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?
Well you could simply concatenate all the lists using the (++) operator and then use Data.List.nub: http://haskell.org/ghc/docs/latest/html/libraries/base/Data-List.html#v:nub to remove duplicates. Erik -- ---------------------------------------------------------------------- Erik de Castro Lopo http://www.mega-nerd.com/