Just call

hashcode()

? Can you give an example?

that prints a 1 or 2 or 3 digit number depending on what's inside MyClass.

I have something like this: interface MyInterface { fun myHashCode() = "${hashCode()}" } sealed class MyClass : MyInterface { data class MyClass1(val itemId: String) : MyClass() { override fun toString() = myHashCode() } }

The

hashCode

function generated by the data class probably just returns

itemId.hashCode()

and maybe that happens to be

1

for the string you're using?

looks like the former

"the former"? I didn't actually say two separate things 😒imple_smile:

1 printed is an itemId in this case

Can you post a full runnable example?

interface MyInterface { fun myHashCode() = "${hashCode()}" } sealed class MyClass : MyInterface { data class MyClass1(val itemId: Int) : MyClass() { override fun toString() = myHashCode() } } fun main(args: Array<String>) { println(MyClass.MyClass1(2)) }

itemId

is an

Int

, not a

String

. The automatically generated

hashcode

implementation just returns that int as the hashcode.

i see. it's the hashCode implementation that Kotlin data class generates

You're welcome!