hash_inspection.rb

# An extension to the Hash class to inspect what it is made of
class Hash
  def whatami
    keys.inject({}) do |hash, key|
      hash[key] = case self[key].class.to_s
      when "Hash"
        self[key].whatami
      when "Array"
        self[key].map do |item|
          
          item.is_a?(Hash) ? item.whatami : item.class.to_s
        end
      else
        self[key].class.to_s
      end
    hash
    end
  end
end

# TESTING
require "rubygems"
require "activesupport"

testing = {
  :hash => {:good => "bad"},
  :number => 123123,
  :string => "Hello",
  :arry => [1, 2, 3, {:inside_a_hash => {:inside_another => "what?"}}]
}

puts testing.whatami.to_yaml