Method keys

src/lualib/Map.ts:136–155

()

    }

    public keys(): IterableIterator<K> {
        const getFirstKey = () => this.firstKey;
        const nextKey = this.nextKey;
        let key: K | undefined;
        let started = false;
        return {
            [Symbol.iterator](): IterableIterator<K> {
                return this;
            },
            next(): IteratorResult<K> {
                if (!started) {
                    started = true;
                    key = getFirstKey();
                } else {
                    key = nextKey.get(key!);
                }
                return { done: !key, value: key! };
            },
        };
    }

    public values(): IterableIterator<V> {
        const getFirstKey = () => this.firstKey;