From: Aaron Smith <beingthexemplary@...>
Date: 2007-03-09T06:44:35+09:00
Subject: generate UUID

Anyone have a fast way of generating a verson 4 UUID?

I have found some libraries to do this, but it seems like it could be
done in about 8 lines of code. Any faster approches?

what about this?

def rand_hex(l)
    validChars = ("A".."F").to_a + ("0".."9").to_a
    length = validChars.size
    hexCode = ""
    1.upto(l) do |i|
      hexCode << validChars[rand(length-1)]
    end
    hexCode
end

r =
"#{rand_hex(8)}-#{rand_hex(4)}-#{rand_hex(4)}-#{rand_hex(4)}-#{rand_hex(12)}"
puts r


thanks

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