How to merge every layerset as a layer in the document?

[Curvin]

I want to merge all layerset in the document

var layerSets = app.activeDocument.layerSets;

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

{

    layerSets.merge();

}

But some of the layerset merged  and some of them didn't.  What's the problem and is there any other way to do it?

[sidpalas · Accepted solution]

The problem is that layerSets.length is changing on each iteration of the for loop (because a layerSet dissapears with each call of merge()!

For example, if you have 3 layerSets to begin:

1st iteration: i = 0, layerSets.length = 3, layerset_0 is merged

2nd iteration: i = 1, layerSets.length = 2, layerset_1 is merged

3rd iteration: i = 2, layerSets.length = 1, i > layerSets.length, loop terminated

One solution is to iterate in reverse starting with the final element. This way, as layerSets.length shrinks, it is okay, because you have already handled the associated layerSets.

See below for example:

var layerSets = app.activeDocument.layerSets;
for(var i = layerSets.length - 1; i >= 0; i--)
{
    layerSets.merge();
}

[Curvin]

Right, you are so clever!