Flash push item inside of an array - actionscript-3

Question

Im needing some help in AS#3 and arrays
Basically i am having trouble of pushing items into a 2D array with errors.
Below is what i have and trying to use:
var j = 0
var i = 0
var mixerArray:Array = new array();
function Mixer()
{
optionLenght = gridOption.sequence_txt.text;// == 8
track_list = gridOption.track_text.text;// == 4
for (j = 0; j <track_list; j++)
{
make_tracks();
for (i = 0; i <optionLenght; i++)
{
item_inside_track();
}
}
function make_tracks(){
tracks = new Tracks();//a large box
MixerArray[j].push(tracks);
}
/* Make little boxes inside big box
..................................................
*/
function item_inside_track(){
box= new Box();//littlebox
MixerArray[j][i].push(box); // iwant to push this box into track[j]
}
basically im trying to create an array that stores values inside of values for example
MixerArray()
[0]TRACK1 = [0]//littlebox ,[1]//littlebox, [2]//littlebox [3]//littlebox etc to 8
[1]TRACK2 = [0]//littlebox ,[1]//littlebox, [2]//littlebox [3]//littlebox etc to 8
[2]TRACK3 = [0]//littlebox ,[1]//littlebox, [2]//littlebox [3]//littlebox etc to 8
[3]TRACK4 = [0]//littlebox ,[1]//littlebox, [2]//littlebox [3]//littlebox etc to 8
This has to be dynamic, as it will constant change..i have cut the addchilds and other code to minimize it to the source area.

Answer 1

So you're basically creating an array of arrays.
The problem here is that you're trying to push items into an element of the second array.
MixerArray[j][i].push(box); // iwant to push this box into track[j]
If you want to push into the J array, you just have to do this:
MixerArray[j].push(box);
However, you need to create the different Arrays contained in MixerArray first. Just push new Arrays into MixerArray in an initialisation function or at the start of your first function . Another issue with your code is that you used:
var mixerArray:Array = new array(); while in the rest of your code you're using:
MixerArray
Make the changes and tell me if it works !