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filterTo

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

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
}

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Licensed under the Apache License, Version 2.0.
https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.sequences/filter-to.html