InjectiveMap

Like a hash, but performs the mappings both ways.

Installation

Add this line to your application's Gemfile:

gem 'injective_map'

And then execute:

$ bundle

Or install it yourself as:

$ gem install injective_map

Usage

map = InjectiveMap.new

map.add(:jill, :jack)
map.add(:marilyn, :joe)
map.add(:melinda, :bill)

map.forward(:jill) # :jack
map.reverse(:joe) # :marilyn
map.forward_image([:jill, :melinda]) # [:jack, :bill]
map.reverse_image([:bill, :jack]) # [:melinda, :jill]

It also includes the Enumerable module, and yields [:from, :to] pairs, eg [:jill, :jack]

TODO

• Add tests.

Contributing

1. Fork it ( https://github.com/cameron-martin/injective_map/fork )
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 a new Pull Request