Continue
This gem was created to help with situations where a chain or pipeline of commands are run. Where a command encounters an error it can prevent remaining commands from being run.
For example,
Continue::Run [
Continue::Command() {|val| do_something_ok ? true : false },
Continue::Command() {|val| do_something_else; true }
]
For a lower level interface, a lambda can be provided. By convention the lambda requires three parameters, a proc to be called on success, a proc to be called on error, and a value object that can be used for shared context between the commands.
Continue::Run [
->(s,e,v) { do_the_first_thing ? s.call : e.call },
->(s,e,v) { do_the_second_thing ? s.call : e.call },
->(s,e,v) { do_the_third_thing ? s.call : e.call }
]
This may help replace nested if statement code that looks like,
if do_the_first_thing
if do_the_second_thing
if do_the_third_thing
handle_success
else
handle_error
end
else
handle_error
end
else
handle_error
end
Installation
Add this line to your application's Gemfile:
gem 'continue'
And then execute:
$ bundle
Or install it yourself as:
$ gem install continue
Usage
TODO: Write usage instructions here
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 tags, and push the .gem
file to rubygems.org.
Contributing
Bug reports and pull requests are welcome on GitHub at https://github.com/carld/continue. 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.
License
The gem is available as open source under the terms of the MIT License.
Code of Conduct
Everyone interacting in the Continue project’s codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.