Question

Define a method named roleOf that takes the name of an actor as an argument and returns that actor's role. If the actor is not in the movie return "Not in this movie.". Ex: roleOf("Tom Hanks") returns "Forrest Gump". Hint: A method may access the object's properties using the keyword this. Ex: this.cast accesses the object's cast property.

Answer 1

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."

Answer 2

The 'roleOf' method within a Movie class should return an actor's role by accessing the 'cast' property using 'this'. If the actor isn't in the cast list, it returns 'Not in this movie.'.

Step-by-step explanation:

The question refers to defining a method within an object in a programming context. The method roleOf should take an actor's name as an argument and return the corresponding role of that actor within a movie object. If the actor's name does not match any within the movie object's cast, it should return 'Not in this movie.'.

To implement this, we can assume there is an object representing a movie with a property, perhaps called cast, which would be an associative array or dictionary linking actors to their respective roles. The use of the keyword this is essential as it will allow the method to access properties of the object it belongs to.

Here's a hypothetical example of how this might be structured within a class or object literal:

class Movie {
constructor() {
this.cast = {
'Tom Hanks': 'Forrest Gump',
// ...other actors and their roles
};
}

roleOf(actorName)
}

In this example, a movie object's roleOf method would check the cast property for the provided actor's name as the key, and if found, return the associated role; otherwise, it returns the string indicating the actor is not in the movie.