Gain insights into Kotlin language essentials and delve into design patterns and best practices. Discover functional programming techniques to enhance code reuse, robustness, and build reliable, scalable projects.

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Design patterns enable developers to speed up the development process by providing proven development paradigms. Reusing design patterns helps prevent complex issues that can cause major problems. Moreover, it improves your codebase, promotes code reuse, and makes an architecture more robust.

In this course, you will start with a gentle introduction of the Kotlin language. You will explore design patterns that are part of the best practices that help developers use Kotlin efficiently. Design patterns appeared in the era of object-oriented languages such as C++ and Java. You will learn the language features that Kotlin provides, which allow developers to program in a functional style and implement the design patterns.

After taking this course, you’ll be able to take your knowledge of Kotlin, design patterns, and associated best practices to the software industry and apply it to build reliable, scalable, and maintainable projects.

Kotlin Design Patterns and Best Practices

To allow an object to alter its behavior at runtime


What is the goal of the Strategy design pattern?


What is the goal of the Strategy design pattern?

Functions can only be called from a class.


Functions can only return primitive types.


What does it mean for a function to be a first-class citizen in Kotlin?


What does it mean for a function to be a first-class citizen in Kotlin?

It ensures that there's a finite number of classes that extend from it, and requires that all cases are specified in a when statement.


It helps encapsulate the behaviors of an object into separate classes and switch. between them dynamically.

It provides a way to create objects without specifying the exact class to create.


What are the benefits of using a sealed class when implementing the State design pattern in Kotlin?


What are the benefits of using a sealed class when implementing the State design pattern in Kotlin?

In the thin approach of implementing the State design pattern, which class holds the state?


In the thin approach of implementing the State design pattern, which class holds the state?

To break down a complex piece of logic into a collection of smaller steps


To implement multiple inheritance in Kotlin


To reduce the number of database requests in a web application


What is the purpose of the Chain of Responsibility design pattern?


What is the purpose of the Chain of Responsibility design pattern?

To authorize users based on their roles and permissions


What is the role of a filter chain in a web server?


What is the role of a filter chain in a web server?

What are some examples of domain-specific languages (DSLs)?


What are some examples of domain-specific languages (DSLs)?

To call the `from()` function with an instance of `SelectClause` as its only argument



To call the `apply()` function of the `SelectClause` object


What is the purpose of the `apply()` function in the select function implementation?


What is the purpose of the <code>apply()</code> function in the select function implementation?

It provides a default implementation for a function.


It executes a function only if it exists.


It sets a function's visibility to public.


What does the question mark operator (?) do in Kotlin?


What does the question mark operator (?) do in Kotlin?

Subscribers should be able to register or unregister themselves at runtime.


The publisher should be able to register or unregister itself.


The publisher should be able to notify itself.

What is the twist in the Observer pattern?


What is the twist in the Observer pattern?

Practice your learning outcomes and test your understanding of the material presented in this chapter by taking this quiz.

Getting Started with Kotlin

Working with Creational Patterns

Understanding Structural Patterns

Getting Familiar with Behavioral Patterns

Introducing Functional Programming

Threads and Coroutines

Controlling the Data Flow

Designing for Concurrency

Idioms and Anti-Patterns

Concurrent Microservices with Ktor

Reactive Microservices with Vert.x

Conclusion

Quiz on Behavioral Patterns