kotlin-stdlib/kotlin.sequences/minByOrNull

minByOrNull

inline fun <T, R : Comparable<R>> Sequence<T>.minByOrNull(selector: (T) -> R): T?(source)

Returns the first element yielding the smallest value of the given function or null if there are no elements.

The operation is terminal.

Since Kotlin

1.4

Samples

import kotlin.test.*

fun main() { 
   //sampleStart 
   val list = listOf("abcd", "abc", "ab", "abcde")
val shortestString = list.minByOrNull { it.length }
println(shortestString) // ab

val emptyList = emptyList<String>()
val emptyMin = emptyList.minByOrNull { it.length }
println(emptyMin) // null 
   //sampleEnd
}