Re: [Haskell-cafe] How to generate random string?

does this compile at all? i don't think i understand the first line. anyway, a few hints: - if you want to have all numbers between 0..n in your output for some n, just in random order, google for "permutation". - perhaps you can generate the output in an ordered fashion first, eg. into an array, and then shuffle the list by plucking elements from it at random into a new list. - do not use unsafePerformIO. it may reduce the entropy (randomness) of the results, but even if it doesn't, the code is prettier without. good luck! if you get stuck again, just post more code. matthias On Fri, Sep 18, 2009 at 10:14:53AM -0700, Snouser wrote:

To: haskell-cafe@haskell.org From: Snouser Date: Fri, 18 Sep 2009 10:14:53 -0700 (PDT) Subject: Re: [Haskell-cafe] How to generate random string?

Snouser wrote:

...

I need to generate a random string from 1 to 30.

This is the parts I've done so far.

unikString xs | let x = unsafePerformIO (randomRIO (1,30)) elem x xs = x : unikString xs | otherwise = unikString xs

How do I proceed?

I need the string/list to look like this:

[1,9,3,6,2] et.c with only unik numbers.

Thanks!

I wasnt added to the mailinglist, but now I'm.

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