Sorting text frames by height

Question

Having some trouble sorting text frames by height with the javascript sort function... is this possible?

var doc = app.activeDocument;
function tallestFrame(page) {
          var frames = page.textFrames.everyItem().getElements();
          frames.sort(function(a,b) {
                    var aHeight = (frames.geometricBounds[2] - frames.geometricBounds[0]);
                    var bHeight = (frames.geometricBounds[2] - frames.geometricBounds[0]);
                    return aHeight - bHeight;
          });
}
alert(tallestFrame(doc.pages[0]));

John Hawkinson · Accepted Answer

In addition to Jongware's observation, this is wrong:

var frames = page.textFrames.everyItem().getElements();
frames.sort(function(a,b) {
          var aHeight = (frames.geometricBounds[2] - frames.geometricBounds[0]);

a and b are going to be individual objects in the frames, not their indices, so you should use

var aHeight = a.geometricBounds[2]-a.geometricBounds[0];

and soforth.

Jongware · Answer

You don't return a value from your function.

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