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Perl: the Markov chain saw

Re^7: Generate a unique ID

by Anonymous Monk
on Nov 17, 2010 at 15:38 UTC ( #872007=note: print w/ replies, xml ) Need Help??

in reply to Re^6: Generate a unique ID
in thread Generate a unique ID

a 1 in 30 chance
That's just because your PRNG is only 15 bits:

$ perl -e 'printf "%.3f%", 2**15/1e4' 3.277%
With a decent PRNG, you'd have a much lower chance of collisions.

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Re^8: Generate a unique ID
by BrowserUk (Pope) on Nov 17, 2010 at 15:42 UTC

    I know :) I did mention that in the post above.

    I also mentioned earlier in the thread, that its use inside a function called truly_random() inside Data::UUID (amongst other things) makes that module suspect.

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