enum class Color { RED, GREEN, BLUE }

// *** before: ***
val allOld: Array<Color> = Color.values()   // a new array on every call,
                                            // and the caller could change it

// *** in version 1.9: ***
val all = Color.entries                     // a read-only list, built once

fun main() {
    for (c in Color.entries) println(c)
    println(Color.entries.map { it.name })
    println(Color.entries.first())
    println(Color.entries.size)
    println(allOld.size)
}