Optionar

Welcome to your new gem! In this directory, you'll find the files you need to be able to package up your Ruby library into a gem. Put your Ruby code in the file lib/optionar. To experiment with that code, run bin/console for an interactive prompt.

Do you like nil?

Add this line to your application's Gemfile:

gem 'optionar'

And then execute:

$ bundle

Or install it yourself as:

$ gem install optionar

value = 100 # or nil
some = Optionar::some(value)
new_some = some.map{|s| s+50}
    .map{|s| s+50}
    .map{|s| s+50}
puts new_some.unwrap() # 250 or nil

value2 = nil
some2 = Optionar::some(value2)
new_some2 = some2.map_or(50){|s| s+50}
puts new_some2.unwrap() # 100

# Look at test for detail.

After checking out the repo, run bin/setup to install dependencies. Then, run rake test 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]/optionar.

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