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Contents

module Hashie
  module Extensions
    module DeepMerge
      # Returns a new hash with +self+ and +other_hash+ merged recursively.
      def deep_merge(other_hash, &block)
        copy = dup
        copy.extend(Hashie::Extensions::DeepMerge) unless copy.respond_to?(:deep_merge!)
        copy.deep_merge!(other_hash, &block)
      end

      # Returns a new hash with +self+ and +other_hash+ merged recursively.
      # Modifies the receiver in place.
      def deep_merge!(other_hash, &block)
        return self unless other_hash.is_a?(::Hash)
        _recursive_merge(self, other_hash, &block)
        self
      end

      private

      def _recursive_merge(hash, other_hash, &block)
        other_hash.each do |k, v|
          hash[k] =
            if hash.key?(k) && hash[k].is_a?(::Hash) && v.is_a?(::Hash)
              _recursive_merge(hash[k], v, &block)
            elsif hash.key?(k) && block_given?
              yield(k, hash[k], v)
            else
              v.respond_to?(:deep_dup) ? v.deep_dup : v
            end
        end
        hash
      end
    end
  end
end

Version data entries

3 entries across 3 versions & 2 rubygems

Version Path
files.com-1.0.55 docs/vendor/bundle/ruby/2.5.0/gems/hashie-3.6.0/lib/hashie/extensions/deep_merge.rb
hashie-4.0.0 lib/hashie/extensions/deep_merge.rb
hashie-3.6.0 lib/hashie/extensions/deep_merge.rb