A "deep" version of Rails' Hash#transform_values

hash_deep_transform_values.rb

class Hash
  class Hash
    def deep_transform_values(&block)
      reduce({}) do |result, (k, v)|
        result[k] = v.is_a?(Hash) ? v.deep_transform_values(&block) : yield(v)
        result
      end
    end
  end
end

Hola, i have a question for you.

I've implemented it while ago as

class Hash

  def deep_transform_values(&block)
    self.transform_values do |value|
      value.is_a?(Hash) ? value.deep_transform_values(&block) : yield(value)
    end
  end

end

i'm not sure what solution is clearer. why do you use reduce for that? Both solutions create new copy of hash..

To anyone else who reaches this page: v can be an array.