Originally posted by: Marc Habib

How can I initialize a set of tuples containing an array in script:

tuple Tuple2 {
  int ar[1..2];
}

Tuple2 tuple2;
{Tuple2} tuple2Set;

execute {
// error too many arguments:
  tuple2Set.add(1,2);

  var ar = new Array();

  ar[0] = 0;
  ar[1] = 1;

  // crash:
  tuple2Set.add(ar);
}

Thanks

Originally posted by: ChrisBr

Hello Marc,

To initialize arrays in tuples by script is not allowed.
See Limitations: Value Assignments in Script Statements.
You need a .dat file for such initialization.

I hope this helps,

Chris.

Originally posted by: Marc Habib

Thanks for your answer.

Is this a safe solution ?

tuple Tuple2 {
  int ar[1..2];
}

Tuple2 tuple2;
{Tuple2} set2 = {};

execute {
    tuple2.ar[1] = 1;
    tuple2.ar[2] = 2;
    set2.add(tuple2.ar);
}

Yes, this is safe. Things are ok as long as you use an OPL array to initialize the tuple (and not a JavaScript array). This is safe as well:

range R = 1..2;
tuple T {
  int a[R];
}
{T} tuples = ...;
int dummy[R];
execute {
  dummy[1] = 1;
  dummy[2] = 2;
  tuples.add(dummy);  dummy[1] = 3;
  dummy[2] = 4;
  tuples.add(dummy);
}main {
  writeln(thisOplModel.tuples);
}