zip<B> method

IList<Tuple2<A, B>> zip<B>(IList<B> bs)

Implementation

IList<Tuple2<A, B>> zip<B>(IList<B> bs) {
  final IList<Tuple2<A, B>> abNil = nil();
  if (!(_isCons() && bs._isCons())) {
    return abNil;
  } else {
    final IList<Tuple2<A, B>> result = new Cons(tuple2(this._unsafeHead(), bs._unsafeHead()), abNil);
    var thisCurrent = this._unsafeTail();
    var bsCurrent = bs._unsafeTail();
    var resultCurrent = result;
    while(thisCurrent._isCons() && bsCurrent._isCons()) {
      final next = new Cons(tuple2(thisCurrent._unsafeHead(), bsCurrent._unsafeHead()), abNil);
      resultCurrent._unsafeSetTail(next);
      resultCurrent = next;
      thisCurrent = thisCurrent._unsafeTail();
      bsCurrent = bsCurrent._unsafeTail();
    }
    return result;
  }
}