filterIndexedTo

Common
JVM
JS
Native
1.0
inline fun <C : Appendable> CharSequence.filterIndexedTo(
    destination: C,
    predicate: (index: Int, Char) -> Boolean
): C

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.