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INTERACTIVE COURSE

The Ultimate Guide to Kotlin Programming

Beginner

156 Lessons

20h

Certificate of Completion

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Course Overview

Kotlin has been growing in popularity among developers for some time. It was given even more recognition when Google announced in 2019 that Kotlin was now their preferred language for Android development. In this comprehensive course, you’ll start by learning the fundamentals, such a...

How You'll Learn

Hands-on coding environments

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Faster than videos

Videos are holding you back. The average video tutorial is spoken at 150 words per minute, while you can read at 250. That‘s why our courses are text-based.

No set-up required

Start learning immediately instead of fiddling with SDKs and IDEs. It‘s all on the cloud.

Progress you can show

Built-in assessments let you test your skills. Completion certificates let you show them off.

Hands-on coding environments

You don’t get better at swimming by watching others. Coding is no different. Practice as you learn with live code environments inside your browser.

Faster than videos

Videos are holding you back. The average video tutorial is spoken at 150 words per minute, while you can read at 250. That‘s why our courses are text-based.

No set-up required

Start learning immediately instead of fiddling with SDKs and IDEs. It‘s all on the cloud.

Progress you can show

Built-in assessments let you test your skills. Completion certificates let you show them off.

Course Contents

1. Getting Started

Who's This Course for?

What's in this course?

2. Hello Kotlin

Introduction to Kotlin

Reasons to Love Kotlin

Why Should You Choose Kotlin?

Taking Kotlin for a Ride

Compile to Bytecode and Run

Compiling to Other Targets

Which Option to Choose?

3. Kotlin Essentials for the Java Eyes

Introduction to Kotlin Essentials

Sensible Warnings

Prefer val over var

Improved Equality Check

String Templates

More Expressions, Fewer Statements

4. Working with Functions

Introduction to Functions in Kotlin

Creating Functions

Default and Named Arguments

vararg and Spread

5. External Iteration and Argument Matching

Introduction to External Iteration with Argument Matching

Range and Iteration

Iterating over Arrays and Lists

When It’s Time to Use when

6. Using Collections

Introduction to Collections in Kotlin

Flavors of Collections

Using Pair and Triple

Arrays of Objects and Primitives

7. Type Safety to Save the Day

Introduction to Type Safety in Kotlin

Any and Nothing Classes

Nullable References

Type Checking and Casting

Explicit Type Casting

Generics: Variance and Constraints of Parametric Types

Reified Type Parameters

8. Objects and Classes

Introduction to Objects and Classes

Objects and Singletons

Creating Classes

Companion Objects and Class Members

Creating Generics Classes

9. Class Hierarchies and Inheritance

Introduction to Class Hierarchies and Inheritance

Creating Interfaces and Abstract Classes

Nested and Inner Classes

Creating and Using Enums

10. Extension Through Delegation

Introduction to Delegation

When to Choose Delegation over Inheritance?

Designing with Delegates

Delegating to a Parameter

Dealing with Method Collisions

Caveats of Kotlin Delegation

Delegating Variables and Properties

Built-in Standard Delegates

11. Functional Programming with Lambdas

Introduction to Lambdas in Kotlin

The Functional Style

Lambda Expressions

Lambdas and Anonymous Functions

Closures and Lexical Scoping

Non-Local and Labeled return

Inlining Functions with Lambdas

12. Internal Iteration and Lazy Evaluation

Introduction to Internal Iteration and Lazy Evaluation

External vs. Internal Iterators

Internal Iterators

Sequences for Lazy Evaluation

13. Fluency in Kotlin

Introduction to Fluency in Kotlin

Overloading Operators

Injecting Using Extension Functions and Properties

Extending Functions

Function Fluency with infix

Fluency with Any Object

Implicit Receivers

14. Creating Internal DSLs

Introduction to DSLs in Kotlin

Types and Characteristics of DSLs

Kotlin for Internal DSLs

Challenges in Building for Fluency

Type-Safe Builders

Narrowing Access with Scope Control

15. Programming Recursion and Memoization

Introduction to Recursion and Memoization

The Power and Perils of Recursion

Tail Call Optimization

Applying Memoization to Dynamic Programming

16. Exploring Coroutines

Introduction to Coroutines in Kotlin

Coroutines and Concurrency

Running Concurrently Using Coroutines

Coroutine Context and Threads

Debugging Coroutines

async and await

A Peek at Continuations

Creating Infinite Sequences

17. Asynchronous Programming

Introduction to Asynchronous Programming in Kotlin

Programming Asynchronously

Exception Handling

Cancellations and Timeouts

18. Intermixing Java and Kotlin

Joint Compilation

Calling Java from Kotlin

Calling Kotlin from Java

19. Unit Testing with Kotlin

Introduction to Unit Testing in Kotlin

The Code Under Test

Getting the Project Files

Starting with a Canary Test

Writing Empirical Tests

Writing Data-Driven Tests

Mocking Out Dependencies

Testing Top-Level Functions

Testing Coroutines and Asynchronous Calls

Integrating with the Service

Viewing the Code Coverage

Taking the App for a Drive

20. Programming Spring Applications with Kotlin

Introduction to Spring Applications in Kotlin

Creating a Starter Project

Creating a Controller

Creating an Entity Class

Creating a Repository Interface

Creating a Service

Integrating the Service with Controller

Taking It for a Ride

21. Writing Android Applications with Kotlin

Introduction to Android Applications in Kotlin

Creating a Project

Defining Domain Objects

Creating Layouts

Implementing the Activity

Updating the RecyclerView

Seeing the App in Action

22. Appendix

Transpiling to JavaScript

Kotlin to WebAssembly

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