var collection:ArrayCollection = new ArrayCollection();

collection.addItem({bar:"bar1", foo:1});
collection.addItem({bar:"bar2", foo:2});
collection.addItem({bar:"bar3", foo:3});
collection.addItem({bar:"bar4", foo:4});

var sort:Sort = new Sort();
sort.fields = [new SortField("foo")];

collection.sort = sort;
collection.refresh();

collection.addEventListener(CollectionEvent.COLLECTION_CHANGE, function(e:CollectionEvent):void {
	
	trace(e.type);
	
});

collection.disableAutoUpdate();
			
var cursor:IViewCursor = collection.createCursor();

while (!cursor.afterLast) {
	
	cursor.current.foo++;
	
	cursor.view.itemUpdated(cursor.current);
	
	cursor.moveNext();
	
}

collection.enableAutoUpdate();