Include for instance methods in Ruby - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to include the module for instance methods.

Ruby

module Greetings
  def hello
    "Hello!"
  end
end

class Person
  [1] Greetings
end

p = Person.new
puts p.hello

Drag options to blanks, or click blank then click option'

Aimport

Bextend

Crequire

Dinclude

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'extend' instead of 'include' which adds methods as class methods.

Using 'require' or 'import' which are for loading files or libraries.

In Ruby, include adds module methods as instance methods to a class.

2fill in blank

medium

Complete the code to call the instance method from the included module.

Ruby

module Farewell
  def goodbye
    "Goodbye!"
  end
end

class Friend
  include Farewell
end

f = Friend.new
puts f.[1]

Drag options to blanks, or click blank then click option'

Afarewell

Bgoodbye

Chello

Dbye

Attempts:

3 left

💡 Hint

Common Mistakes

Calling a method not defined in the module.

Using a method name that does not exist on the instance.

The instance method defined in the module is goodbye, so calling f.goodbye works.

3fill in blank

hard

Fix the error by completing the code to include the module correctly.

Ruby

module Helper
  def assist
    "Assisting"
  end
end

class Worker
  [1] Helper
end

w = Worker.new
puts w.assist

Drag options to blanks, or click blank then click option'

Aextend

Bimport

Cinclude

Dprepend

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'extend' which adds methods as class methods.

Using 'import' which is not a Ruby keyword.

To add instance methods from a module, use include. extend adds class methods.

4fill in blank

hard

Fill both blanks to define a module and include it for instance methods.

Ruby

module [1]
  def greet
    "Hi!"
  end
end

class User
  [2] GreetModule
end

u = User.new
puts u.greet

Drag options to blanks, or click blank then click option'

AGreetModule

Bextend

Cinclude

DGreeting

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'extend' instead of 'include' to add instance methods.

Using a module name that does not match the definition.

The module name is GreetModule and it is included using include to add instance methods.

5fill in blank

hard

Fill all three blanks to create a module, include it, and call its instance method.

Ruby

module [1]
  def welcome
    "Welcome!"
  end
end

class Member
  [2] WelcomeModule
end

m = Member.new
puts m.[3]

Drag options to blanks, or click blank then click option'

AWelcomeModule

Binclude

Cwelcome

Dextend

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'extend' instead of 'include' to add instance methods.

Calling a method name that does not exist in the module.

Mismatching module name in definition and inclusion.

The module is named WelcomeModule, included with include, and the instance method welcome is called on the object.