Back in 2019, I answered the question “Making sense of Scala FP Libraries” posted at StackOverflow. I recently came up with an idea to extend my short answer into a full-fledged blog post. The multitude of functional programming libraries in Scala’s ecosystem can be indeed confusing. Why there are so…

Internet services and devices collect and store an immense amount of information, encompassing every facet of our lives. That data is gathered by businesses and used to help them innovate and acquire a competitive advantage. …

Probably no article about caching can do without a famous quote about two hard things in Computer Science, so I will also start with it: There are only two hard things in computer science: cache invalidation and naming things. — Phil Karlton So if doing caching right is that troublesome…

Cats Effect is an excellent and performant framework for doing asynchronous computations in a functional manner. It provides an IO monadic datatype for controlling the actions of your application. Effects wrapped in instances of the IO monad are lazily evaluated. …

On randomness in data Picking a random number might seem to be a no-brainer for us, humans. We just close our eyes and tell the first number that comes to our minds. But is this really the case for computers? By design, they should be pretty predictable. …

One of the key aspects of the functional programming paradigm is transforming immutable values through pure functions. Whenever a pure function computes a new altered version of the data structure (for example by appending a new node to a list), the original one should remain unmodified and be available via…

After many years of waiting, Scala 3 was finally released in May 2021. Moreover, 2021 was also the year of release of the 3rd version of cats-effect, the very popular scala’s functional programming framework. I do Scala programming for a living, but most of the codebase I work on daily…

Usually, the story of a successful startup begins with a centralized, monolithic application. At first, the performance of the service is terrific. Every user’s request can be handled with low and steady latency. Resource load is acceptable and the application can run even on commodity hardware. Some time passes and…

Managing a sizeable software system is always a challenge. The proper solution for taming the complexity is isolating its modules into independent services. The microservices architecture has gained wide acceptance in the IT industry over the years. …