Hi guys I m having trouble understanding the difference betw kotlinlang #getting-started

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Title

a

Arnau Díaz

10/22/2019, 8:13 AM

Hi guys, I'm having trouble understanding the difference between these: With abstract class:

abstract class ParentObject(val id: Int)
class ChildObject(id: Int, val value: String) : ParentObject(id)

With adt/sealed class it doesn't compile:

sealed class ParentObject(val id: Int)
data class ChildObject(id: Int, val value: String) : ParentObject(id)

Is there any way to get it working in Kotlin? I want the benefits of the data classes but there are some fields that are common for all my subtypes.

s

spand

10/22/2019, 8:15 AM

sealed class ParentObject {
    abstract val id: Int
}
data class ChildObject(override val id: Int, val value: String) : ParentObject()

👍 1

a

Arnau Díaz

10/22/2019, 8:18 AM

Thank you for your quick reply- I was trying to follow the compiler error and use the "overriding" somewhere 🙂 but I couldn't get it to work.

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