Triad

A Triad is like a Set, or a collection of three-part arrays.

A Triad is a collection of items each with a key, descriptor, and value.

Each key must be a unique symbol. Each descriptor must be a string. Each value must not be a symbol nor a string.

user = Object.new

map = Triad.new
map << [:admin, 'Admin', user]

map.keys('Admin') #=> [:admin]
map.values('Admin') #=> [user]
map.descriptors('Admin') #=> ['Admin']
# or raise Triad::ItemNotPresent

map.descriptors(user) #=> ['Admin']
map.keys(user) #=> [:admin]
map.values(user) #=> [user]
# or raise Triad::ItemNotPresent

map.values(:admin) #=> [user]
map.descriptors(:admin) #=> ['Admin']
map.keys(:admin) #=> [:admin]
# or raise Triad::ItemNotPresent

map.each do |key, descriptor, value|
  #...
end

Installation

Add this line to your application's Gemfile:

gem 'triad'

And then execute:

$ bundle

Or install it yourself as:

$ gem install triad

Contributing

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