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

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// 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:

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