Rby::Money

Welcome to Rby:Money! A sample gem to ease the conversion of multiple currencies, and exposing basic arithmetic operations on them.

Installation

Add this line to your application's Gemfile:

gem 'rby-money'

And then execute:

$ bundle

Or install it yourself as:

$ gem install rby-money

Usage

Configure the currency rates with respect to a base currency (here EUR):

Rby::Money.conversion_rates('EUR', { 'USD' => 1.11, 'Bitcoin' => 0.0047 })

Instantiate money objects:

fifty_eur = Rby::Money.new(50, 'EUR')

Get amount and currency:

fifty_eur.amount # => 50

fifty_eur.currency # => "EUR"

fifty_eur.inspect # => "50.00 EUR"

Convert to a different currency (should return a Rby::Money

instance, not a String):

fifty_eur.convert_to('USD') # => 55.50 USD

Perform operations in different currencies:

twenty_dollars = Rby::Money.new(20, 'USD')

Arithmetics:

fifty_eur + twenty_dollars # => 68.02 EUR

fifty_eur - twenty_dollars # => 31.98 EUR

fifty_eur / 2 # => 25 EUR

twenty_dollars * 3 # => 60 USD

Comparisons (also in different currencies):

twenty_dollars == Rby::Money.new(20, 'USD') # => true

twenty_dollars == Rby::Money.new(30, 'USD') # => false

fifty_eur_in_usd = fifty_eur.convert_to('USD')

fifty_eur_in_usd == fifty_eur # => true

twenty_dollars > Rby::Money.new(5, 'USD') # => true

twenty_dollars < fifty_eur # => true

Development

After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/AlexanderRD/rby-money.

License

The gem is available as open source under the terms of the MIT License.