Accessing parent methods in Ruby - Cheat Sheet & Quick Revision

Recall & Review

beginner

What keyword in Ruby is used to call a method from the parent class?

The <code>super</code> keyword is used to call a method from the parent class in Ruby.

intermediate

How does super behave when called without arguments inside a method?

When super is called without arguments, it passes all the arguments received by the current method to the parent method.

intermediate

What happens if you call super() with empty parentheses in a method?

Calling super() with empty parentheses calls the parent method without passing any arguments, even if the current method received some.

advanced

Can super be used to access parent methods with different names?

No, super calls the parent method with the same name as the current method. To call a differently named parent method, you must call it explicitly with ParentClassName.method_name.

beginner

Example: How to override a method and still use the parent method's behavior in Ruby?

You override the method in the child class and inside it call <code>super</code> to reuse the parent method's code. For example:<br><pre>class Parent
  def greet
    "Hello"
  end
end

class Child < Parent
  def greet
    super + ", world!"
  end
end

Child.new.greet # =&gt; "Hello, world!"</pre>

In Ruby, what does super do inside a method?

A Calls the parent class's method with the same name

B Calls any method from the parent class

C Calls a method from a sibling class

D Calls the current method recursively

super calls the parent class's method that has the same name as the current method.

What happens if you call super() with empty parentheses in a Ruby method?

A Passes no arguments to the parent method

B Causes an error

C Passes all current method arguments to the parent method

D Calls a different method in the parent class

super() calls the parent method without passing any arguments.

If a child method receives arguments but calls super without parentheses, what happens?

A Parent method is called with no arguments

B Parent method is called with the same arguments

C Parent method is not called

D An error is raised

Calling super without parentheses passes the current method's arguments to the parent method.

How can you call a parent method with a different name than the current method?

A It is not possible

B Using <code>super</code> with the method name

C Using <code>super()</code> with arguments

D Using <code>ParentClassName.method_name</code>

You must call the parent method explicitly by its class and method name.

What is the purpose of using super in a child class method?

A To call a method from another unrelated class

B To completely replace the parent method

C To extend or reuse the parent method's behavior

D To call the child method recursively

super helps reuse or extend the parent method's code inside the child method.

Explain how the super keyword works in Ruby when overriding methods.

Think about how you can reuse code from the parent method inside the child method.

Describe how to call a parent class method that has a different name than the current method in Ruby.

Remember that super only calls methods with the same name.