loop through layers setting lock and visibility

[jncampos555]

  I need to loop through the layers in the active document and set some of the layer properties to either false or true.  I was trying to a create a loop using a "for" method, but it didn't seem to work. I gave up on the "for" method because I kept running into a problem.  I don't need to set all layers with these settings just the odd ones (2,4,6, etc). Here is sample if it was written out. 

var myLayer = myDoc.layers[2];

myLayer.visible = false;

myLayer.locked = true;

var myLayer = myDoc.layers[4];

myLayer.visible = false;

myLayer.locked = true;

var myLayer = myDoc.layers[6];

myLayer.visible = false;

myLayer.locked = true;

var myLayer = myDoc.layers[8];

myLayer.visible = false;

myLayer.locked = true;

I have 208 layers, so doing it this way would be way to long. Any help would be appreciated.

Running Illustrator CC 2014.

[CarlosCanto]

why didn't the for loop work? what was the problem you kept running into?

to target every other layer try

for (var a=0; a<myDoc.layers.length; a+=2) // 0, 2, 4, 6

to start with the third layer [2]

for (var a=2; a<myDoc.layers.length; a+=2) // 2, 4, 6, 8

[ThinkingThings · Accepted solution]

After I wrote this and tested it, I saw that Carlos already answered it, but I thought that I would post it anyway. Carlos KNOWS how much I love JS... 😉

One difference is that since it wasn't clear to me which layer you were referring to as layer #1, I started from the bottom of the heap.  Hope this helps.  -TT

var aDoc = app.activeDocument;
var lc = aDoc.layers.length;
for (var i = 2; i <= lc; i+=2) {
    var curLayer = lc - i
    aDoc.layers[curLayer].visible = false;
    aDoc.layers[curLayer].locked = true;
}

[jncampos555]

@ Thinking and Carlos

First of all thanks for responding so quickly.  After looking at your code I think I know why it didn't work. I type this " i + 2"  instead of what both of you have " I+=2". SMH.  Tested it out and they both work.  Thanks!!

[CarlosCanto]

you're welcome jn,

I know you do ThinkingThings