Hash Reject Recursively

Like Hash#reject but recursively.

Deletes recursively every key-value pair from hash for which block evaluates to true.

Add this line to your application's Gemfile:

gem 'hash_reject_recursively'

And then execute:

$ bundle

Or install it yourself as:

$ gem install hash_reject_recursively

languages = {
  ruby: { lines: 100 },
  python: { lines: nil },
  java: { lines: nil },
  php: nil
}

new_hash = languages.deep_reject { |key, value| value.nil? }
# new_hash == { ruby: { lines: 100 }, python: {}, java: {} }

new_hash = languages.deep_reject { |key, value| value.blank? } # Rails example
# new_hash == { ruby: { lines: 100 } }

languages.deep_reject! { |key, value| value.nil? }
# languages == { ruby: { lines: 100 }, python: {}, java: {} }

Note 1: deep_reject! changes the original object

Note 2: .blank? in example above it's Rails implementation method.

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

First of all, thank you for wanting to help!

1. Fork it.
2. Create a feature branch - git checkout -b more_magic
3. Add tests and make your changes
4. Check if tests are ok - rake spec
5. Commit changes - git commit -am "Added more magic"
6. Push to Github - git push origin more_magic
7. Send a pull request! ❤️