ENTER_FRAME return values

[JoeLongstreet]

I'm trying to return a value from a function but I keep getting this error: "Incorrect Number of Arguments. Expected 1." I think there should be a pretty easy solution to this one but I just don't know what it's asking for here. I assumed it wanted the name of the variable I was trying to return but that wasn't right. Here's the code. Also, is it possible to return more than one value from a single function?

Thanks,

Joe

[kglad]

you can't get a return from a listener function. put your trace inside getGreenInfo or dispatch greenNumber where it's needed.

[kglad]

and yes, you can return multiple variables/values from a function using an object or array, for example, as the return type.

[JoeLongstreet]

Alright, I've changed my code from this:

function getGreenInfo(event:Event):Number {
var greenNumber:Number;
greenNumber = greenBar.currentFrame;
return greenNumber;
}
stage.addEventListener(Event.ENTER_FRAME, getGreenInfo);
trace(getGreenInfo());

to this:

function getGreenInfo(event:Event):Number {
var greenNumber:Number;
return greenNumber;
trace(getGreenInfo());
}
stage.addEventListener(Event.ENTER_FRAME, getGreenInfo);

but my trace statement within my function returns nothing

[Craig Grummitt · Accepted solution]

joe,

afraid your code's getting worse!

there's three main issues -
1. as kglad said, "you can't get a return from a listener function". this means that your getGreenInfo function should return void, NOT Number.
2. this also means that your event handler(aka listener function) should not have the following line:
return greenNumber;
3. but wait! the return is actually stopping your trace line from being called. but your trace line at the moment:
trace(getGreenInfo());
is self-referential, meaning that it is calling the function it is in, and your computer will hang for a little while until flash works out there's a never-ending loop.

so anyway, what are you trying to do? if you want to trace the currentFrame of greenbar every frame, then this will suffice:

[JoeLongstreet]

Craig,

Thank you so much for your help. I'm new at this actionScript thing so whenever I can get somebody to take a second and actually explain what is going wrong, it really helps me out a lot. I was just making it a little more difficult than it had to be.

I have 5 movie clips on stage and if two of them are at frame 10, I want the movie to go somewhere else and play. So my code will look something like this:

function getGreenInfo(event:Event):void {
if (greenBar.currentFrame == 10 && yellowBar.currentFrame == 10 && whiteBar.currentFrame == 0) {
trace("Underpants");
}
}
stage.addEventListener(Event.ENTER_FRAME, getGreenInfo);

This doesn't really work, I'm guessing you can't have multiple &&'s within one statement?

Thanks again Chris for your explanation.

Joe

[Craig Grummitt]

chris? who's chris? ;)

yes you definitely can have multiple &&'s within one statement.

currentFrame will never equal 0, the first frame is 1.

[JoeLongstreet]

How embarrassing. I had your name right in front of me and I couldn't get it straight. At least I got your name right on the first part of the post. Thanks again for the help, Craig.