Final answer:
The student is asked to define a method called 'roleOf' that returns an actor's role in a movie object or indicates if the actor is not in the movie. In a programming context, this involves accessing an object's properties using 'this', and the method would be part of an object that includes the cast list.
Step-by-step explanation:
The question is asking to define a method in programming which determines the role of an actor in a movie. For example, if you call roleOf("Tom Hanks"), it should return "Forrest Gump" if Tom Hanks plays Forrest Gump in the context of the method's movie object. If the actor is not found in the movie cast, the method should return "Not in this movie."
To implement this method, you would need access to an object that contains a property, perhaps named cast, where actor names are associated with their respective roles. In JavaScript, this could be an object with keys as actor names and values as their roles. The method roleOf would use the this keyword to access the cast property from the same object and look up the role associated with the provided actor's name.
Here is a simple example in JavaScript:
function Movie() {
this.cast = {
'Tom Hanks': 'Forrest Gump',
// other actors and their roles
};
this.roleOf = function(actorName) ;
}
The Movie function acts as a constructor for movie objects, each of which has a cast property and a roleOf method. When called, the method checks if the actor's name is a key in the cast object, and if it is, returns the associated role. If not, it returns the string "Not in this movie."