Enumerate or map through a list with index and value in Dart

Question

In dart there any equivalent to the common:

enumerate(List) -> Iterator((index, value) => f)
or 
List.enumerate()  -> Iterator((index, value) =>          


        

Answer 1

For convenience you can use this extension method.

extension CollectionUtil on Iterable  {

  Iterable mapIndexed(E Function(int index, T item) transform) sync* {
    var index = 0;

    for (final item in this) {
      yield transform(index, item as T);
      index++;
    }
  }
}