alt Hacker News16 random bytes is not a valid UUIDv4. I don’t think it needs to be in the standard library, but implementing the spec yourself is also not the right choice for 99% of cases.
Replies
rollulus • today at 7:40 AM
Well that depends on your luck, it could be a valid one about 1/16th of the time.
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groestl • today at 9:12 AM
Let's call it a valid UUIDv0 - all bits randomized including the version bits :)
I didn't say about 16 random bytes. But you're almost there. You generate 16 random bytes and perform few bitwise operations to set version and variant bits correctly.
Not that it matters. I don't even think that there's a single piece of software in the world which would actually care about these bits rather than treating the whole byte array as opaque thing.