ruby-uuid
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shyouhei
Pure-ruby UUID generator/parser in <300 lines. It fully supports UUID versions 1, 3, 4 and 5.
For GitHub users;
This is a pure-ruby implementation of RFC4122 that I wrote back in 2005. I have touched its internals a few times (mainly bugfixes). I know someone has already uploaded an old copy of it to GitHub, and thats' 100% legal he has the right to do so, but I believe what I have now is better than the older ones. So I upload this.
It's very tiny (<300 lines ruby code) and you can simply copy lib/uuid.rb to your project. The gemspec file can help you maintain your dependency though.
shyouhei