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Documentation

Client.llen(key)

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');
      }
    });
}