flatMapIndexed
@JvmName
(
"flatMapIndexedIterable"
)
inline
fun
<
R
>
CharSequence
.
flatMapIndexed
(
transform
:
(
index
:
Int
,
Char
)
->
Iterable
<
R
>
)
:
List
<
R
>
(source)
Returns a single list of all elements yielded from results of transform function being invoked on each character and its index in the original char sequence.
import kotlin.test.*
fun main(args: Array<String>) {
//sampleStart
val data: List<String> = listOf("Abcd", "efgh", "Klmn")
val selected: List<Boolean> = data.map { it.any { c -> c.isUpperCase() } }
val result = data.flatMapIndexed { index, s -> if (selected[index]) s.toList() else emptyList() }
println(result) // [A, b, c, d, K, l, m, n]
//sampleEnd
}