Use Arrays to represent Grid data instead of Objects

js/Grid.js

@@ -47,11 +47,11 @@ function clear() {
 }
 
 function generate(f) {
-	var result = {}
+	var result = [];
 	for(var row = 0; row < grid.size; row++) {
-		result[row] = {};
+		result[row] = [];;
 		for(var column = 0; column < grid.size; column++) {
-			result[row][column] = f(row, column);
+			result[row].push(f(row, column));
 		}
 	}
 	return result;