Luhn check

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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.

Installation

In your Gemfile:

gem 'luhn-check', '~> 0.0.3', require: 'luhn'

Or:

$ gem install luhn-check

Usage

Validate a number:

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

Troubleshooting

Requirements of number

LuhnError::RequirementError

The number you want to validate must be a least:

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

Contributing

  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