Object#dup and Object#clone in Ruby - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a shallow copy of the object using the correct method.

Ruby

copy = original.[1]

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

Adup

Bclone

Ccopy

Dnew

Attempts:

3 left

💡 Hint

Common Mistakes

Using clone instead of dup when singleton methods are not needed.

Trying to use a non-existent method like copy or new.

The dup method creates a shallow copy of the object without copying its singleton methods.

2fill in blank

medium

Complete the code to create a copy of the object including its singleton methods.

Ruby

copy = original.[1]

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

Acopy

Bclone

Cdup

Dnew

Attempts:

3 left

💡 Hint

Common Mistakes

Using dup when singleton methods need to be copied.

Using non-existent methods like copy or new.

The clone method copies the object including its singleton methods and frozen state.

3fill in blank

hard

Fix the error in the code to correctly duplicate the object without copying singleton methods.

Ruby

new_obj = obj.[1]

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

Acopy

Bclone

Cdup

Dnew

Attempts:

3 left

💡 Hint

Common Mistakes

Using clone which copies singleton methods.

Using non-existent methods like copy or new.

The dup method duplicates the object without copying singleton methods, which is the intended behavior here.

4fill in blank

hard

Fill both blanks to create a clone of the object and check if the clone is frozen.

Ruby

cloned_obj = obj.[1]
is_frozen = cloned_obj.[2]

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

Aclone

Bdup

Cfrozen?

Dfreeze

Attempts:

3 left

💡 Hint

Common Mistakes

Using dup instead of clone when singleton methods are needed.

Using freeze instead of frozen? which is a predicate method.

clone creates a copy including singleton methods, and frozen? checks if the object is frozen.

5fill in blank

hard

Fill all three blanks to duplicate an object, freeze the duplicate, and check if it is frozen.

Ruby

duplicate = obj.[1]
duplicate.[2]
is_frozen = duplicate.[3]

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

Adup

Bfreeze

Cfrozen?

Dclone

Attempts:

3 left

💡 Hint

Common Mistakes

Using clone instead of dup when singleton methods are not needed.

Using frozen? instead of freeze to make the object immutable.

Using freeze instead of frozen? to check frozen state.

dup duplicates the object without singleton methods, freeze makes the object immutable, and frozen? checks if it is frozen.