pfmerge #

Merges multiple HyperLogLog data structures into an unique HyperLogLog structure stored at key, approximating the cardinality of the union of the source structures.

[Redis documentation]

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pfmerge(key, sources, [options], callback) #

Arguments	Type	Description
key	string	Destination key identifier
sources	string	List of HyperLogLog source key identifiers
options	JSON Object	Optional parameters
callback	function	Callback

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Options #

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

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Callback Response #

Returns null if successful.

Usage #

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String[] keys = new String[]{"key1", "key2", "..."};
kuzzle.memoryStorage.pfmerge('key', keys, new ResponseListener<Void>() {
  @Override
  public void onSuccess(Void v) {
    // callback called once the action has completed
  }
  @Override
  public void onError(JSONObject error) {
  }
});