#scalafp

ScalaFP: Let’s Find The Reasons Behind Monads.

Monads in Functional Programmingplay an important role but they mostly confuse the beginners. One of the reasons for the confusion is that they mostly have a knowledge of imperative style programming, where they have no idea about function composition and its importance. In the terms of functional programming, the composition is the root where we have a set(Z) and we compose the elements of the…

Back2Basics: Exception Handling – #3

In our previous blog Exception Handling – #2, we talked about how we can handle exception using Either.

In this blog, we will explore further about Either, how we can elegantly handle exceptions using Either while working with Collections. We use collections when we want to perform some operations on elements. But what if something goes wrong while performing the transformation, do you have any…

Back2Basics: Understanding Partial Function – #2

In previous blog Understanding Partial Functions – #1, we have talked about what is partial function and how they are different from regular functions. In this blog, we will explore more about the partial function.

We have talked about how we can define partial functions having one argument. But what to do if we have to pass more than one argument.

Let’s try defining divide method which takes two…

Back2Basics: Exception Handling – #1

While building an application, it is common that something might go wrong. What if there is an attempt to divide a number by 0 or fetching the data from the database which does not exist, or reading a file which can’t be located? We need to handle such situations to make sure our application does not go down. Every language provides ways to handle such exceptional scenario, so does Scala.

Scala,…

Knoldus Inc is pleased to announce the launch of “Back2Basics: Tutorials”. We at Knoldus firmly believe that quality of coding plays an important role in the success of any IT organization and here we are adding a few more steps to heighten out coding benchmarks. At Knoldus we are laying the foundation for adopting healthier scala coding environment through getting and setting our Basics right.…

Back2Basics : Existential types in Scala

In the first blog of the Scala Type System series, I  had put a lot of emphasis on the fact that “Type variables make a very powerful piece of type-level programming”. They appear in a variety of forms and variations. One of the important forms is “existential types”. In today’s blog, I would like to get you familiar with the existential types.

Given below is a typical way of defining a variable :

ScalaFP: Let’s Start with Implicit and Scala Cats

In our last blog, we have discussed the Type Class. You can find that blog Here: Type Class. Now we will discuss the Implicit in Scala.

Implicit

Implicit in Scala refers to either a value that can be passed “automatically”, so to speak or a conversion from one type to another that is made automatically. So we can create the implicit method with the help of Scala standard library because it…

Scala FP: Let’s Start with Type Class

Before we start talking about the Functional Programming with the Scala Cats, we should refresh our memory about the Type Class and Implicit. These are the base when we start learning the Scala Cats.

Let’s start the discussion with the Type Class.

Type Class

A type class is an interface or API that represents some functionality, which we want to implement. Type class is programming pattern in…