kotlin-stdlib/kotlin.text/filterIndexedTo

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.

Since Kotlin

1.0

Parameters

predicate

function that takes the index of a character and the character itself and returns the result of predicate evaluation on the character.

Samples

import kotlin.test.*

fun main() { 
   //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
}