fun <T> Array<out Array<out T>>.flatten(): List<T>
Returns a single list of all elements from all arrays in the given array.
import kotlin.test.*
fun main(args: Array<String>) {
//sampleStart
val deepArray = arrayOf(
arrayOf(1),
arrayOf(2, 3),
arrayOf(4, 5, 6)
)
println(deepArray.flatten()) // [1, 2, 3, 4, 5, 6]
//sampleEnd
}fun <T> Iterable<Iterable<T>>.flatten(): List<T>
Returns a single list of all elements from all collections in the given collection.
fun main(args: Array<String>) {
//sampleStart
val deepList = listOf(listOf(1), listOf(2, 3), listOf(4, 5, 6))
println(deepList.flatten()) // [1, 2, 3, 4, 5, 6]
//sampleEnd
}
© 2010–2020 JetBrains s.r.o. and Kotlin Programming Language contributors
Licensed under the Apache License, Version 2.0.
https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.collections/flatten.html