infix fun <T> Comparator<T>.thenDescending( comparator: Comparator<in T> ): Comparator<T>
Combines this comparator and the given comparator such that the latter is applied only when the former considered values equal.
import kotlin.test.*
fun main(args: Array<String>) {
//sampleStart
val list = listOf("A", "aa", "b", "bb", "a")
val lengthThenCaseInsensitive = compareBy<String> { it.length }
.thenDescending(String.CASE_INSENSITIVE_ORDER)
val sorted = list.sortedWith(lengthThenCaseInsensitive)
println(sorted) // [b, A, a, bb, aa]
//sampleEnd
}
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https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.comparisons/then-descending.html