Two nearby text problems.

[jbrains]

Here’s an example that compares the values input to its output: [ (Just 1) Nothing (Just 2) ] -- input to values [ 1 2 ] -- output from values If (Just 1) is fed to ???, what should come out?

Since these are lists, I would find it less jarring to see the elements separated by commas.

(Just 1), because it’s filterMap’s job to unwrap the wrapped value and produce ` 1. If Nothing is fed to ???, what should come out?

Here you meant 1 but missed the second backtick.