You have a week with days and you want to iterate over the week and never met
week = [:mon, :tue, :wed, :thu, :fri, :sat, :sun] week # => :mon week # => :thu week # => :sun week # => nil... stop what?! I need monday!
But it's possible with
require 'circular_array' circular_week = CircularArray[:mon, :tue, :wed, :thu, :fri, :sat, :sun] # It behaves like Array. Basically it inherits Array: circular_week.kind_of? Array # => true # But it is endless: circular_week # => :mon circular_week # => :thu circular_week # => :sun circular_week # => :mon circular_week # => :tue circular_week # => :wed circular_week # => :thu circular_week # => :fri circular_week # => :sat circular_week # => :sun circular_week # => :mon # great!
You can use it for recursive matching, but do not forget to add anti-infinity loop clause
Only for empty collection in returns
empty_circular_array = CircularArray.new() empty_circular_array # => nil
- Matching over a list of possible solutions
- Cycling dates for complex delivery logic
Add this line to your application's Gemfile:
And then execute:
Or install it yourself as:
$ gem install circular_array
After checking out the repo, run
bin/setup to install dependencies. Then, run
rake spec to run the tests. You can also run
bin/console for an interactive prompt that will allow you to experiment.
To install this gem onto your local machine, run
bundle exec rake install. To release a new version, update the version number in
version.rb, and then run
bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the
.gem file to rubygems.org.
Bug reports and pull requests are welcome on GitHub at https://github.com/[USERNAME]/circular_array. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.
The gem is available as open source under the terms of the MIT License.
Code of Conduct
Everyone interacting in the CircularArray project’s codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.