Clojure implementation of ISO 7064 - Check check character systems. Providing all Pure and Hybrid systems listed in the standard under 5.4.1. Moreover custom check character systems can be created.

To install, just add the following to your project dependencies:

[org.clojars.knoppiks/iso-7064 "0.1.0"]

(use 'iso-7064.core)

(calc-check-character mod-11-2 "079")
(valid? mod-11-2 "079X")

(use 'iso-7064.core)

(def sys (pure-system "0123456789ABC" 13 2 false))
(calc-check-character sys "05BC")
(valid? sys "05BCA")

Note: Custom systems may be useless, if arguments are chosen unwisely. For more information refer to the standard or other sources on check character systems.

Copyright © 2016 Jonas Wagner

Distributed under the Eclipse Public License, the same as Clojure.