Actually it isn't - the documentation says it creates an immutable view of the list. Starting with Dart 2.7, you can use extension methods to extend the functionalities of Iterable instead of having to write helper functions: extension ExtendedIterable on Iterable ) would be really inefficient because it looks like it is converting the list to a map. Print('index: $index, element: $element') The syntax for using the forEachIndexed () function is as follows. The forEachIndexed () outputs the index items and their values. It is an inline function that accepts an array as an input.

Note that unlike javascript's array.map() or C#'s IEnumerable.Select(), the index is the first argument, not the second argument of the callback: import 'package:collection/collection.dart' įinal inputs = įinal indexes = inputs.mapIndexed((index, element) => index).toList() Get the Current Index of an Item in a forEach Loop Using forEachIndexed () in Kotlin We can use the forEachIndexed () function to retrieve the current index. You can use the mapIndexed or forEachIndexed extension methods from the collection package.

For each indexed kotlin