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How do I use Data.Random.Source.IO to generate random numbers in Windows AND Unix? #9

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mcandre opened this issue Sep 13, 2012 · 1 comment

mcandre commented Sep 13, 2012

I want my code to be platform-agnostic, but I can't find example code using Data.Random.Source.IO anywhere in the documentation.

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mokus0 commented Sep 27, 2012

Data.Random.Source.IO declares a "MonadRandom" instance for IO, which means that random variables can be sampled using the "sample" function.

For example:

sample (uniform 0 10) :: IO Int

Should "just work". If you need to reference it as a concrete "source", you can use the special value StdRandom, as in:

sampleFrom StdRandom (uniform 0 10) :: IO Int

StdRandom is a pseudo-source that refers to the default source of randomness for the monad in which it is used.

Sorry to take so long to reply. I've been mostly offline for a few months.

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