[Haskell-cafe] How can I represent 4x4 map in haskell

Tillmann Rendel rendel at rbg.informatik.tu-darmstadt.de
Mon Mar 31 11:22:33 EDT 2008

iliali16 wrote: 
> type Line = [Char]
> type Board = [Line]
> so my question is if this is ok to represent a map. If yes I will try to
> write the function which makes it 4 x 4 myself. What I jsut need as an
> answer is Yes or No. Just to let you know is that I am trying to build the
> Wumpus World

A list of lists of cells is a possible representation for a two-dimensional
array, yes. for bigger maps, there may be a performance problem,
but for such a small world, it should be fine. 

You may consider using an array, e.g. with

  import Data.Array
  type Board = Array (Int, Int) Char 

Boards will be indexed by coordinate tuples.

Another point: maybe you should use an algebraic data type instead of
Char to represent the individual cells? e.g.

  data Cell = Wumpus | Trap | Gold | Nothing
  type Board = [[Cell]]

Be aware of the Wumpus! 


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