I came up with these general functions: fun forloop(state: S, condition: (s: S) -> Boolean, postExecution: (s: S) -> Unit, block: (s: S) -> Unit) ')Īlthough, in compliance with the language philosophy, you should only use this in rare circumstances. The for loop in Kotlin is used to iterate or cycle though the elements of array, ranges, collections etc. El forEachIndexed () genera los elementos del índice y sus valores. Es una función en línea que acepta una matriz como entrada. Podemos usar la función forEachIndexed () para recuperar el índice actual. However, I needed a traditional for loop (like java) with an immediately terminating state scope, exit condition that evaluates before loop-body execution, and a post-execution operation (my use case was complicated: I needed to repeat using a dynamic exit condition based on a compression routine and powers of 2). Obtenga el índice actual de un elemento en un bucle forEach usando forEachIndexed () en Kotlin. In the following example, we will traverse through the 'Subject' array and we will print the index along with the value.Kotlin is trying to enforce fluent iteration, which covers the vast majority of looping constructs. forEachIndexed is an inline function which takes an array as an input and its index and values are separately accessible.

Nstead of using forEach() loop, you can use the forEachIndexed() loop in Kotlin. forEachIndexed - Kotlin Programming Language JVM JS Native Version 1.8 kotlin-stdlib / llections / forEachIndexed forEachIndexed Common JVM JS Native 1.0 inline fun Array.forEachIndexed( action: (index: Int, T) -> Unit) (source) inline fun ByteArray.

In this article, we will see how we can access the index of an array in Kotlin while using forEach loop. Another option is to maintain a primitive counter, starting with 0, and increment the counter by 1 with each iteration of the loop.

Sometimes it becomes necessary to access the index of an array.

Kotlin for loop with index