Hello, I'm coming to kotlin from typescript and wa...

# announcements

[PandaH.]

Hello, I'm coming to kotlin from typescript and was wondering how to translate this typescript code to kotlin:

// typescript
type ID = String;
function generateId(obj): ID { ...body... }

basically, how to create types like above. i came up with this, but im not sure if its the best way:

// kotlin
class ID : String()
fun generateId(obj: Obj): ID { ...body... }

thank you!

[diesieben07]

That shouldn't even compile, since String is final.
Check out type aliases: https://kotlinlang.org/docs/reference/type-aliases.html

[Jakub Pi]

You can use a typealias which will make ID and String equivalent - you'll be able to compare them and they are considered the same class. The other (preferred) option is a data class:

data class ID(val id: String)

You'll have to access the value via its id property in this case

[PandaH.]

oh ok, thanks!

[Burkhard]

Another option would be an inline class. They are still an experimental feature though.