Generics

Generics.kt

class MutableStack<E>(vararg items: E) {

    private var elements = items.toMutableList()

    fun push(element: E) = elements.add(element)

    fun peek(): E = elements.last()

    fun pop(index: Int): E = elements.removeAt(index)

    fun isEmpty() = elements.isEmpty()

    fun size() = elements.size

    override fun toString() = "MutableStack(${elements.joinToString()})"

}


fun <E> mutableStackOf(vararg elements: E) = MutableStack(*elements)

fun main() {

    val stack = mutableStackOf(1, 2, 3, 4, 5, 6)

    print(stack)
}