DeepMergeExistingKeys

Extends Rails's deep_merge method to merge only existing keys.

Add this line to your application's Gemfile:

gem 'deep_merge_existing_keys'

And then execute:

$ bundle

Or install it yourself as:

$ gem install deep_merge_existing_keys

old_hash = { a: 10, b: 20, c: { c1: 30, c2: { c2a: 40 } } }
new_hash = { b: 25, c: { c1: 35, c2: { c2b: 55 } }, d: 65 }

merged_hash = old_hash.deep_merge_existing_keys new_hash
merged_hash # { a: 10, b: 25, c: { c1: 35, c2: { c2a: 40 } }

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

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

Everyone interacting in the DeepMergeExistingKeys project’s codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.