johansenja / weakest_link

Continuous safe-navigation operator chaining in Ruby, without the repetition

WeakestLink

Weakest link is a very lightweight gem which allows you to safely chain multiple methods together, without having to repeat the safe navigation operator for each call.

Example

Standard ruby

my_array = rand > 0.5 ? [] : ['foo']
my_array.first&.length&.split&.join(" ")&.reverse # etc

Weakest Link

require 'weakest_link'
my_array = rand > 0.5 ? [] : ['foo']
# start and end the sequence of safe calls with :£
my_array.£.first.length.split.join(" ").reverse.£ # etc

If £ is not a convenient character, or you would prefer something else, you can also configure other aliases:

WeakestLink.aliases = %i[€ foo]
my_array.€.first.length.split.join(" ").reverse.€ # etc
my_array.foo.first.length.split.join(" ").reverse.foo # etc

Installation

Add this line to your application's Gemfile:

gem 'weakest_link'

And then execute:

$ bundle install

Or install it yourself as:

$ gem install weakest_link

Development

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 the created tag, and push the .gem file to rubygems.org.

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/johansenja/weakest_link.

License

The gem is available as open source under the terms of the MIT License.