How to update ArrayCollection at runtime?

[Pratap Reddy]

Am facing some problem with arraycollection..
am having an arraycolelction like this...
var dpHierarchy:ArrayCollection = new ArrayCollection([
{Region:"Demand1"},
{Region:"Demand2"},
{Region:"Demand3"},
{Region:"Demand4"}]

now what am looking for is.. how to update this arraycollection at runtime
using actions script?
i need to update this array colelction something like this...

var dpHierarchy:ArrayCollection = new ArrayCollection([
{Region:"Demand1", Year:"2008"},
{Region:"Demand2", Year:"2008"},
{Region:"Demand3", Year:"2008"},
{Region:"Demand4", Year:"2008"}]

How to add Year field in to existing arraycollection like shown in about
example..

thanks in advance
Pratap

[Greg Lafrance]

How about have the ArrayCollection based on an Array, but add a dimension to the array to accomplish what you want.

[Pratap Reddy]

hi,,
thanks for reply...
can u help me to give some example how to do that?

thanks in advance

[Kaotic101]

There are two ways you can do this. One would be setting it straight like this.

private function updateDP():void {
dpHierarchy[0].Year = "2008";
}

This will also make it so that every other item in your ArrayCollection has
the Year identifier however nothing will be filled in for the values. The other
way you could do this would be to user setItemAt which would look like this.

dpHierarchy.setItemAt({Region:"Demand1", Year:"2008"}, 0);

which essentially does the exact same thing except your setting all the
properties of that item instead of just adding the identifier Year.

[Pratap Reddy]

hi.. s this works fine..

Any idea how to make item name dynamic..
something like..

private function updateDP():void {
for(var i:int=0;i<10;i++)
{
dpHierarchy[0].Year = "2008"; /// How to add that 'i' value over here?
}
}

i wanna add Year1, Year2, Year3 --------- like this...
is its possible??

thanks in Advance
PRatap

[Pratap Reddy]

hey got it...

just i need to give

dpHierarchy[0]["Year"] = "2008";

:-)