Creating Kafka consumer using Kotlin is fun - at least they say so, why not to first play with Kotlin idiom and code.
Kotlin Random Playground Code
Trying different code snippets with Kotlin version 1.7.21
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open class Shape
class Rectangle(var height: Double, var length: Double): Shape() {
var perimeter = (height + length) * 2
}
fun maxOf(a: Int, b: Int): Int {
if (a > b) return a else return b
}
fun describe(obj: Any): String =
when (obj) {
1 -> "One"
"Hello" -> "Greeting"
is Long -> "Long"
!is String -> "Not a string"
else -> "Unknown"
}
fun parseInt(str: String): Int? {
return str.toIntOrNull()
}
fun printProduct(arg1: String, arg2: String) {
val x = parseInt(arg1)
var y = parseInt(arg2)
if (x != null && y != null) {
println(x * y)
} else {
println("$arg1 or $arg2 is not a number")
}
}
fun main() {
val fruits = listOf("banana", "avocado", "apple", "kiwifruit")
fruits
.filter { it.startsWith("a") }
.sortedBy { it }
.map { it.uppercase() }
.forEach { println(it) }
printProduct("6", "7")
printProduct("a", "7")
printProduct("a", "b")
}
