Specifying a Fancy Microwave Oven

Inheritance is used to propagate—that is, copy—functionality from one class to another. To create a child class from another class, use the inherit argument to R6Class() (docs).

The pattern to create a child class is:

child_class_factory <- R6Class(
  "ChildClass",
  inherit = parent_class_factory
)

This exercise is part of the course

Object-Oriented Programming with S3 and R6 in R

View Course

Exercise instructions

A microwave oven class has been defined for you in the variable microwave_oven_factory.

Create a FancyMicrowaveOven class that inherits from MicrowaveOven.
- Call R6Class() (docs).
- The classname argument should be "FancyMicrowaveOven".
- The inherit argument should be microwave_oven_factory.
- Assign this to the variable fancy_microwave_oven_factory. Do not add any extra functionality yet.

Hands-on interactive exercise

Have a go at this exercise by completing this sample code.

# Explore the microwave oven class
microwave_oven_factory

# Define a fancy microwave class inheriting from microwave oven
fancy_microwave_oven_factory <- ___

Edit and Run Code