Also, this solution is at least 10 years old, maybe arrow function didn't exist back there. ES6 was released in 2015.

I appreciate the insight. I did initially solve it as a function declaration and refactored as an arrow function expression.

It's probably just because of the context of the question.

Like if someone asked "Hey how do I do this thing in Python?" you wouldn't answer "Well in C++ you can do it like this..."

So in this case, a function with a passed in parameter is given to you, might as well give the solution in the way it was already structured.
Though I do agree that overall, the best practice for legibility in Javascript would be having the solution as a variable function.

I just posted a very similar solution and I hadn't even thought of the fact I don't need the initial if statement checking if they are equal. Nice one...

lol

yay for single line solutions go us lol

lol

this code brings me joy lol