Menu
Open source
Client.llen(key)
Returns the length of the list stored at key
. If key
does not exist, it is interpreted as an empty list and 0 is returned.
Parameters
Parameter | Type | Description |
---|---|---|
key | string | key holding the list to get the length of. |
Returns
Type | Resolves with | Rejected when |
---|---|---|
Promise<number> | On success, the promise resolves with the length of the list at key . | If the list does not exist, the promise is rejected with an error. |
Example
JavaScript
import redis from 'k6/experimental/redis';
// Instantiate a new redis client
const redisClient = new redis.Client('redis://localhost:6379');
export default function () {
redisClient
.rpush('mylist', 'first')
.then((_) => redisClient.rpush('mylist', 'second'))
.then((_) => redisClient.rpush('mylist', 'third'))
.then((_) => redisClient.llen('mylist'))
.then((length) => {
if (length !== 3) {
throw new Error('llen operations should have returned 3');
}
});
}
Was this page helpful?
Related resources from Grafana Labs
Additional helpful documentation, links, and articles:
Video
Performance testing and observability in Grafana Cloud
In this webinar, learn how Grafana Cloud k6 offers you the best developer experience for performance testing.
User-centered observability: load testing, real user monitoring, and synthetics
Learn how to use load testing, synthetic monitoring, and real user monitoring (RUM) to understand end users' experience of your apps. Watch on demand.