A small class for generating and validating Universal Product Codes (UPCs), the 12 digit codes found on many older US products.
Installation¶ ↑
gem install upc
Usage¶ ↑
UPC.new("632737715836").valid?
=> true
UPC.valid?("632737715836")
=> true
UPC.valid?("632737715837")
=> false
UPC.complete("63273771583")
=> "632737715836"
UPC.new("632737715836").to_ean
=> "0632737715836"
Further Reader¶ ↑
Contributing¶ ↑
Source code is publicly available @ github.com/yob/upc/tree/master. Patches welcome, preferably via a git repo I can pull from.