kotlin sortedby
val list = arrayOf("abc", "d", "efghi", "jklm")
val sorted = list.sortedBy { it.length } //sort by length ascending
//sorted: ["d", "abc", "jklm", "efghi"]
kotlin sortedby sestupně
inline fun <T, R : Comparable<R>> Array<out T>.sortedByDescending(
crossinline selector: (T) -> R?
): List<T>
inline fun <T, R : Comparable<R>> Iterable<T>.sortedByDescending(
crossinline selector: (T) -> R?
): List<T>