igrigorik/bloomfilter-rb — pull request #30 by railsmechanic (2014-02-12 10:15:53+00:00)
Title: optimized #num_set with LUA call and make prefix of key configurable

Outsourced the calculation of CountingRedis#num_set to the Redis server with a simple LUA snippet and make the key prefix ('rbloom') of CountingRedis configurable.

```
bf := BloomFilter::CountingRedis.new(identifier: 'my-bloom')
```