Dynamic tuple set array initialization and population using OPL script

Here's a sample to dynamically initialize and populate a tuple set array indexed over another tuple set:


tuple TIndex{
  key int id;
}
tuple TIndexedArray{
  key int id;
  key int value;
}
{TIndex} index;
{TIndexedArray} indexedArray[index];
execute {
  var i, j, k, ti;
  for (i=0; i<5; i++){
    index.add(i);
  }
  for (i=0;i<5;i++){    
    ti = index.get(i);
    for(j=0;j<2;j++){
    k = 10*i+j;
    indexedArray[ti].add(j,k);
    }    
  }
  writeln("index="+index);
  writeln("indexedArray="+indexedArray);
}  

Users need to aware about the concepts of 'lazy initialization' in OPL. Care must be taken that the indexer tuple set is completely populated before touching the dependant tuple set array. More about the pitfalls of lazy initialization can be found in the here.