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Adds elements to an HyperLogLog data structure.

[Redis documentation]

pfadd(key, elements, [options], [callback])

Arguments Type Description
key string Key identifier
elements array Elements to add to the HyperLogLog structure
options JSON Object Optional parameters
callback function Callback


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 a boolean specifying if the operation was successful or not.


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// Using callbacks (NodeJS or Web Browser)
kuzzle.memoryStorage.pfadd('key', ['foo', 'bar', 'baz'], function (err, status) {
  // callback called once the action has completed
// Using promises (NodeJS only)
kuzzle.memoryStorage.pfaddPromise('key', ['foo', 'bar', 'baz'])
  .then(status => {
    // resolved once the action has completed

Callback response:

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