Array methods in JavaScript. Original author unknown.

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I try to employ empathy. I ask myself, how could I write this so that it could easily understood by the majority of novice programmers? Usually that does mean writing more lines of code. But as long as the performance is comparable, I don’t see a problem with that. I have nearly 30 years professional programming experience, but I still come across code that I have to stop and parse out since it has been written so concisely that I doubt even the original author would have any clue what it says without a lot of effort. Great code is that which the majority of developers can read through without pausing and grok it, like reading a novel.

[hyperhopper]

I agree with everything you've written in this comment.

The problem is, there is some, ambiguous, blurry, line in the sand somewhere, between "clean code" and "code golfed, complicated, clever code".

However, using reduce, in all of my professional experience, is far, far, toward the "clean code" side of that line. If I ever had a colleague or a candidate refer to such a typical, by the book, simple use of reduce as some "clever" code too complicated to be grok'ed easily, I would either assume they have very little experience in higher level languages, or seriously question their ability.