Prepend for method chain insertion in Ruby - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to prepend a string to another string.

Ruby

result = 'world'.[1]('Hello ')
puts result

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

Aprepend

Bappend

Cinsert

Dconcat

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'append' which adds text at the end.

Using 'concat' which also adds at the end.

The prepend method adds the given string to the beginning of the original string.

2fill in blank

medium

Complete the code to prepend 'Mr. ' to the name variable.

Ruby

name = 'Smith'
name.[1]('Mr. ')
puts name

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

Aconcat

Bprepend

Cinsert

Dappend

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'append' which adds text at the end.

Using 'insert' with wrong index.

Using prepend adds 'Mr. ' at the start of the string stored in name.

3fill in blank

hard

Fix the error in the code to prepend 'Hello, ' to the greeting string.

Ruby

greeting = 'world'
greeting.[1]('Hello, ')
puts greeting

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

Aappend

Bconcat

Cprepend

Dinsert

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'append' which adds text at the end.

Using 'concat' which adds at the end.

The prepend method modifies the string by adding the argument at the start. It returns the modified string, so assignment is optional but allowed.

4fill in blank

hard

Fill both blanks to prepend 'Hello, ' and then append '!' to the string.

Ruby

text = 'world'
text.[1]('Hello, ').[2]('!')
puts text

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

Aprepend

Bappend

Cconcat

Dinsert

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'append' first which adds at the end before prepending.

Using 'concat' instead of 'append'.

First, prepend adds 'Hello, ' at the start. Then, append adds '!' at the end.

5fill in blank

hard

Fill all three blanks to prepend 'Hello, ', convert to uppercase, and then append '!' to the string.

Ruby

text = 'world'
text = text.[1]('Hello, ').[2].[3]('!')
puts text

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

Aprepend

Bupcase

Cappend

Ddowncase

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'downcase' instead of 'upcase'.

Appending before prepending.

First, prepend adds 'Hello, ' at the start. Then upcase converts the whole string to uppercase. Finally, append adds '!' at the end.