Question

I have a flat Hash:

hash = Hash["prop_one" => 100, "prop_two" => 200, "prop_three" => 300]  

I have wrapped it in a class, with the class exposing these values to be read through accessors:

class WrappedHash

  def prop_one
    config['prop_one']
  end

  def prop_two
    config['prop_two']
  end  

  def prop_three
    config['prop_three']
  end

  def initialize(config)
    self.config = config
  end

end

Is there a way to proxy requests for these properties to the hash without having to manually add accessors? (It’s a big hash)

Answer 1

use OpenStruct if you have dynamic hash keys or Struct if keys are static and performance is important.

OpenStruct can be converted back to Hash by its marshal_dump method