Validatr
An implementation of several error checking algorithms, including Luhn and Damm, for string and number error checking.
This gem currently only supports validation of integers and strings of integers.
Installation
Add this line to your application's Gemfile:
gem "validatr"And then execute:
$ bundle
Or install it yourself as:
$ gem install validatr
Usage
require "validatr"
Validatr::Luhn.check_digit 12345678 # => 2
Validatr::Verhoeff.check_digit 12345678 # => 4
Validatr::Damm.check_digit 12345678 # => 6
Validatr::Luhn.valid? 123456782 # => true
Validatr::Verhoeff.valid? 123456784 # => true
Validatr::Damm.valid? 123456786 # => true
123456782.valid_luhn? # => true
123456782.valid_verhoeff? # => false
123456782.valid_damm? # => false
(123456784.0).valid_luhn? # => false
(123456784.0).valid_verhoeff? # => true
(123456784.0).valid_damm? # => false
"123456786".valid_luhn? # => false
"123456786".valid_verhoeff? # => false
"123456786".valid_damm? # => trueContributing
Bug reports and pull requests are welcome on GitHub at https://github.com/julienroger/validatr.
License
Copyright (c) 2017 Julien Roger