filter
fun <T> Sequence<T>.filterIndexed(predicate: (index: Int, T) -> Boolean): Sequence<T>
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Returns a sequence containing only elements matching the given predicate.
Samples
import samples.*
import kotlin.test.*
fun main() {
//sampleStart
val numbers: List<Int> = listOf(0, 1, 2, 3, 4, 8, 6)
val numbersOnSameIndexAsValue = numbers.filterIndexed { index, i -> index == i }
assertPrints(numbersOnSameIndexAsValue, "[0, 1, 2, 3, 4, 6]")
//sampleEnd
}Parameters
predicate
function that takes the index of an element and the element itself and returns the result of predicate evaluation on the element.
The operation is intermediate and stateless.