NullReferenceException and classes

Questions & Answers
1

Okay, I thought I understood all this, but now suddenly I'm at a loss. This NullReferenceException error (Object Reference not set to an instance of an object) gives me little information about what I'm doing wrong.

Basically, I have a class called "trigger", set up as just a bunch of variables like so:

class trigger {
   var name:String = "Idle";
}

Then in another script, I attempt to make an array of these triggers, like so:

public var myCode:trigger[];
public function makeTrigger(howMany:Number){
   myCode = new trigger[howMany];
   Debug.Log("thisTrigger: "+myCode[0].name);
}

It's that Debug.Log line that pops the error. Obviously, anything more I try to do with my trigger class doesn't work. If I debug the length of myCode, I get the right number, but somehow the class is empty. I don't understand.

Any help would be just awesome. Thanks in advance, Jeremy

2

You've created an array of trigger references, but you still haven't created the triggers themselves. You need something like ...

public var myCode:trigger[];
public function makeTrigger(howMany:Number){
   myCode = new trigger[howMany];
   for (var i = 0; i < howMany; ++i){
      trigger *= new trigger();*
 *}*
 *Debug.Log("thisTrigger: "+myCode[0].name);*
*}*
*```*
*<p>(Apologies if my C# is showing, but you get the idea ...)</p>*