Instantiating an entity in a for loop with a specified step

This site is best viewed in a modern browser with JavaScript enabled.

Instantiating an entity in a for loop with a specified step

dls

When instantiating an entity in a for loop with a specified step, an error is obtained when using the index in this for of instantiation :

scenario Test1 {
    println("Model Test1 ready to run")
    for (let i=5; i<100; i=i+5) {
      print(i+" ")
      let p= new Parcel => [id=i]
    }
}

entity Parcel {
   property Integer id
   property Integer landcover
}

padeg

The basic idea when using the => [ property=value ] syntax to initialize a new entity is that the value must be a constant.

When stating for (let i=5; ...) we define i with a let statement and then it is a variable and not a constant and this is why it is not accepted in the => [ ] declaration.

One may note however that when writing a for loop like this : for (i:listOfValues) {...} the i is not a variable (there is no let statement), it is considered as a constant extracted from the list of values. Hence it is possible to use i as a value to initialize an entity with the => [ ] syntax in that case.