversation here and Lukas' great article about his SQL solution here.) In fact, competitions are a

It has been a while since our last blog post and we have much to tell. Three months ago we released Vavr 0.9, the first release after our rebranding. We urgently needed

Today we finished the first of three Java collection views: List view. And we put quite some effort into testing the view well against all of our sequential persistent collections. We are currently

Hi all! You may have already noticed that we are rebranding Javaslang due to a trademark conflict with Java™. The name "Javaslang" consists of two parts, "Java" and "

We are planning to introduce partial functions in a future release of Javaslang. This new feature is mainly driven by one use-case, fusing the map() method with the concept of pattern matching, called

We distinguish between functions, values (sum-types) and tuples (product-types). Every type in Javaslang that represents a value is of type Value. The Nature of Values Values need a human readable string representation and

In our "Cats & Dogs" blog post we wrote about a security issue that raises when using mutable Java collections. In particular, type narrowing might lead to heap pollution in the

Javaslang 2.1.0-alpha is available for testing! As usual, the API docs can be found on javadoc.io. Please provide us with feedback on our project page. The following info-graphic gives a

It is nothing new that shared mutable state is the root of all evil. Especially concurrent programming requires a proper synchronization of shared mutable state. But even in single-threaded environments mutability is a

An organization is organic. It lives! I plan to refactor the organization a bit as a first step towards our next major release Javaslang-3.0.0. We need small and simple parts that

With Javaslang 2.0.0 we introduced javaslang.API, the best way to use language-level constructs like the pattern matching API and for-comprehensions. import static javaslang.API.*; class Example { String stringify(int n)

The questions pile up, which is why Some(null) is allowed in Javaslang. "Isn't Option meant to make computations null-safe?" "How can that be?" For example this code throws

Scala 2.12 will include Future improvements as Viktor Klang described on his Github-Blog "Letters from Klang". Javaslang's Future can also benefit from these ideas. But there came another improvement to