Using variable outside of a function. Error - Incorrect number of arguments. Expected 1

Question

I have the following code so I can use the var "qst" in another function. But when I run it I get an error

"1136: Incorrect number of arguments. Expected 1" for this line button();

Do I have to put an argument in button(); for this to work? Many thanks

var myDateDay:Date = new Date();
var dayNumber:int = myDateDay.day;
var qst:XML;
var qstLoader:URLLoader = new URLLoader();
qstLoader.load(new URLRequest("default.qst"));
qstLoader.addEventListener(Event.COMPLETE, processQST);

// Process QST file;
function processQST(e:Event):void {
qst = new XML(e.target.data);
trace(qst);
button();
}

myButton.addEventListener(MouseEvent.CLICK, button);
function button(event:MouseEvent):void {
var question:XMLList = qst.question.(@day == dayNumber).text;
trace(question);
}

Vesper · Accepted Answer · 2012-09-06 05:20:07Z

1

Since you want your "button" to be both called from outside and to react on events, you need to assign it a parameter of type Event. So, either call it like button(null); or make an adjust to your declaration, like this:

function button(event:MouseEvent=null):void {...}

and call it like a function with zero parameters.

answered Sep 6, 2012 at 5:20

Vesper

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3 Comments

Stephen Over a year ago

Thank you @Vesper. I will try that. I would like the var "qst" to be available for use outside the processQST function and this is what I have found that may do that.

Stephen Over a year ago

It seems that when I use button(null); it doesn't wait for the button to be clicked, but runs right through the second function.

Vesper Over a year ago

In this case your process is two-phased, first you load the qst, second you press the button. You can play with its "enabled" property, internal flag, availability of qst's data or adding listener only in processQST function. Either might work in your case, but you need to clarify it. Also, if you actually receive correct data in button() function, then your QST is available, otherwise this needs more clarification as well.

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