Re: [flasher] Re: checking for undefined.

[Muzak]

Actually the answer was in your subject :-)

You can use 'undefined' or 'null' to see if a variable excists.


if (myVar == undefined) {

    trace ("myVar is undefined");

} else {

    trace ("myVar= "+myVar);

}

----------------------------

if (myVar == null) {

    trace ("myVar is undefined");

} else {

    trace ("myVar= "+myVar);

}

----------------------------

'Undefined' is not listed in the documentation, but it works.


hth,

Muzak


>

DRMRLPLSaol [dot] com wrote:

> > 

> > How do we check for undefined values in Flash 5.

> > 

> > My movie needs to check for values that may be passed from an outside script.

> >  So I am checking to see if the value is defined or not and nothing is

> > working.

> > 

> > I've tried :

> > if (value1 ==  "")

> > if (isNaN(value1))

> > if(number(value1))

> > 

> > What do I need to check for?  I was told that undefined values in Flash 5 are

> > 0, but this doesn't seem to be true.

> > 

> > Andrew