An extension to the Fisher-Yates-Shuffle algorithm to support weights. It includes a ruby core extension convenience of arrays.

Add this line to your application's Gemfile:

gem 'weighted_shuffle'

And then execute:

$ bundle

Or install it yourself as:

$ gem install weighted_shuffle

standalone usage:

array = [[:a, 1], [:b, 2]] # 1, 2 are weights
dealer = WeightedShuffle::Dealer.new array

dealer.weighted_shuffle
=> [:b, :a]

integrated into ruby Array:

require 'weighted_shuffle/core_ext/array/weighted_shuffle'

array = [[:a, 1], [:b, 2]]
array.weighted_shuffle
=> [:b, :a]

or with factor

array.weighted_shuffle factor: 3

1. Fork it
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create new Pull Request