Copy item style attributes/properties to other item?

Question

Just want to ask if someone know if there is short way to copy item properties to other object, than go through every possibilities with script. There is quite many possibilities with strokes and so on, so this could be helpful...
I mean like with "Eyedropper Tool", but with the script
I can set them manually like below. But just want to know is there already some "shortcut" way to handle this kind object style copying?
var doc = app.activeDocument;
var selectedItems = doc.selection;
var newLayer = doc.layers.add();
var ellipse = newLayer.pathItems.ellipse(100, 0, 100.0, 100.0, false, true );
ellipse.fillColor = selectedItems[0].fillColor;
ellipse.strokeColor = selectedItems[0].strokeColor;
ellipse.strokeWidth = selectedItems[0].strokeWidth;
ellipse.strokeDashes = selectedItems[0].strokeDashes;
ellipse.strokeDashOffset = selectedItems[0].strokeDashOffset;
// etc etc...

Answer 1

You can make an object to store attributes you want to copy from some art item and then use that object as data for a function which takes another art item as an argument and applies all appropriate options from the data object.
My sample code here relies on having 2 path items with names of 'mySource' and 'myDest'  .
The appStyle object acts as a clipboard to hold the style attributes of the art, and uses the for-in loops to apply and copy them, which means if AI art objects had a 'copyStyle' or 'applyStyle' properties, it would mess you up, then the names would need to change to be unique.
#target illustrator
function test(){
    var doc= app.activeDocument;
    var appStyle = {
         fillColor: null,
         strokeColor: null,
         strokeWidth: null,
         strokeDashes: null,
         strokeDashOffset: null,
         copyStyle: function(sourceArt){
            var a = sourceArt;
            for(var all in this){
                if(a.hasOwnProperty(all)){
                    this[all] = a[all];
        applyStyle: function(destArt){
          var b = destArt;
            for(var all in this){
                if(b.hasOwnProperty(all) && this[all] != null){
                    b[all] = this[all];
    var mySourcePath = doc.pathItems.getByName('mySource');
    var myDestPath = doc.pathItems.getByName('myDest');
    appStyle.copyStyle(mySourcePath);
    appStyle.applyStyle(myDestPath);
test();