W3cubDocs

/Kotlin

Iterable

Platform and version requirements: JVM (1.0), JS (1.0), Native (1.0)
inline fun <T> Iterable(
    crossinline iterator: () -> Iterator<T>
): Iterable<T>

Given an iterator function constructs an Iterable instance that returns values through the Iterator provided by that function.



fun main(args: Array<String>) {
//sampleStart
val iterable = Iterable {
    iterator {
        yield(42)
        yieldAll(1..5 step 2)
    }
}
val result = iterable.mapIndexed { index, value -> "$index: $value" }
println(result) // [0: 42, 1: 1, 2: 3, 3: 5]

// can be iterated many times
repeat(2) {
    val sum = iterable.sum()
    println(sum) // 51
}
//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/-iterable.html