DannyBen/extended_yaml

class ExtendedYAML
  # Hash refinement to allow deep merging of other hashes.
  module DeepMerge
    refine Hash do
      def deep_merge(other_hash, &block)
        dup.deep_merge! other_hash, &block
      end

      def deep_merge!(other_hash, &block)
        merge!(other_hash) do |_key, this_val, other_val|
          if this_val.is_a?(Hash) && other_val.is_a?(Hash)
            this_val.deep_merge(other_val, &block)
          elsif this_val.is_a?(Array) && other_val.is_a?(Array)
            this_val + other_val
          # elsif block_given?
          #   block.call(key, this_val, other_val)
          else
            other_val
          end
        end
      end
    end
  end
end