Money.md

https://github.com/RubyMoney/money

require "i18n" rescue LoadError

module Money::Currency::Loader
  extend self

  DATA_PATH = File.expand_path("../../../../config", __FILE__)

  # Loads and returns the currencies stored in JSON files in the config directory.
  #
  # @return [Hash]
  def load_currencies
    currencies = parse_currency_file("currency.json")
    currencies.merge! parse_currency_file("currency_bc.json")
  end

  private

  def parse_currency_file(filename)
    json = File.read("#{DATA_PATH}/#{filename}")
    json.force_encoding(::Encoding::UTF_8) if defined?(::Encoding)
    JSON.parse(json, :symbolize_names => true)
  end
end

• Comparable module
  • http://ruby-doc.org/core-2.0.0/Comparable.html
• BigDecimal class
  • http://www.ruby-doc.org/stdlib-2.0/libdoc/json/rdoc/BigDecimal.html
• google_currency
  • https://github.com/RubyMoney/google_currency/blob/master/lib/money/bank/google_currency.rb