filterTo

Common
JVM
JS
Native
1.0
inline fun < T , C : MutableCollection < in T > > Sequence < T > . filterTo (
destination : C ,
predicate : ( T ) -> Boolean
) : C

(source)

Appends all elements matching the given predicate to the given destination .

The operation is terminal .

import kotlin.test.*

fun main(args: Array<String>) {
//sampleStart
val numbers: List<Int> = listOf(1, 2, 3, 4, 5, 6, 7)
val evenNumbers = mutableListOf<Int>()
val notMultiplesOf3 = mutableListOf<Int>()

println(evenNumbers) // []

numbers.filterTo(evenNumbers) { it % 2 == 0 }
numbers.filterNotTo(notMultiplesOf3) { number -> number % 3 == 0 }

println(evenNumbers) // [2, 4, 6]
println(notMultiplesOf3) // [1, 2, 4, 5, 7]
//sampleEnd
}