Comments on Web Development Central: ActionScript 3 NaN: Not a No-brainer

In case anyone else comes here looking for the sam...

2011-04-27T12:56:33.989-04:00

In case anyone else comes here looking for the same knowledge I did...I've found you can use this to compare numbers easily:

var num1:Number = NaN;
var num2:Number = NaN;

if(ObjectUtil.compare(num1, num2) == 0)
{
trace("Worked!");
}

One of the simplest ways to check if the number is...

2011-02-09T21:35:47.125-05:00

One of the simplest ways to check if the number is NaN is checking it against itslf:

function isNan(number : Number) : Boolean {
return !(number == number);
}

function isNumerical(number : Number) : Boolean {
return (number == number);
}

The trick is to take advantage of the comparison Nan == NaN that always return false

Another NaN non brainer...never use a uint paramat...

2010-09-09T06:26:23.802-04:00

Another NaN non brainer...never use a uint paramater with a defualt of NaN (as shown below)...because the paramater,x, in this case will ealuate to '0' and your if(isNaN(x)) will always fail since zero is a number...

AVOID this
function someFunc(x:uint=NaN){
if(isNan(x))
...
}

instead make x a "Number"...as below
function

Another NaN non brainer...never use a uint paramat...

2010-09-09T06:26:05.730-04:00

Just what I was looking for. Thanks

2010-02-18T09:47:33.219-05:00

Just what I was looking for. Thanks

Hi, I was just looking for a predicate that could ...

2009-04-07T08:47:00.000-04:00

Hi, I was just looking for a predicate that could check if (and if only) a value was NaN, and I found a solution while reading this post : isNaN(myValue as Number).

Unless I'm mistaken, this evaluates to true only with NaN, (and false with null, undefined or an object).

Have a nice day...

yeah NaN == Nan returning false makes perfect sens...

2008-12-16T16:26:00.000-05:00

yeah NaN == Nan returning false makes perfect sense, which is why I was so surprised when false == false didn't return false. Coming from the .NET world, I have been continually disappointed by ActionScript.

I'm usually the last one to defend Adobe or Action...

2008-07-16T11:48:00.000-04:00

I'm usually the last one to defend Adobe or ActionScript, I really think its a pretty broken language, but that being said -- NaN is pretty standard, and NaN != NaN is defined in the ISO floating point math standards.

What the fuck is NaN.. You can't do any bull shit ...

2008-03-13T04:38:00.000-04:00

What the fuck is NaN.. You can't do any bull shit with it!!! Fuck!!!! Can't Adobe think before adding functions??? Fuck off idiots!!

2008-03-13T04:36:00.000-04:00

This comment has been removed by the author.

in order to make this function available in flex y...

2008-02-19T12:21:00.000-05:00

in order to make this function available in flex you have to:

import flash.display.Sprite;

:)

Number.NaN != Number.NaN

you can't compare...

2007-10-30T13:34:00.000-04:00

Number.NaN != Number.NaN

you can't compare NaN against NaN it's an illogical comparison. NaN == NaN will always evaluate to false;

John Berzy

Just for the record, there is an isNaN function in...

2007-07-05T21:10:00.000-04:00

Just for the record, there is an isNaN function in Flex 2(AS3). Please see the following URL:

http://www.adobe.com/livedocs/flex/2/langref/package.html

Neither of these solutions worked for me in Flex 2...

2007-04-19T10:01:00.000-04:00

Neither of these solutions worked for me in Flex 2. There seems to be no function "isNaN" defined, and the other test didn't work either. So I wrote the following isNaN function - shown here with the isNumeric function that I was really after:

public function isNaN(number:Number):Boolean
{
return !(number <= 0 || number > 0);
}
public function isNumeric(string:String):

The isNaN() method didn't work for me. I found the...

2007-03-08T04:31:00.000-05:00

The isNaN() method didn't work for me. I found the code below a good work around for the Number NaN problem.

var MyNumber:Number;

MyNumber = getNumber();
if (MyNumber != new Number(undefined))
{
// do something
}

Thanks, Keith. I guess that in AS2 I had used null...

2006-11-08T09:31:00.000-05:00

Thanks, Keith. I guess that in AS2 I had used null as the return type, so had never encountered this issue. Instead of returning null or NaN from such a method, perhaps a better design would be to throw an exception upon the discovery of the inability to return a valid number.

For the record, NaN has the same behavior in AS2. ...

2006-11-08T06:55:00.000-05:00

For the record, NaN has the same behavior in AS2. You're right about not being able to return null where a function expects a number return type though. That's new.

Comments on Web Development Central: ActionScript 3 NaN: Not a No-brainer

In case anyone else comes here looking for the sam...

One of the simplest ways to check if the number is...

Another NaN non brainer...never use a uint paramat...

Another NaN non brainer...never use a uint paramat...

Just what I was looking for. Thanks

Hi, I was just looking for a predicate that could ...

yeah NaN == Nan returning false makes perfect sens...

I'm usually the last one to defend Adobe or Action...

What the fuck is NaN.. You can't do any bull shit ...

in order to make this function available in flex y...

Number.NaN != Number.NaN you can't compare...

Just for the record, there is an isNaN function in...

Neither of these solutions worked for me in Flex 2...

The isNaN() method didn't work for me. I found the...

Thanks, Keith. I guess that in AS2 I had used null...

For the record, NaN has the same behavior in AS2. ...

Number.NaN != Number.NaN

you can't compare...