JS Basic Data Structures section

Hi! I’m working on the JS cert (as a refresher for prev experience) and I’m finding the Basic Data Structures section a little out of place. Most of the lessons are already covered in the first Basic JavaScript section. Also, some of the writing tone and challenges seem to break format from previous sections - like this one, it just struck me as odd to present a specific task like that as a function. Is the section meant more as reinforcement/practice?

I’m interested in contributing but saw there’s a rehaul in progress, so I’m not sure if any discussion is still wanted on the current curriculum ^^