How do we add generic class as Map value ? I am d...

# getting-started

[am]

How do we add generic class as Map value ?

I am defining class named

abstract class CardHolder<T:RecyclerView.ViewHolder>{

    lateinit var actionListener: CardActionListener

    abstract fun onCreateViewHolder(parent: ViewGroup): T

    abstract fun onBindViewHolder(holder:T, card: Card, position: Int)
}

which will be extended to do inflationa and other formalities to display data,

class NewCardDelegate:CardViewHolder<NewHolder>{
	//Rest of code
}

the reason I was doing this so that I could define a mutableMap<Int,CardHolder> and reduce the Adapter class

val map =mutableMapOf<Int,CardHolder>
map[25] = NewCard() //error

but it seems like its not right way
Please guide me for any other better way

[karelpeeters]

You need CardHolder<*> as the map value type.

[am]

ooh what is this term called @karelpeeters

[am]

*

[Pavlo Liapota]

https://kotlinlang.org/docs/reference/generics.html#star-projections