Talk:Haskell/Hierarchical libraries/Randoms

From Wikibooks, the open-content textbooks collection

Jump to: navigation, search

I understand that random numbers are a slightly more advanced topic in Haskell. However, I think most people who have programmed before and who are interested in trying Haskell will want/need random numbers. The information in this page is fine, but I thought it was a bit too technical for somebody who just wanted to get random numbers working. He/she may decide to read the theory later.

I suggest having an introductory section which is just copy & paste (like the rest of the wikibook). I had to google around for a while until I could finally be able to read the page.

A few examples with rolling a die or tossing a coin should suffice.

That sounds good. How about giving it a shot? It's ok, nay, better if you don't feel yourself to be completely at ease yet, because you know what interests new Haskellers most. Somebody can always come in to clean up. -- Kowey 08:26, 18 March 2007 (UTC)

[edit] Examples don't work.

Hi, i'm pretty new to haskell, but i understood the text, and i copied the exact examples in a file to test them. They don't work. I can't get a working RNG, no matter what i do. The examples always give type errors.

Simply try to put the stuff in a .hs-file yourself, and run/open it with hugs. Then - if you get this far - try using them together to simply recreate a normal generation and outputting (putStr (show r)) of one random number ... No RNG for me. :((

If yu can, try to change the page in a way that lets others quickly try the examples. :)

Thanks for that. If you're on IRC, could you maybe paste what you had on http://hpaste.org and see if the #haskell'ers can help? I'm too busy to work on this, sadly -- Kowey 06:55, 16 April 2007 (UTC)

[edit] All I want is a simple example

Hi, I'm new as well, and I just don't understand what's currently here. I just want to get something that I can type into the hugs interpreter and see random numbers (of any range) come out. I'm not interested in function definitions, I just need a working example. When I finally get one, maybe I'll update this page, but I don't have the knowledge to do so right now. Any guru's out there who could supply one?

Hey there. I copied this from the Haskell cookbook:
main = do
  gen <- getStdGen
  ns <- randoms gen
  print $ take 10 ns
If you have a moment, maybe you could work it into the text? -- Kowey 05:46, 25 April 2007 (UTC)
Retrieved from "http://en.wikibooks.org/wiki/Talk:Haskell/Hierarchical_libraries/Randoms"