pfcount

Returns the probabilistic cardinality of a HyperLogLog data structure, or of the merged HyperLogLog structures if more than 1 is provided (see pfadd).

[Redis documentation]

Arguments

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pfcount(keys, [options]);

Arguments Type Description
keys
string[]
List of HyperLogLog keys
options
object
Optional query arguments

options

The options arguments can contain the following option properties:

Property Type (default) Description
queuable
boolean (true)
If true, queues the request during downtime, until connected to Kuzzle again

Resolve

Resolves to the merged HyperLogLog structures cardinality.

Usage

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try {
  await kuzzle.ms.pfadd('hllfoo', ['foo', 'bar', 'baz']);
  await kuzzle.ms.pfadd('hllfoo2', ['hello', 'world', 'foo']);

  // Prints: 5
  console.log(await kuzzle.ms.pfcount(['hllfoo', 'hllfoo2']));
} catch (error) {
  console.error(error.message);
}