Super keyword behavior in Ruby - Mini Project: Build & Apply

Super Keyword Behavior

📖 Scenario: Imagine you are creating a simple system to manage employees and managers in a company. Managers are employees but with extra responsibilities. You want to reuse the employee's greeting message and add a special note for managers.

🎯 Goal: Build a Ruby program that shows how the super keyword works by calling a method from a parent class inside a child class method.

📋 What You'll Learn

Create a class called Employee with a method greet that returns the string "Hello from Employee".

Create a class called Manager that inherits from Employee.

In Manager, override the greet method to call super and add " and Manager here!" to the returned string.

Print the result of calling greet on an instance of Manager.

💡 Why This Matters

🌍 Real World

Understanding how to reuse code from parent classes helps you write cleaner and more maintainable programs, especially when working with related objects like employees and managers.

💼 Career

Inheritance and the <code>super</code> keyword are fundamental concepts in object-oriented programming used in many software development jobs to build scalable and organized code.

1

Create the Employee class with greet method

Create a class called Employee with a method greet that returns the string "Hello from Employee".

Ruby

# Define class Employee with greet method
# Your code here

Need a hint?

Use class Employee to start the class and define def greet method inside it.

2

Create Manager class inheriting Employee

Create a class called Manager that inherits from Employee.

Ruby

class Employee
  def greet
    "Hello from Employee"
  end
end

# Define class Manager inheriting Employee
# Your code here

Need a hint?

Use class Manager < Employee to inherit from Employee.

3

Override greet in Manager using super

In class Manager, override the greet method to call super and add " and Manager here!" to the returned string.

Ruby

class Employee
  def greet
    "Hello from Employee"
  end
end

class Manager < Employee
  # Override greet method here
  # Your code here
end

Need a hint?

Inside def greet, use super to call the parent method and add the extra string.

4

Create Manager instance and print greet result

Create an instance of Manager called mgr and print the result of calling mgr.greet.

Ruby

class Employee
  def greet
    "Hello from Employee"
  end
end

class Manager < Employee
  def greet
    super + " and Manager here!"
  end
end

# Create Manager instance and print greet
# Your code here

Need a hint?

Create mgr = Manager.new and print mgr.greet using puts.