Pipeline operator concept in Ruby - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to use the pipeline operator to convert a string to uppercase.

Ruby

result = "hello" [1] String.upcase

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

A->

B::

C|>

D=>

Attempts:

3 left

💡 Hint

Common Mistakes

Using '->' which is for lambdas, not pipelines.

Using '::' which is for constants or modules.

Using '=>' which is for hashes.

The pipeline operator |> passes the value on the left as an argument to the method on the right.

2fill in blank

medium

Complete the code to chain two methods using the pipeline operator.

Ruby

result = "  ruby  " [1] String.strip [2] String.upcase

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

A->

B|>

C::

D=>

Attempts:

3 left

💡 Hint

Common Mistakes

Using different operators for chaining.

Forgetting to repeat the operator between methods.

The pipeline operator |> allows chaining methods by passing the result of one method to the next.

3fill in blank

hard

Fix the error in the pipeline usage to correctly reverse and then capitalize a string.

Ruby

result = "hello" [1] String.reverse [2] String.capitalize

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

A|>

B||

C&&

D->

Attempts:

3 left

💡 Hint

Common Mistakes

Using logical operators like '||' or '&&' which do not chain methods.

Using '->' which is for lambdas.

The pipeline operator |> correctly passes the output of one method as input to the next.

4fill in blank

hard

Fill both blanks to create a pipeline that doubles a number and then converts it to a string.

Ruby

result = 5 [1] 2.method(:*) [2] String

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

A|>

B*

D+

Attempts:

3 left

💡 Hint

Common Mistakes

Using arithmetic operators instead of pipeline operators between methods.

Mixing different operators for chaining.

The pipeline operator |> is used twice to chain the multiplication and string conversion.

5fill in blank

hard

Fill all three blanks to create a pipeline that trims spaces, reverses, and then converts to uppercase.

Ruby

result = "  ruby " [1] String.strip [2] String.reverse [3] String.upcase

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

A|>

D->

Attempts:

3 left

💡 Hint

Common Mistakes

Using different operators in the chain.

Using lambda arrow '->' instead of pipeline operator.

Use the pipeline operator |> for all three steps to chain the methods properly.