Initialize method as constructor in Ruby - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a constructor method named initialize.

Ruby

class Person
  def [1](name)
    @name = name
  end
end

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Aconstructor

Binit

Cinitialize

Dnew

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'init' or 'constructor' instead of 'initialize'.

Trying to name the method 'new' which is a class method, not the constructor.

The constructor method in Ruby is always named initialize. It is called when a new object is created.

2fill in blank

medium

Complete the code to create a new Person object with the name 'Alice'.

Ruby

person = Person.[1]('Alice')

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Anew

Binitialize

Ccreate

Dbuild

Attempts:

3 left

💡 Hint

Common Mistakes

Calling 'initialize' directly instead of 'new'.

Using methods like 'create' or 'build' which are not standard Ruby constructors.

To create a new object in Ruby, you call the class method new, which then calls initialize internally.

3fill in blank

hard

Fix the error in the initialize method to correctly assign the age parameter to an instance variable.

Ruby

class Person
  def initialize(age)
    [1] = age
  end
end

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Athis.age

Bage

Cself.age

D@age

Attempts:

3 left

💡 Hint

Common Mistakes

Assigning to a local variable instead of an instance variable.

Using 'self.age' which requires an accessor method.

Instance variables in Ruby start with @. To store the age in the object, use @age.

4fill in blank

hard

Fill both blanks to define an initialize method that sets @name and @age from parameters.

Ruby

class Person
  def initialize([1], [2])
    @name = name
    @age = age
  end
end

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Aname

Bage

Cname, age

Dfirst_name, years

Attempts:

3 left

💡 Hint

Common Mistakes

Using a single parameter with a comma inside it.

Using different parameter names that don't match the instance variables.

The initialize method parameters should match the instance variables you want to set. Here, name and age are used.

5fill in blank

hard

Fill all three blanks to create a Person class with initialize method and a method to display the name.

Ruby

class Person
  def [1](name)
    @name = name
  end

  def [2]
    puts "Name: [3]"
  end
end

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

Ainitialize

Bdisplay_name

C@name

Dshow

Attempts:

3 left

💡 Hint

Common Mistakes

Naming the constructor something other than 'initialize'.

Using a wrong variable name inside the puts statement.

Using method names that don't match the instruction.

The constructor method is initialize. The method to show the name can be called display_name. To print the instance variable, use @name.