mapNotNull
inline
fun
<
R
:
Any
>
CharSequence
.
mapNotNull
(
transform
:
(
Char
)
->
R
?
)
:
List
<
R
>
(source)
Returns a list containing only the non-null results of applying the given transform function to each character in the original char sequence.
import kotlin.test.*
fun main(args: Array<String>) {
//sampleStart
val strings: List<String> = listOf("12a", "45", "", "3")
val ints: List<Int> = strings.mapNotNull { it.toIntOrNull() }
println(ints) // [45, 3]
println(ints.sum()) // 48
//sampleEnd
}