kotlin.collections.sortBy

inline fun <T, R : Comparable<R>> MutableList<T>.sortBy(
    crossinline selector: (T) -> R?)

Sorts elements in the list in-place according to natural sort order of the value returned by specified selector function.

inline fun <T, R : Comparable<R>> Array<out T>.sortBy(
    crossinline selector: (T) -> R?)

Sorts elemen