Luhn check

With the luhn-check gem you can validate a number with the Luhn algorithm. This is commonly used to check validity of creditcard numbers and others.

In your Gemfile:

gem 'luhn-check', '~> 0.0.5', require: 'luhn'

Or:

$ gem install luhn-check

Validate a number:

Luhn.valid?(number)              #=> true or false
Luhn.valid?(4539085529167499)    #=> true

LuhnError::RequirementError

The number you want to validate must be a least:

• From the Fixnum class
• Positive
• Not 0 (zero)

1. Fork
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