Jgomo3::Func

By requiring this Gem, some extensions will be applied to Ruby core classes (similar to what Activesupport does).

require 'jgomo3/func'

The extensions is a collection of methods I find useful for any project. This is a quick list:

then_if and then_unless

Whenever you use then guarded by some simple ternary logic, ej:

number.then { _1.positive? ? _1 * 1000 : _1 }

you can use then_if (or then_unless):

number.then_if(:positive?) { _1 * 1000 }
number.then_if(->(x){ x.positive? }) { _1 * 1000 }

then_if and then_unless receive an argument which will be used as a function, first by verifying it responds to call, lastly, by trying to convert it to a Proc. That's why this method works with Symbols, because they respond to to_proc.

complement

Generates a Proc that negates the object if it would have been used as a function.

negative = :positive?.complement
negative.call(1) # => false
negative.call(-1) # => true

complement will use the receiver as a function first by verifying it responds to call it, lastly, by trying to convert it to a Proc. That's why this method works with Symbols, because they respond to to_proc.

constantly

Generates a Proc that always returns it's receiver.

constantly_true = true.constantly
constantly_true.call(12345) # => true
constantly_true.call('Hola') # => true
constantly_true.call(nil) # => true
constantly_true.call(Object.new) # => true

Installation

Add this line to your application's Gemfile:

gem 'jgomo3-func'

And then execute:

$ bundle install

Or install it yourself as:

$ gem install jgomo3-func

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/[USERNAME]/jgomo3-func. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the 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 Jgomo3::Func project's codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.