Removing and printing items from the text box.

[smithcgl9043167]

Greetings everyone!
After a few months of pausing in my studies, I decided to return and soon I ran into an error in the script I picked up on this one on page 31 of this manual: https://adobeindd.com/view/publications/a0207571-ff5b-4bbf-a540-07079bd21d75/92ra/publication-web-r... 

My question is: How to return only the items in the text box after deleting some? It prints all items even after deleting. Where's the error?
Thank you

var w = new Window ("dialog");
var array= ["one", "two", "three", "four"]
var lbx = w.add ("listbox", undefined, array, {multiselect: true});
var del = w.add ("button", undefined, "Delete selected items");

del.onClick = function () {
     // remember which line is selected
     var sel = lbx.selection[0].index;
     for (var i = lbx.selection.length-1; i > -1; i--)
     lbx.remove (lbx.selection[i]);
     // select a line after deleting one or more items
     if (sel > lbx.items.length-1)
     lbx.selection = lbx.items.length-1;
     else
     lbx.selection = sel;
}

var print = w.add ("button", undefined, "Print selected items");
    print.onClick = function () {
     for (var i = 0; i < array.length; i++)
     alert(array[i]);
}
w.show ();

[r-bin · Accepted solution]

It is necessary to remove elements from the array at the same time as removing the list elements.

Or don't use an array, but use lbx.items.

var print = w.add ("button", undefined, "Print selected items"); // why selected???
    print.onClick = function () {
     for (var i = 0; i < lbx.items.length; i++)
     alert(lbx.items[i].text);
}

[smithcgl9043167]

Great, it worked now! Thank you r-bin , I am happy to know that you still attend this community.

[schroef]

How are items removed from an array. I've tried so many things but it simply won't work.

Why I test typeof(arrayName), it returns an object even though declared as array.  I believe estk tells an array to be an object.

But I can get it to work to remove an item of that array.