On Mon, Jul 30, 2007 at 02:40:35PM -0700, Chad Scherrer wrote:
> Given a list, say [1,2,3], I'd like to be able to generate an infinite
> list of random elements from that list, in this case maybe
> [1,2,1,3,2,1,3,2,3,1,2,...]. I'm using IO for random purely due to
> laziness (my own, not Haskell's).
You can be even lazier and let the Random library do more of the work
for you, seeing that it includes randomRs:
randomElts rg xs = map (arr !) (randomRs bds rg)
where bds = (1, length xs)
arr = listArray bds xs
Lauri
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