This blog post was created to see how Scala.js is holding on and have some fun with programming. I decided to do a simple mini-game using Scala.js and Three.js libraries.

I will explore Scala.js from practical perspective. You’ll see the perks of using typed languages in frontend. We are also going to take a look under the hood and see some generated JS code. Finally I’m going to present some advantages and disadvantages of Scala.js and try to answer the question: Is Scala.js production ready ? Read more

Small retrospection

In my previous blog post we talked about shapeless and how it could be applied to enhance how you work with Futures. Even though we were focused on Futures, our goal wasn’t to provide the best and ultimate util to deal with them, but to demonstrate how shapeless can help us build functions that are more flexible than almost everything we are used to work with.

So in last post we have created a kind of varargs function that is able to adjust its return type to the arguments passed in. Today we’ll take it much farther by adding scalaz, ApplicativeBuilder and Monads into the soup. Read more

Futures today

Today, when reactive programming is so popular concept and you can see ‘We’re reactive!’ claim on so many pages that have anything to do with scala (and not only), Futures are something you have to deal all the time. Read more

The Problem

In my previous post we have written a simple app with Scala.js. In the end we managed to do everything we wanted to, but as we added more and more code a problem appeared – state management, the real app killer. Although our app didn’t do anything advanced, state handling and UI updates forced us to write a lot of additional code.

That post has shown that Scala.js allows us to write browser apps, but it also demonstrated that these apps can be vulnerable to other ills of frontend programming. To fix this issue we need to simplify our codebase. One way to do that is by adding a binding between the UI and what data our app holds. This way if the data changes in one place it will be automatically propagated to the other. We will implement this using Reactive Extensions. Read more


What is Scala.js?

Scala.js is compiler that targets JavaScript, unlike the traditional Scala compiler which targets JVM bytecode. What it means in practice – with Scala.js you can write Scala code that will be executed in the browser. Read more

If you’re looking for the best library to build concurrent and distributed applications, probably sooner than later you’ll come across Akka. It’s a very powerful open source library maintained by Typesafe for making such apps. Read more


In Scalac we believe that communication is essential in IT and that projects with inefficient information sharing are doomed to fail. Fortunately for us it doesn’t always mean that putting people in one place is the only way. More often it’s about creating the right spirit for exchanging knowledge and providing ways to do so.

As in Scalac we are very often working remotely, we had to come up with a tool to help us communicate. We tried few different products for communication, but in the end we switched to Slack. We are using it for around a year now and are pleased with the rich experience it offers. Read more

At ScalaC we’ve recently started adopting Slick 3.0. If you haven’t tried it yet, hopefully these notes will make the process go smoother. Read more

What is STM?

Wikipedia defines it as follows: software transactional memory (STM) is a concurrency control mechanism analogous to database transactions for controlling access to shared memory in concurrent computing. It is an alternative to lock-based synchronization. Hmmm… but what does it mean in practice? Read more

Scala end to end

In Scalac we believe that Scala is a great general purpose language, that helps you to build high quality software quickly. And although Scala shines in the backend, it’s use is not limited to server side programming. With these blog posts we would also like to convince all of you that it’s possible to build a full stack application using only Scala.

This, and the following blog posts from the series, are an experiment proving that the Scala ecosystem is mature enough to be the main driving force for building production ready apps. Although I would not recommend using Scala only for its hype, I want to show that it’s a viable alternative for both freelancers, startups and enterprises looking for a full stack technology. Read more