fun <T> Sequence<Sequence<T>>.flatten(): Sequence<T>
Returns a sequence of all elements from all sequences in this sequence.
The operation is intermediate and stateless.
import kotlin.test.*
fun main(args: Array<String>) {
//sampleStart
val sequence: Sequence<Int> = generateSequence(1) { it + 1 }
val sequenceOfSequences: Sequence<Sequence<Int>> = sequence.map { number ->
generateSequence { number }.take(number)
}
println(sequenceOfSequences.flatten().take(10).toList()) // [1, 2, 2, 3, 3, 3, 4, 4, 4, 4]
//sampleEnd
}@JvmName("flattenSequenceOfIterable") fun <T> Sequence<Iterable<T>>.flatten(): Sequence<T> Returns a sequence of all elements from all iterables in this sequence.
The operation is intermediate and stateless.
import kotlin.test.*
fun main(args: Array<String>) {
//sampleStart
val sequence: Sequence<String> = sequenceOf("123", "45")
val sequenceOfLists: Sequence<List<Char>> = sequence.map { it.toList() }
println(sequenceOfLists.flatten().toList()) // [1, 2, 3, 4, 5]
//sampleEnd
}
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Licensed under the Apache License, Version 2.0.
https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.sequences/flatten.html