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 .
import kotlin.test.*
fun main(args: Array<String>) {
//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
}