gistfile1.rb

class Hash

  def nested_each_pair
    self.each_pair do |k,v|
      if v.is_a?(Hash)
        v.nested_each_pair {|k,v| yield k,v}
      else
        yield(k,v)
      end
    end
  end

end

{"root"=>{:a=>"tom", :b=>{:c => 1, :x => 2}}}.nested_each_pair{|k,v|
  puts k
  puts v
}


class Hash

  def nested_with_array_each_pair
    self.each do |k,v|
      if v.is_a?(Hash)
        v.nested_with_array_each_pair {|c,d| yield c,d}
      elsif v.is_a?(Array)
        v.each do |item|
          if item.is_a?(Hash)
            item.nested_with_array_each_pair { |a,b| yield a, b }
          else
            yield k,item
          end
        end
      else
        yield(k,v)
      end
    end
  end
end

h = {"root"=>{:a=>"tom", :b=>{:c => [1,3,:bb => [80,90]], :x => [{:d => {:e => 'nested deep'}},3,4]}}}

h.nested_with_array_each_pair{|k,v|
  puts "key: #{k} and value: #{v}"
}