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]

---

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

---

Options #

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

---

Callback Response #

Returns null if successful.

Usage #

Copied to clipboard!

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