Functional Kotlin

Kotlin – Data Types, Objects, and Classes

In this chapter, we'll cover Kotlin's type system, object-oriented programming (OOP) with Kotlin, modifiers, destructuring declarations, and more.

Kotlin is, primarily, an OOP language with some functional features. When we use OOP languages to resolve problems, we try to model the objects that are a part of our problem in an abstract way with the information that is relevant to the problem.

If we're designing an HR module for our company, we'll model employees with state or data (name, date of birth, social security number, and others) and behavior (pay salary, transfer to another division, and others). Because a person can be very complex, there is information that isn't relevant for our problem ...