Method keys

src/platform/common/utils/map.ts:361–383

()

    }

    keys(): IterableIterator<K> {
        const map = this;
        const state = this._state;
        let current = this._head;
        const iterator: IterableIterator<K> = {
            [Symbol.iterator]() {
                return iterator;
            },
            next(): IteratorResult<K> {
                if (map._state !== state) {
                    throw new Error(`LinkedMap got modified during iteration.`);
                }
                if (current) {
                    const result = { value: current.key, done: false };
                    current = current.next;
                    return result;
                } else {
                    return { value: undefined, done: true };
                }
            }
        };
        return iterator;
    }

    values(): IterableIterator<V> {
        const map = this;