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Mint::Money

Mint::Money perform currency conversion and arithmetics with different currencies.

Installation

Add this line to your application's Gemfile:

gem 'mint-money'

And then execute:

$ bundle

Or install it yourself as:

$ gem install mint-money

Usage

# Configure the currency rates with respect to a base currency (here EUR):
 
Money.conversion_rates('EUR', {
  'USD'     => 1.11,
  'Bitcoin' => 0.0047
})

 

# Instantiate money objects:
 
fifty_eur = 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 Money
# instance, not a String):
 
fifty_eur.convert_to('USD') # => 55.50 USD

 

# Perform operations in different currencies:
 
twenty_dollars = 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 == Money.new(20, 'USD') # => true
twenty_dollars == Money.new(30, 'USD') # => false
 
fifty_eur_in_usd = fifty_eur.convert_to('USD')
fifty_eur_in_usd == fifty_eur          # => true
 
twenty_dollars > 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/mpakus/mint-money.

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