Getting change values from a collection

Question

Title says it all. I have a collection connected to a
datagrid and have a simple form that allows me to add/modify/delete
entries from the collection. Now I want to send the changes to the
collection back to the server. How do I read/parse the collection
for these changes? Examples would be helpful. Below is what I have
so far to examine the collection (found elsewhere) how do I extract
the name/value pairs that have changed?
public function
collectionEventHandler(event:CollectionEvent):void {
switch(event.kind) {
case CollectionEventKind.ADD:
addLog("Item "+ event.location + " added");
break;
case CollectionEventKind.REMOVE:
addLog("Item "+ event.location + " removed");
break;
case CollectionEventKind.REPLACE:
addLog("Item "+ event.location + " Replaced");
break;
case CollectionEventKind.UPDATE:
addLog("Item updated");
break;
}

Answer 1

ArrayCollection supports the length property, so you can
simply iterate over it with a for loop and use the bracket notation
to return each item. Build the structure you want to sent, then
away you go.
If you are wanting to only select changed values, you will
have to track this yourself.
Tracy