Kotlin Everywhere: Versatility and Efficiency in Software Development Makurdi Manuel Ernesto | @manuelernest0 

Makurdi What is Kotlin 

Kotlin is a cross-platform, statically typed, general-purpose programming language with type inference developed by JetBrains. Kotlin interoperates fully with Java, and it can be used to write Android apps, IOS apps*, web applications, and other types of software. Makurdi 

Kotlin is a programming language that makes coding concise, cross-platform, and fun. 

2016 2021 2022 2023 2024 Kotlin releases Kotlin 1.0 15 Feb Kotlin 1.8.20 “Lang ver 2.0” Kotlin 1.9.x K2 Beta Compose & KSP Kotlin 2.0 K2 Default Kotlin 1.7.0 K2 Alpha Kotlin 2.0 & K2 Kotlin 1.5 

Highlights of Companies Adopting Kotlin 

Makurdi Why Kotlin 🤔 

Kotlin is designed to be fully interoperable with Java, allowing developers to leverage existing Java libraries, frameworks, and tools. Makurdi Interoperability with Java 

Makurdi Calling Java from Kotlin import java.util.* fun demo(source: List) { val list = ArrayList() // 'for'-loops work for Java collections: for (item in source) { list.add(item) } // Operator conventions work as well: for (i in 0..source.size - 1) { list[i] = source[i] // get and set are called } } 

Kotlin's syntax is concise and expressive, reducing boilerplate code and enhancing code readability. Makurdi Conciseness and Readability 

Makurdi Data class /** * no need to define get, set, toString ... */ data class Address(var street: String, var streetNumber: Int, var postCode: String, var city: String, var country: Country) 

Kotlin introduces coroutines, which simplify asynchronous programming and make it more readable. Makurdi Coroutines for Asynchronous Programming 

Makurdi Async with Coroutines import kotlinx.coroutines.* suspend fun main() { // A function that can be suspended and resumed later val start = System.currentTimeMillis() coroutineScope { // Create a scope for starting coroutines for (i in 1..10) { launch { // Start 10 concurrent tasks delay(3000L - i * 300) // Pause their execution log(start, "Countdown: $i") } } } // Execution continues when all coroutines in the scope have finished log(start, "Liftoff!") } 

Kotlin supports extension functions, allowing developers to add new functions to existing classes without modifying their source code. Makurdi Extension Functions 

Makurdi Extension Functions fun MutableList.swap(index1: Int, index2: Int) { val tmp = this[index1] // 'this' corresponds to the list this[index1] = this[index2] this[index2] = tmp } val list = mutableListOf(1, 2, 3) list.swap(0, 2) // 'this' inside 'swap()' will hold the value of 'list' 

KMP allows developers to share code between different platforms, such as JVM and native. Makurdi Multiplatform Development 

The community around Kotlin is active, providing support, tutorials, and resources. Makurdi Growing Ecosystem 

Makurdi Null Safety 

Makurdi Null Safety Functional Programming Features 

Makurdi Null Safety Functional Programming Features Tooling Support 

Makurdi How Kotlin 🤔 

Makurdi Kotlin for Android 

Makurdi Kotlin for Android 

Makurdi Kotlin for Android 

Makurdi Compose function import androidx.compose.foundation.layout.Column @Composable fun MessageCard(msg: Message) { Column { Text(text = msg.author) Text(text = msg.body) } } 

Makurdi Kotlin Multiplatform (KMP) Share a piece of logic 

Makurdi Kotlin Multiplatform (KMP) Share logic and keep the UI native 

Makurdi Kotlin Multiplatform (KMP) Share up to 100% of the code 

Makurdi Server-side Combine the world’s most popular JVM framework with Kotlin and make the ultimate combo for application development. 

Makurdi Server-side Ktor is a multiplatform toolkit built by JetBrains for creating Web applications in Kotlin. It makes use of coroutines for high scalability and offers an easy-to-use API. 

Thanks Makurdi