[Haskell-beginners] A good data structure for representing a tic-tac-toe board?
peter.hall at memorphic.com
Mon Mar 18 20:49:25 CET 2013
Start with a data type for the cell values, instead of Char. Then use an
Array of Arrays, containing those values.
data Cell = Empty | O | X
type Board = Array Int Cell
Finding winning "rows" and "columns" is easy. Diagonals are slightly more
On 18 March 2013 15:54, Costello, Roger L. <costello at mitre.org> wrote:
> Hi Folks,
> Currently I am representing a tic-tac-toe board as a string, with 'X'
> denoting player 1 and 'O' denoting player 2. For example, I represent this
> 2x2 game board:
> 'X' |
> | 'O'
> with this string: "X O"
> The nice thing about that representation is that it is each to identify
> which cells are filled or empty, and it is easy to mark a cell with an 'X'
> or 'O'.
> The problem with the representation is that it is difficult to determine
> when a player has won.
> Can you recommend a representation that makes it easy to:
> 1. determine when a player has won
> 2. identify cells that are filled or empty
> 3. mark an empty cell
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