Re: [Haskell-cafe] infinite list of random elements

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