30 August 2023
Once you have a solid grasp of Kotlin syntax and basics, it's time to take your skills to an advanced level. This guide will walk you through more sophisticated Kotlin features and techniques used by experienced developers.
We'll cover topics like functional programming, coroutines, generics, DSLs, and Kotlin for multiplatform development. Buckle up - things are about to get more complex!
To get started for you or your team, consider taking JBI Trainings Kotlin Course.
Kotlin supports several functional programming concepts that allow you to write cleaner, more maintainable code:
These are functions that can take other functions as parameters, or return functions as values. For example:
fun main() { val result = operateOnNumber(5, ::square) println(result) // 25 } fun operateOnNumber(num: Int, operation: (Int) -> Int): Int { return operation(num) } fun square(x: Int) = x * x
Higher-order functions enable passing behavior as parameters.
Lambdas are anonymous functions that can be passed around. For example:
val sum = { x: Int, y: Int -> x + y } println(sum(1, 2)) // 3
Lambdas are concise syntax for utilizing functional concepts.
Marking classes and variables as immutable makes code clearer and safer. Use val
instead of var
, and copy objects when mutating.
These are functions that always return the same value for a given input, without side effects. Strive to write pure functions when possible.
Coroutines allow you to write asynchronous code that looks synchronous. Some examples:
launch { // runs asynchronously } async { // returns a Future } withContext(Dispatchers.IO) { // runs in background thread }
Coroutines simplify async code like making network calls.
Generics enable reusable code that can work for multiple data types. For example:
class Box<T>(val value: T) fun main() { val stringBox = Box<String>("Text") val intBox = Box<Int>(5) }
The Box
class supports any type while ensuring type safety.
Kotlin makes it easy to create domain-specific languages (DSLs) with custom syntax. For example, a build configuration DSL:
build { name "My App" dependencies { implementation "org.jetbrains.kotlin:kotlin-stdlib" } }
DSLs provide fluent, readable APIs for specific use cases.
Kotlin Multiplatform allows sharing code between platforms like JVM, JavaScript, and Native. For example:
expect fun today(): String expect class Date { fun getDayOfMonth(): Int } // Common code fun isLeapYear(year: Int): Boolean
Write shared logic once, compile everywhere.
Additionally, experienced Kotlin developers follow these best practices:
Following conventions optimizes your Kotlin codebase.
Here are some excellent resources to take your Kotlin skills to advanced levels:
Immerse yourself in these resources to become an expert Kotlin developer.
To cement your advanced Kotlin skills, use it to build real production systems:
Building real-world projects will improve your abilities and give practical experience.
With these advanced concepts, you're well on your way towards Kotlin mastery. Some final tips:
Keep learning, share your knowledge, and enjoy building with Kotlin!
Kotlin is a feature-rich modern language that scales from basics to advanced techniques. This guide gave you a tour of advanced Kotlin - from functional concepts like immutability and coroutines, to leveraging generics, DSLs and multiplatform code. Master these skills to become a well-rounded Kotlin developer.
With these Kotlin basics, you can start tackling real projects. Kotlin has a gentle learning curve while teaching you skills that apply anywhere Java is used. The language improves developer productivity and makes creating applications safer.
Now that you have a Kotlin foundation, you can constantly build on it through practice, taking courses, joining communities and exploring frameworks. Your journey to learn Kotlin has just begun!
Check out our article on How to Get Started with Kotlin: A Step-by-Step Guide for Beginners
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Whether initiating an exploration of infrastructure-as-code or enhancing an existing Kotlin-based setup, our comprehensive training modules at JBI Training stand ready to facilitate your mastery of this robust framework. Delay no more; adopt the prowess of infrastructure-as-code to revolutionize your infrastructure workflows without delay.
Initiate your educational journey now with the Kotlin courses at JB International and unlock the boundless potential of infrastructure-as-code at your disposal. Our offerings include:
Enrol in these courses and embark on a transformative journey to harness the power of Kotlin and infrastructure-as-code. Empower yourself to create, manage, and optimise digital infrastructures with confidence and expertise.
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