On Sun, Jun 14, 2009 at 4:51 PM, Miguel Mitrofanov
ghci> map reverse $ foldM (\answer list -> [x:answer | x <- list, not $ x `elem` answer]) [] [[2,3], [1,2], [2,3,4], [1,2,3]] [[2,1,4,3],[3,1,4,2],[3,2,4,1]]
On 14 Jun 2009, at 12:06, Fernan Bolando wrote:
Hi all
If I have a number of list example list1 = [2,3] list2 = [1,2] list3 = [2,3,4] list4 = [1,2,3]
I want to create a list from the list above with n elements, non-repeating and each elements index represents 1 of the elements from the corresponding list so for the above input I would get.
a = [3,2,4,1]
ofcourse there may be several set that will satisfy the problem, so a list of list that satisfies would be good.
How do I do this in haskell? or is there a code snippet that seems to work similarly?
thanks fernan
-- http://www.fernski.com _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
thanks miguel this is the one that I needed. thanks also to everyone fernan -- http://www.fernski.com