minByOrNull
inline
fun
<
R
:
Comparable
<
R
>
>
CharSequence
.
minByOrNull
(
selector
:
(
Char
)
->
R
)
:
Char
?
(source)
Returns the first character yielding the smallest value of the given function or
null
if there are no characters.
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
}