Method __iterator

src/Seq.js:70–84

(type, reverse)

  // abstract __iteratorUncached(type, reverse)

  __iterator(type, reverse) {
    const cache = this._cache;
    if (cache) {
      const size = cache.length;
      let i = 0;
      return new Iterator(() => {
        if (i === size) {
          return iteratorDone();
        }
        const entry = cache[reverse ? size - ++i : i++];
        return iteratorValue(type, entry[0], entry[1]);
      });
    }
    return this.__iteratorUncached(type, reverse);
  }
}

export class KeyedSeq extends Seq {