You’re defining textLineObjectArray as an object. Try defining it as an array:

 

var textLineObjectArray = [];

 

 

Dan

 

From: Phil Bearman

Sent: Wednesday, April 23, 2014 12:49 PM

To: After Effects Mail List

Subject: Re: [AE] Extendscript Question - Array length problem

 

Hi David, thanks for the reply.  Yes, it's populating the array as expected.  Here's a better example script.  This is a simplified version of the actual script I'm using, but demonstrates the problem if you run it in ExtendScript Toolkit (it should pop up an alert box giving the length of the array but instead says ''undefined').

 

//~ Declare array (which will be populated with objects)

var textLineObjectArray = {};

 

var textLine="Sample";

//~ Split string into array of characters

var textLineArray = textLine.split('');

//~ Iterate through array and for each character, create an object

for (var i = 0; i < textLineArray.length; i++){

     //~ Add  character name to object

        textLineObjectArray[i]={name:textLineArray[i]}

}

//~ output length of array of objects

alert(textLine1ObjectArray.length);

 

Can you see any problems with this?

 

Phil

 

--

Phil Bearman

Phil Bearman Creative Media Solutions
Motion Graphics Design

NEW!  Video DJ Toolkit Volume 2 - Occasions: http://philbearman.co.uk/shop/vdj-toolkit-2/

www.PhilBearman.co.uk : Nightclub & Bar ~ Production, Corporate & Events ~ DVD Products

0161 236 2581 - 9am-5pm, Monday-Friday

This message contains confidential information and is intended only for the individual named. If you are not the named addressee you should not disseminate, distribute or copy this E-Mail. Please notify the sender immediately by E-Mail if you have received this E-Mail by mistake and delete the E-Mail from your system. E-Mail transmission cannot be guaranteed to be secure or error-free as information could be intercepted, corrupted, lost, destroyed, arrive late or incomplete, or contain viruses. The sender therefore does not accept liability for any errors or omissions in the contents of this message or attached documents or for any damage suffered by your computer system caused by any errors or viruses contained in the E-Mail message or any attached documents.

On 23 April 2014 18:39, David Torno <torno@sydefxink.com> wrote:

You should still be able to get the length of the array using length. Object or item based. I would verify that the array keys (.width and .height) are actually populated correctly within the array. I usually make my object arrays a little different and more literal like this. Not that it's right or wrong, just different option.

 

for(var i=0; i<aryLen; i++){

     myObjectAry.push({'width': ary.width, 'height': ary.height});

}

David Torno

Technical Director

http://www.ghosttownmedia.com

O: 213.739.2290

C: 818.391.6060

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

http://aeioweyou.blogspot.com

"The most useless day is that in which we do not laugh"

-Charles Field

On Apr 23, 2014, at 9:29 AM, Phil Bearman <phil@philbearman.co.uk> wrote:

Hi all, 

 

I'm doing some scripting in AE, and need to iterate through an Array of Objects, so need to find out the number of items in the array in order to set up the loop.

 

I had expected to be able to get the number of items using myArray.length, but this gives an 'undefined' error in ExtendScript.

 

The array has been populated with a loop in the following manner:

 

for (var i=0; i < myWidthValues.length; i++)

{

myArray[i].width=myWidthValues[i];

myArray[i].height=myHeightValues[i];

}

 

(this isn't the real code, just a simplified example)

 

And the array is functioning as expected (so for example myArray[2].width gives the result I expect).

 

Is there a reason that an Array of Objects won't return a 'length' value?

 

(I know this question would be better suited to a general javascript forum, but I've trawled internet forums to no avail, and thought I'd ask here first in case it's a quirk specific to ExtendScript).

 

Any help much appreciated!

 

Phil

 

--

Phil Bearman

Phil Bearman Creative Media Solutions
Motion Graphics Design

www.PhilBearman.co.uk : Nightclub & Bar ~ Production, Corporate & Events ~ DVD Products 

0161 236 2581 - 9am-5pm, Monday-Friday