[dirGames-L] Multidimensional Arrays using Lingo

[Thomas Kaiser]

Hi Ryan!

Rac> int g_bBoard [ 3 ] [ 3 ] ;

What you'd need to do here is to create an empty list and populate it
with lists or default values before setting and retrieving values...
Somethig like this should work:

on createBoard (xDim, yDim, defaultVal)

   tmpBoard = []
   tmpY = []
   
   repeat with i = 1 to yDim
     tmpY[i] = defaultVal
   end repeat

   repeat with i = 1 to xDim
     tmpBoard[i] = duplicate(tmpY)
   end repeat

   return tmpBoard

end

g_bBoard = createBoard(3,3,0)

Rac> g_bBoard [ 0 ] [ 0 ] = 1 ;
Rac> g_bBoard [ 0 ] [ 2 ] = 2 ;
Rac> g_bBoard [ 2 ]  [ 0 ] = 1;
Rac> g_bBoard [ 2 ] [ 2 ] = 2 ;

Then this should work perfectly! (Just in case you don't know already:
Mind the use of the duplicate() function - Lingo will pass all parameters
as value EXCEPT lists wich will be passed as reference by default. Omitting
the duplicate will therefore result in g_bBoard populated by three identical
instances of the same list.)

There may be more elegant ways of poing the initialising, but this should get
you started ...

Cheers,
tom