Use of higher-order functions not being taught

Challenge Name

Higher-order functions challenges, e.g. https://www.freecodecamp.com/challenges/filter-arrays-with-filter

Issue Description

The code in the screenshot below lets the learner pass the challenge simply by reading “create a new array with all the values from oldArray which are less than 6”, seeing val !== 5 and changing it to val < 6, without having to understand that the higher-order function is passing each of the array’s elements to the callback function (as val), and the syntax for that. I’ve helped a learner on Gitter with this lack of knowledge, which prompted me to create this issue.

I suggest the callback function is changed to /* your function here */.

Screenshot

[VarCI-bot]

Hi @willnwhite

The issue tracker is for reporting bugs only. If this is a request for help with a challenge, please use the help chat room or try looking through the forum for help with a specific challenge.

If this is the case, please close this issue.

Happy Coding.

– Automated response by Var.CI 🤖

[willnwhite]

Hi @no-stack-dub-sack. The Contributor’s Guide is worded as though the reader was looking to work on an issue they hadn’t raised themselves: “Find an issue that needs assistance by searching for the Help Wanted tag.” So I didn’t think about that as I didn’t think it was intended for me. I’m happy to propose a change to the wording.

As we’ve both spent time finding out for ourselves, the issue doesn’t apply in the development version of the website. I hope having two versions of the website will be avoided in future, to minimise hurdles for more casual contributions. I’ve raised this on the discussion forum: https://forum.freecodecamp.com/t/have-one-single-version-of-fcc-not-a-beta-too/117837.

For interest’s sake, I suggested the example be:

array = array.filter(/* your function here */);

The answerer has to learn how to write a callback function for a higher-order function, where presently they can skip that (and end up in the chat room).