In this blogpost while evangelising immutability we end up creating a useful reusable piece of code as a side effect which addresses the limitations of Either[+E, +A] in Scala standard library with respect to performing accumulative data validations. A bold statement which I’ll justify later: “Immutable State is king!” Functional…

It is an article about Functional error handling which will Either turn out to be Success or Failure. In my opinion it is Right to say that you have None to lose and Some to gain if you read it. …

Data engineering, Big Data, Data lakes, Databases, Data warehouses, Data streaming, Data pipelines… How many such terms do you need to hear until you’re convinced that we are indeed living in the age of Data? It is pity that the majority of mainstream programming languages realised only later that it…

Sooner or later you will stumble upon the concept of type classes while traversing your Scala journey. Type class is not something peculiar about Scala, rather it’s a special design approach that is aimed at achieving ad-hoc polymorphism in statically typed functional programming languages, originating from the one and only…

Invariant? Covariant? Contravariant?… What the F[_]?! Scala programming language has an extremely powerful feature called “Variance”. Variance, if used properly can guarantee us to benefit from the increased ability of the compiler to infer types at compile time. It saves us from adding type annotations to every single expression manually…