Stupendous Permutations

Sperm is a random permutations generator based on the ideas of group theory that allows you to generate very large permutations without extra memory consumption.

Add this line to your application's Gemfile:

gem 'sperm'

And then execute:

$ bundle

Or install it yourself as:

$ gem install sperm

Sperm.rand(5).each { |element| puts element }

This is a shorthand for:

Sperm::RandomPermutations.new(5).rand.each { |element| puts element }

You can also use your own source of randomness:

Sperm::RandomPermutations.new(5, Random.new(42))
Sperm::RandomPermutations.new(10**8, SecureRandom)

Copyright © 2014 Arthur Khashaev. See LICENSE.txt for details.