17 - iterators module: Stack data structure pop() method part of code does nothing

[tiropictor]

https://github.com/bradtraversy/javascript-sandbox/blob/main/17-iterators-data-structures/08-stacks/script.js

following part of code does nothing and can be (should be?) removed / commented out:

    for (let i = this._count; i < this._items.length; i++) {
      this._items[i] = this._items[i + 1];
    }

Because it takes LAST element of array (which should be removed/popped out of array), then takes NEXT element (which apparently, doesn't exist, so it takes undefined), makes last element undefined and on next line of code this element is sliced out (and all the required job is actually done here):

this._items.length = this._count;

Whole this loop runs exactly ONCE (because its starting and ending points are next to each other) and doesn't really "shift left" anything.

It seems more like part of code for Queues data structure, but in wrong conditions..

Nice course anyway, thank you!