SimpleStore is initialized with file path of YAML file, can be used like Hash, and can be saved to the file.

simplestore.rb

# coding: utf-8

require 'yaml'

class SimpleStore < BasicObject
  attr_reader :file

  def initialize(file)
    @file = file
    if(::File::exist?(file))
      @data ||= ::YAML::load(open(file))
    else
      @data = {}
    end
  end

  def save
    ::File.open(file, 'w') { |f| f.write(::YAML.dump(@data)) }
    self
  end

  def method_missing(*args, &block)
    @data.__send__(*args,&block)
  end

end