kotlin-stdlib/kotlin.collections/sortBy

sortBy

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

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

The sort is stable. It means that elements for which selector returned equal values preserve their order relative to each other after sorting.

Since Kotlin

1.0
inline fun <T, R : Comparable<R>> MutableList<T>.sortBy(crossinline selector: (T) -> R?)(source)

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

The sort is stable. It means that elements for which selector returned equal values preserve their order relative to each other after sorting.

Since Kotlin

1.0