Getting myGrid.selectedItems to properly *select*...

Question

I have an application with a popup window that is created
from a function on click. The popup has a datagrid. The "get all
data" function for the grid is coming from a simple component that
brings in the data, called inside the popup - lets say an AC
allData. The comopnent inside the popup broadcasts an event saying
"done loading" and I'm handling that event in the popup to select
myData.selectedItems, based on the data passed from a custom event
in the man application..
The grid properly displays all data from the data component.
The selectedItems arrayCollection is definitely available to the
popup. It is an AC of myValueObject, seen in the debugger. The
manager's "get all data" is also an AC of myValueObject.
In the above scenario, it doesn't work when I say
myGrid.selectedItems = selectedData as Array.
Instead, I have another function "getSelection(selectedData)"
which basically loops through the selectedData AC and
pushes each item to a new Array and returns that array. I've
triple checked this, and it also does not work. As a test, to make
sure its not realted to the "loading" process of the popup, I've
even set the "getSelection" function to run via a button's click so
that it is well after everything is loaded in the popup. It still
selects nothing.
BUT! If I have "myGrid.selectedData = getSelection(allData)"
where allData is the same exact AC that is used to populate the
grid's dataProvider, it selects all items in the grid. What's
totally odd, is the AC from the dataProvider and the AC for
selectedData look absolutely *identical* in the debugger, minus a
bunch of items for the selectedData, as it should be.
The only working alternative I can figure out is to create
another function in the data component that "re-gets" the
selectedData. While this works, it is unfortunately not acceptible,
because other areas of the application might change the
selectedData, without calling to the database. I need to keep
moving that data around to components all over the application
freely without calling him.
Any thoughts on what's wrong here?
Here's a screen capture to emphasize the complication:
qnotemedia.com / wontwork.gif
...note that in the above example, only arSecondSelection
actually works. The others select nothing.

Answer 1

Got it!
It appears that selectedItems is dependent on the data being
absolutely identical to the dataProvider. And while I thought my
data was identical, it really wasn't. In the debugger, if you look
at a variable, its always: "Array (@123456)". What I found was that
although the data was definitely the same, the number was not.
To fix the problem, I centralized all data to go through one
data manager, whereas before I was reinitializing a different data
component in each component.
So now, I'm basically calling
parentApplication.dataManager.someFunction() from all of my
components. This isn't good quite frankly, but by doing so, the
@123456 is always the same.
If anyone else can think of a better way, I'm all
ears...