SDK
SDK Javascript v5.x
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zunionstore #

Computes the union of the provided sorted sets and stores the result in the destination key.

If the destination key already exists, it is overwritten.

[Redis documentation]


zunionstore(destination, keys, [options], callback) #

Arguments Type Description
destination string Destination key identifier
keys string List of sorted sets to intersect
options JSON Object Optional parameters
callback function Callback

Options #

Option Type Description Default
aggregate string Specify how members' scores are aggregated during the intersection.
Allowed values: min, max, sum
sum
queuable boolean Make this request queuable or not true
weights array Specify a multiplication factor for each input sorted set [1]

Callback Response #

Returns an integer containing the number of members in the stored union.

Usage #

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

Callback response:

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