interface - Kotlin VS Scala: Implement methods with primary constructor parameters -

in scala can write code this.

trait list[t] {    def isempty() :boolean    def head() : t    def tail() : list[t] }  class cons[t](val head: t, val tail: list[t]) :list[t] {    def isempty = false } 

you don't need override tail , head defined, in kotlin had code this.

interface list<t> {    fun isempty() :boolean    fun head() : t    fun tail() : list<t> }  class cons<t>(val head: t, val tail: list<t>) :list<t> {     override fun isempty() = false     override fun head() = head     override fun tail() = tail } 

my question "is better way write kotlin code? "

you can make head , tail properties:

interface list<t> {    val head: t    val tail: list<t>     fun isempty(): boolean }  class cons<t>(override val head: t, override val tail: list<t>) : list<t> {     override fun isempty() = false }