Kotlin

What you'll learn

• Write idiomatic Kotlin with vals, type inference, functions and string templates.
• Use null safety, smart casts, when expressions and sealed hierarchies to model data safely.
• Apply lambdas, the collections API, extension functions and scope functions.
• Design classes with interfaces, objects, companion objects and delegation.
• Write structured concurrent code with coroutines, dispatchers and Flow.
• Interoperate with Java, test Kotlin code and choose the right platform: server, Android or Multiplatform.

Syllabus

Kotlin Foundations

1. What Kotlin Is
2. Setting Up a Kotlin Project
3. Variables, Functions and Strings

Null Safety and the Type System

1. Nullable Types and Safe Operators
2. when Expressions and Ranges
3. Type Checks, Casts and the Type Hierarchy

Classes and Data Modelling

1. Classes, Constructors and Properties
2. Data Classes
3. Sealed Types and Enums

Functional Kotlin

1. Lambdas and Higher-Order Functions
2. Collections and Sequences
3. Extension Functions and Scope Functions

Object-Oriented Kotlin

1. Interfaces, Inheritance and Visibility
2. Object Declarations and Companion Objects
3. Delegation: by lazy and Class Delegation

Coroutines and Flow

1. Suspend Functions and Coroutine Builders
2. Structured Concurrency and Cancellation
3. Dispatchers and Flow

Practical Kotlin

1. Error Handling: Exceptions and Result
2. Generics and Variance
3. Java Interoperability

Ecosystem and Production

1. Kotlin on the Server and Android
2. Kotlin Multiplatform
3. Testing and Idiomatic Style
4. A Kotlin Production Checklist