filterIndexedTo
inline fun <C : Appendable> CharSequence.filterIndexedTo(
destination: C,
predicate: (index: Int, Char) -> Boolean
): C(source)
Appends all characters matching the given predicate to the given destination.
import kotlin.test.*
fun main(args: Array<String>) {
//sampleStart
val numbers: List<Int> = listOf(0, 1, 2, 3, 4, 8, 6)
val numbersOnSameIndexAsValue = mutableListOf<Int>()
println(numbersOnSameIndexAsValue) // []
numbers.filterIndexedTo(numbersOnSameIndexAsValue) { index, i -> index == i }
println(numbersOnSameIndexAsValue) // [0, 1, 2, 3, 4, 6]
//sampleEnd
}Parameters
predicate - function that takes the index of a character and the character itself
and returns the result of predicate evaluation on the character.