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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Kotlin

Kotlin_Co

Kotlin_SPA

Cats_Hostel

Cats_Shelter(1..5)

Cats_Shelter(6-7-8)

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

What is the output of the following code?
```kotlin
fun main() {
    val person = Person().apply {
        name = "Sean Connery"
        nickname = "Dr. Kotlin"
    }

    println(person.nickname)
}

class Person {
    lateinit var name: String
    lateinit var nickname: String
}
```

What is the output of the following code?
<pre><code class="language-kotlin">fun main() {
 val person = Person().apply {
 name = &quot;Sean Connery&quot;
 nickname = &quot;Dr. Kotlin&quot;
 }

 println(person.nickname)
}

class Person {
 lateinit var name: String
 lateinit var nickname: String
}
</code></pre>

What is the output of the following code?

``` kotlin
fun main() {
    val l = (1..10).toList()

    l.filter { it % 2 == 0 }
        .also { println(it) }
        .map { it * it }
}
```

What is the output of the following code?
<pre><code class="language-kotlin">fun main() {
 val l = (1..10).toList()

 l.filter { it % 2 == 0 }
 .also { println(it) }
 .map { it * it }
}
</code></pre>

What is the syntax for the safe cast operator in Kotlin?


What is the syntax for the safe cast operator in Kotlin?

What is the syntax for casting an object in Kotlin?

What is the syntax for casting an object in Kotlin?

What is the return type of the `is` operator in Kotlin?

What is the return type of the <code>is</code> operator in Kotlin?

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 Idioms and Anti-Patterns