CFUNITED Demo Derby Code

Yesterday at CFUNITED I presented some more (useless) code concerning mazes and ColdFusion. I’ve blogged on this a few times already, but I decided to play around with it a bit more. For the derby, I demonstrated code that generated mazes in a slightly different way than I’ve had before. I’ve shown outputting mazes with text. I’ve shown outputting mazes with graphics. But this version puts one more little spin on it - old school style:

What you are seeing here is a text based description of a maze stored in the session scope. This is done by first figuring out what directions are allowed based on your current position in the maze:

public function getExits(numeric x, numeric y) { var exits = ""; //handle west possible if(variables.mazedata.maze[arguments.y][arguments.x-1] == 0) exits = listAppend(exits, "west"); //handle east possible if(variables.mazedata.maze[arguments.y][arguments.x+1] == 0) exits = listAppend(exits, "east"); //handle north possible if(variables.mazedata.maze[arguments.y-1][arguments.x] == 0) exits = listAppend(exits, "north"); //handle south possible if(variables.mazedata.maze[arguments.y+1][arguments.x] == 0) exits = listAppend(exits, "south"); return exits; }

This then is used by a simple function to describe the current room. All rooms in the maze have the exact same look - it is only the exits that change:

function describePosition(numeric x, numeric y) { //better not be a wall or you are dead var exits = getExits(arguments.x,arguments.y); var s = "You are in a dark and dusty maze.<br/><br/>"; var i = "";

//Ok, I'm using pos with 0,0 in upper left				
if(listLen(exits) is 1) {
	s &= "There is one exit to the #exits#.";
} else {
	s &= "There are exits to the ";
	for(i=1; i &lt;= listLen(exits); i++) {
		s &= listGetAt(exits, i);
		if(i &lt; listLen(exits)-1) s&= ", ";
		else if (i == listLen(exits)-1) s&= " and ";
		//else if (listLen(exists) is 2 and i is 1) s
	}
}		
		
return s; }	 </code>

Movement is done by simply checking your current position against valid exits. Also note that I allow for shorthand versions of movements (e for east, etc):

public function move(string dir, numeric x, numeric y) { var pos = {x=arguments.x,y=arguments.y}; if(dir == "e") dir="east"; if(dir == "w") dir="west"; if(dir == "s") dir="south"; if(dir == "n") dir="north";

if(listFindNoCase(getExits(x,y), dir)) {
	if(dir == "east") pos.x++;
	if(dir == "south") pos.y++;
	if(dir == "west") pos.x--;
	if(dir == "north") pos.y--;
}
return pos; } </code>

Totally useless - and totally fun - and yes - I have inklings for other maze demos to try as well. I’ve attached the code (including the Grue version) but note that it is ColdFusion 9 only.<p>Download attached file.</p>

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About Raymond Camden

Raymond is a developer advocate. He focuses on JavaScript, serverless and enterprise cat demos. If you like this article, please consider visiting my Amazon Wishlist or donating via PayPal to show your support. You can even buy me a coffee!

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