flarp.rb

class Hash
  def flarp(h = {}, prefix = nil)
    each do |k, v|
      new_k = [prefix, k].compact.join(".")

      if v.is_a?(Array) || v.is_a?(Hash)
        v.flarp(h, new_k)
      else
        h[new_k] = v
      end
    end

    h
  end
end

class Array
  def flarp(h = {}, prefix = nil)
    each_with_index do |v, i|
      new_k = [prefix, i].compact.join(".")

      if v.is_a?(Array) || v.is_a?(Hash)
        v.flarp(h, new_k)
      else
        h[new_k] = v
      end
    end

    h
  end
end