foldIndexed<R> method

*<Null safety>*

R foldIndexed <R>(R initialValue, R combine(int index, R previous, T element))

Implementation

R foldIndexed<R>(
    R initialValue, R Function(int index, R previous, T element) combine) {
  var result = initialValue;
  var index = 0;
  for (var element in this) {
    result = combine(index++, result, element);
  }
  return result;
}