Learn map(), filter() and reduce()?

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In Javascript Algorithms And Data Structures Certification (300 hours) I was wondering if learning map(), filter() and reduce() was out of order now that the certs have changed. There was a lesson before this one that also had us apply map(), filter() and reduce() on the parameters of an array, but I don’t think we’ve had a lesson on these yet. I know some things we have to go learn on our own but do these qualify to be in that category? I only ask because I’ve seen a lesson about them down below in the subsection Functional Programming.

Link to the challenge:
https://learn.freecodecamp.org/javascript-algorithms-and-data-structures/es6/use-the-rest-operator-with-function-parameters

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Yeah, you get a fairly thorough explanation in the functional programming section: it is out of order (personally I would say do the FP section first then it’ll make more sense, but up to you)

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