Method chaining patterns in Ruby - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to chain methods that convert a string to uppercase.

Ruby

"hello".[1]

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

Areverse

Bupcase

Cdowncase

Dcapitalize

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'downcase' which makes letters lowercase.

Using 'capitalize' which only changes the first letter.

The upcase method converts all letters in the string to uppercase.

2fill in blank

medium

Complete the code to chain methods that remove whitespace and then reverse the string.

Ruby

"  ruby  ".[1].reverse

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

Achomp

Bstrip!

Cstrip

Ddelete

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'strip!' which modifies the string in place and returns nil if no changes.

Using 'chomp' which removes newline characters only.

The strip method removes leading and trailing whitespace without changing the original string.

3fill in blank

hard

Fix the error in the method chain that tries to convert a string to an integer and then add 5.

Ruby

"10".[1] + 5

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

Ato_s

Bto_sym

Cto_f

Dto_i

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'to_s' which keeps it a string and causes an error when adding a number.

Using 'to_sym' which converts to a symbol, not a number.

The to_i method converts the string to an integer so you can add numbers.

4fill in blank

hard

Fill both blanks to chain methods that split a sentence into words and then sort them alphabetically.

Ruby

"hello world ruby".[1]([2]).sort

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

Asplit

B" "

C,

Djoin

Attempts:

3 left

💡 Hint

Common Mistakes

Using ',' as a separator which does not split words correctly.

Using 'join' which combines words instead of splitting.

The split method breaks the string into words using a space (" ") as the separator, then sort arranges them alphabetically.

5fill in blank

hard

Fill all three blanks to chain methods that remove vowels from a string, convert it to uppercase, and then reverse it.

Ruby

"example".[1]([2]).[3].reverse

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

Adelete

B"aeiou"

Cupcase

Ddowncase

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'downcase' instead of 'upcase' changes case incorrectly.

Not specifying vowels correctly in the delete method.

The delete method removes all vowels specified in "aeiou", then upcase converts the result to uppercase, and finally reverse reverses the string.