Class: BloomFilter::Filter

Inherits:
Object
  • Object
show all
Defined in:
lib/bloomfilter/filter.rb

Direct Known Subclasses

CountingRedis, Native, Redis

Instance Method Summary collapse

Instance Method Details

#stats ⇒ Object 



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# File 'lib/bloomfilter/filter.rb', line 3

def stats
  fp = ((1.0 - Math.exp(-(@opts[:hashes] * size).to_f / @opts[:size])) ** @opts[:hashes]) * 100
  printf "Number of filter buckets (m): %d\n" % @opts[:size]
  printf "Number of bits per buckets (b): %d\n" % @opts[:bucket]
  printf "Number of filter elements (n): %d\n" % size
  printf "Number of filter hashes (k) : %d\n" % @opts[:hashes]
  printf "Raise on overflow? (r) : %s\n" % @opts[:raise].to_s
  printf "Predicted false positive rate = %.2f%\n" % fp
end