Luhnar

Implementation of Luhn algorithm for computing checkdigits.

Installation

Add this line to your application's Gemfile:

gem 'luhnar'

And then execute:

$ bundle

Or install it yourself as:

$ gem install luhnar

Usage

require 'luhnar'

Luhnar.compute('8900123456789012345')

# or

Luhnar.compute(8900123456789012345)

# returns 6

Contributing

1. Fork it
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Added some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create new Pull Request