sismember

Checks if member is a member of the set of unique values stored at key.

[Redis documentation]


sismember(key, member, [options], callback)

Arguments Type Description
key string Key identifier
member string Value tested against the set of unique values
options JSON Object Optional parameters
callback function Callback

Options

Option Type Description Default
queuable boolean Make this request queuable or not true

Callback Response

Returns a boolean specifying if member is a member of the set or not.

Usage

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// Using callbacks (NodeJS or Web Browser)
kuzzle.memoryStorage.sismember('key', 'member', function (err, isMember) {
  // callback called once the action has completed
});

// Using promises (NodeJS only)
kuzzle.memoryStorage.sismemberPromise('key', 'member')
  .then(isMember => {
    // resolved once the action has completed
  });

Callback response:

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true