// Using callbacks (NodeJS or Web Browser)
kuzzle.memoryStorage.zlexcount('key', '[b', '[f' function (err, count) {
  // callback called once the action has completed

// Using promises (NodeJS only)
kuzzle.memoryStorage.zlexcountPromise('key', '[b', '[f')
  .then(count => {
    // resolved once the action has completed
kuzzle.memoryStorage.zlexcount("key", "[b", "[f", new ResponseListener<Long>() {
  public void onSuccess(int count) {
    // callback called once the action has completed

  public void onError(JSONObject error) {

use \Kuzzle\Kuzzle;

$kuzzle = new Kuzzle('localhost');

try {
  $count = $kuzzle->memoryStorage()->zlexcount('key', '[b', '[f');
catch (ErrorException $e) {


Callback response:


Counts elements in a sorted set where all members have equal score, using lexicographical ordering. The min and max values are inclusive by default. To change this behavior, please check the syntax detailed in the Redis documentation.

[Redis documentation]

zlexcount(key, min, max, [options], callback)

keystringKey identifier
minstringMinimum member value (inclusive by default)
maxstringMaximum member value (inclusive by default)
optionsJSON ObjectOptional parameters


queuablebooleanMark this request as (not) queuabletrue

Callback response

Resolves to an integer containing the number of elements in the provided lexicographical value range.