Method __iterator

src/Seq.js:231–243

(type, reverse)

  }

  __iterator(type, reverse) {
    const object = this._object;
    const keys = this._keys;
    const size = keys.length;
    let i = 0;
    return new Iterator(() => {
      if (i === size) {
        return iteratorDone();
      }
      const key = keys[reverse ? size - ++i : i++];
      return iteratorValue(type, key, object[key]);
    });
  }
}
ObjectSeq.prototype[IS_ORDERED_SYMBOL] = true;