Has the term "higher order functions" ever been mentioned before in an assignment for the assignment called "ES6: Write Higher Order Arrow Functions"?

[rekurzion]

Challenges on stuff I haven't seen yet?

yes, you are correct. having just gone through this module you run into this a few times. it seems there was some house cleaning done to inject the new ES6 specification and some holes were created. as is in chess be mindful of the space left behind. the filter, map and reduce methods are not covered until the functional program module and even there the map challenge makes references to a previous mention of map usage. but if you search for map in the FCC library you will notice that nearly a…