rbtree2

RB-Trees supported Ruby2 - originally by OZAWA Takuma
http://www.geocities.co.jp/SiliconValley-PaloAlto/3388/rbtree/README.html

Add this line to your application's Gemfile:

gem 'rbtree2'

And then execute:

$ bundle

Or install it yourself as:

$ gem install rbtree2

require 'rbtree2'

# same usage as rbtree gem
tree = RBTree.new

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