[[Property:modification_date|Mon, 10 Sep 2018 09:06:41 GMT]]
[[Property:publication_date|Fri, 07 Sep 2018 12:13:00 GMT]]
[[Property:uuid|78393BBA-9B1E-4523-9881-3D83CEB6A952]]
[[Property:weight|3000]]
[[Property:title|Removing object while iterating on a LIST]]
If you already have the object that you want to remove from the `LIST` you can easily use `prune` and `prune_all`. But if you want to remove objects while iterating on that `LIST`, depending on criteria on the objects contained in the `LIST`, here is what you can do.

First of all, if you think about removing an object while iterating, I do not recommend using an `across` loop. If you iterate on the list using a `from until loop end`, just remember to use the `LIST.forth` only when you do not use `LIST.remove`.

For example, let's say we have class `MY_CLASS` with an attribute `has_stopped` and that I want to remove every object of a `LIST` that has this attribute set to `True`. Here is what the code will look like.

<code>
	removing_stopped (a_list: LIST [MY_CLASS])
			-- Removing every closed element of `a_list`
		do
			from
				a_list.start
			until
				a_list.exhausted
			loop
				if a_list.item.has_stopped then
					a_list.remove
				else
					a_list.forth
				end
			end
		end
</code>