splitBetweenIndexed method

*<Null safety>*

Iterable<List<T>> splitBetweenIndexed (bool test(int index, T first, T second))

Implementation

Iterable<List<T>> splitBetweenIndexed(
    bool Function(int index, T first, T second) test) sync* {
  var iterator = this.iterator;
  if (!iterator.moveNext()) return;
  var previous = iterator.current;
  var chunk = <T>[previous];
  var index = 1;
  while (iterator.moveNext()) {
    var element = iterator.current;
    if (test(index++, previous, element)) {
      yield chunk;
      chunk = [];
    }
    chunk.add(element);
    previous = element;
  }
  yield chunk;
}