redis-hll

redis-hll

A Redis backed HyperLogLog implementation for node.js, basically ported from hyperloglog-redis.

$3

``sh
npm install redis-hll
`

$3

`js
// dependencies

var redis = require('redis').createClient();
var hll = require('redis-hll')(redis);
var assert = require('assert');

// create a new counter

var counter = hll.counter('beatles');

// add some values

var beatles = ['john', 'paul', 'george', 'ringo', 'john', 'paul'];
var n = beatles.length;

beatles.forEach(function(beatle){
counter.add(beatle, function(err){
if (err) return next(err);
--n || next();
});
});

// fetch the cardinality of the hll

function next(err){
if (err) return console.error(err);
counter.count(function(err, total){
if (err) return console.error(err);
assert(4 === total);
});
}
``

$3

- test tons of values
- unions
- intersections
- refactor

$3

MIT