Filtering a datagrid without using filterFunction?

[EvolvedDSM]

Hello, I'm looking for a way to filter a datagrid without applying a
filterFunction on the arrayCollection. The filter is static. I need it to
filter out a particular column of a table that has no value, so only the items
that do have a value in that column will be displayed. The reason why I do not
want to use a filterFunction on the arrayCollection is because the array would
need to be refreshed every time I update an item and for the way I've done
things, I am not sure how that would work.

So is there another way to filter a dg?

[BaliHi]

The phrasing of your question seems to provide the answer. "Is there any way
to filter without a filterfunction" - well probably not. So to meet your needs
you should either populate your arrayCollection using different logic, or else
go with the filterfunction. By the way, the arraycollection has an
eventListener built in so you can automatically detect when the contents has
changed (using a listener) - see CollectionEvent.COLLECTION_CHANGE.

[EvolvedDSM]

Could you help with with implementing the addEventListener? I've checked the
documentation for CollectionEvent, however alot of the info went right over my
head.

How can I write an addEventListener that will detect changes to my AC?