Luhn check

With the luhn-check you can check a number with the Luhn algorithm.

Installation

Version

0.0.1

Add this line to your application's Gemfile:

gem 'luhn-check'

And then execute:

$ bundle

Or install it yourself as:

$ gem install luhn-check

Usage

After the gem is installed. There are some helpers available.

To check if the number is valid with the Luhn algorithm:

  Luhn.valid?(number)
  Luhn.calculate_check_digit(number)
  Luhn.double_digits(number) # Array with digits for checksum

Contributing

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