Kotlin Everywhere: Versatility and Efficiency in Software Development

'Kotlin Everywhere: Versatility and Efficiency in Software Development' is a talk given at DevFest 2023 by GDG Makurdi. It shows the versatility and efficiency when using Kotlin to develop powerful software.

Transcript

1. Kotlin Everywhere: Versatility and Efficiency in Software Development Makurdi Manuel Ernesto | @manuelernest0
2. Makurdi What is Kotlin
3. 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
4. Kotlin is a programming language that makes coding concise, cross-platform, and fun.
5. 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
6. Highlights of Companies Adopting Kotlin
7. Makurdi Why Kotlin 🤔
8. Kotlin is designed to be fully interoperable with Java, allowing developers to leverage existing Java libraries, frameworks, and tools. Makurdi Interoperability with Java
9. Makurdi Calling Java from Kotlin import java.util.* fun demo(source: List<Int>) { val list = ArrayList<Int>() // '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 } }
10. Kotlin's syntax is concise and expressive, reducing boilerplate code and enhancing code readability. Makurdi Conciseness and Readability
11. 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)
12. Kotlin introduces coroutines, which simplify asynchronous programming and make it more readable. Makurdi Coroutines for Asynchronous Programming
13. 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!") }
14. Kotlin supports extension functions, allowing developers to add new functions to existing classes without modifying their source code. Makurdi Extension Functions
15. Makurdi Extension Functions fun MutableList<Int>.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'
16. KMP allows developers to share code between different platforms, such as JVM and native. Makurdi Multiplatform Development
17. The community around Kotlin is active, providing support, tutorials, and resources. Makurdi Growing Ecosystem
18. Makurdi Null Safety
19. Makurdi Null Safety Functional Programming Features
20. Makurdi Null Safety Functional Programming Features Tooling Support
21. Makurdi How Kotlin 🤔
22. Makurdi Kotlin for Android
23. Makurdi Kotlin for Android
24. Makurdi Kotlin for Android
25. Makurdi Compose function import androidx.compose.foundation.layout.Column @Composable fun MessageCard(msg: Message) { Column { Text(text = msg.author) Text(text = msg.body) } }
26. Makurdi Kotlin Multiplatform (KMP) Share a piece of logic
27. Makurdi Kotlin Multiplatform (KMP) Share logic and keep the UI native
28. Makurdi Kotlin Multiplatform (KMP) Share up to 100% of the code
29. Makurdi Server-side Combine the world’s most popular JVM framework with Kotlin and make the ultimate combo for application development.
30. 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.
31. Thanks Makurdi