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Important: This documentation is about an older version. It's relevant only to the release noted, many of the features and functions have been updated or replaced. Please view the current version.

DocumentationGrafana k6JavaScript APIk6/experimentalredisClientClient.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

ParameterTypeDescription
keystringkey holding the list to get the length of.

Returns

TypeResolves withRejected 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');
      }
    });
}