Kotlin Fundamentals

Would you like to learn to program in a powerful, modern language suitable for front-end, back-end, and mobile platforms? Then choose Kotlin, one language to rule them all.

Description

Developers with experience in programming learn Kotlin, a modern programming language. It does not matter which prior knowledge you have, as long as you know the principles of (object-oriented or functional) programming.

You will learn the fundamental properties of Kotlin, after which you immediately begin writing practical Kotlin code. You can expect to understand these concepts by seeing real-world code examples. After that, you can follow up with the training "Advanced Kotlin", which starts the following day.

Learning Goals

• Explain the most important characteristics of Kotlin, and why it was created. [Understand]
• Produce a stand-alone Kotlin program that uses a main function, other top-level functions, top-level properties and type inference. [Apply]
• Produce code that declares and uses extension functions and properties. [Apply]
• Use vararg, infix and destructuring. [Apply]
• Construct a Kotlin application that uses classes (including data, abstract, inner and nested classes), properties, interfaces, sealed classes and a when statement. [Apply]
• Explore the purpose of objects, lamdbas and scope functions like with, let and apply by implementing the Singleton design pattern using these constructs. [Apply]
• Characterize the difference between a sequence and a collection, and how the methods in the functional APIs behave for both sequences and collections. [Understand]
• Explain how primitives and other basic types like Strings work (including text blocks and String templates), above and under the hood, including types like Any, Unit and Nothing. [Understand]
• Construct code using nullability in the best way, along with the necessary operators. [Apply]

Subjects

Introduction

Basics basic elements, classes and properties, choices, loops, exceptions

Functions function declarations, extension functions, working with collections, strings

Classes, objects, interfaces declaring classes, hierarchies, data classes, delegation, object

Lambdas lambda expressions, collection API, sequences, Java interop, receivers

Type system nullability, types, collections and arrays, immutability