sdiffstore #

Computes the difference between the set of unique values stored at key and the other provided sets, and stores the result in the key stored at destination.

If the destination key already exists, it is overwritten.

[Redis documentation]

sdiffstore(key, keys, destination, [options], [callback]) #

Arguments	Type	Description
`key`	string	Key identifier to compare
`keys`	array	list of set keys to compare with the set stored at `key`
`destination`	string	Destination key identifier
`options`	JSON Object	Optional parameters
`callback`	function	Callback

Options #

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

Return Value #

Returns the MemoryStorage object to allow chaining.

Callback Response #

Returns an integer containing the number of stored elements.

Usage #

// Using callbacks (NodeJS or Web Browser)
kuzzle.memoryStorage.sdiffstore('key', ['key1', 'key2', '...'], 'destination', function (err, count) {
  // callback called once the action has completed
});
// Using promises (NodeJS only)
kuzzle.memoryStorage.sdiffstorePromise('key', ['key1', 'key2', '...'], 'destination')
  .then(count => {
    // resolved once the action has completed
  });

Callback response: