[Haskell-cafe] StdGen Reliability Across Versions / Systems

[Thomas DuBuisson]

If you want random numbers that are consistent across package version
changes then you could simply leverage a package that aims to
implement a standard.  Short of bug fixes, code implementing a
standard should not behave differently across versions.  For example,
use a cryptographic algorithm (AES CTR or ChaCha20) or a standardized
cryptographic RNG like Hash SP 800-90 as your RNG.

-Thomas

On Fri, Aug 26, 2016 at 10:13 PM, Christopher Howard <ch.howard at zoho.com> wrote:
> I know that, ff you feed mkStdGen a particular seed, and pull a list of
> random numbers from that StdGen, that that the list will always be the
> same if your run your compiled program over and over again on that same
> system. But which of the following will cause you to get different output?:
>
> 1) Changes in GHC version
> 2) Changes in "random" library version
> 3) Compiling / Running on a different host computer (but compiling with
> the same GHC & random versions.
>
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