Method set

javascript/0981-time-based-key-value-store.js:19–25

* @param {string} key * @param {string} value * @param {number} timestamp * Time O(1) | Space O(1) * @return {void}

(key, value, timestamp)

     * @return {void}
     */
    set(key, value, timestamp) {
        const bucket = this.map[key] || [];

        this.map[key] = bucket;

        bucket.push([value, timestamp]);
    }

    /**
     * @param {string} key