Creating an array thru scripting

After getting a respond at https://www.ibm.com/developerworks/community/forums/html/topic?id=dcdacecd-180a-4ce2-b70d-a178a9d4c1ac&ps=25, I decided to create an array while reading my data from a CSV file.

I define tuple and fill it. 

        tuple XTuple
        {
        string a;
        string c;
        int t;
        }
        setof(XTuple) Xtup ={ |  in locset, t in 1..time };

Then, I define an array.

int arrayX[Xtup];

Now, when I read my data set, I need to identify each and start filling arrayX accordingly.

execute{
var f = new IloOplInputFile("X.csv");
while (!f.eof){
        var str=f.readline();
        var ar = str.split(",");
        if (ar.length==4)  {
                myX[] = Opl.intValue(ar[3]);
        }
}     
f.close();
}

Could you help me out how I should fill the inside of myX[] ?