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 #

pfcount(keys, [options]);

string[]

object

options #

The options arguments can contain the following option properties:

boolean (true)

Resolve #

Resolves to the merged HyperLogLog structures cardinality.

Usage #

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);
}