Only after I started working on algorithm problems did I begin to appreciate the efficiency of standard loops over built-in array methods. For very large data processing there are some cases where your solution works and the ones built on array methods fail. Nice work!

So efficient, so clear!

I really like this solution because it reflects how one might sort through the coins in a real life situation.

This one rattled my mind for days! I wanted to solve with no consultations on the problem. This led me to a brute force approach which, predictably, failed for lack of time and resources. Then I looked a bit for hints and came across Warnsdorrf's rule. Things turned around quickly! So, my only suggestion on this kata would be to hint that this requires a strong grasp on solving with algorithms and heuristics, which we might need to research.

I didn't even think to use the spread operator to handle a variety of cases, such as strings, numbers, and arrays of numbers in this way. It's so much more useful and versatile than I thought. Thanks for showing me something new. 😀

Floored by this! A proper use of RegEx, in my view.

Quite clever! I thought a ternary operator necessarily begins with an evaluation only, but it seems this ternary starts with a reassignment of the variable argument (the array) that evaluates to something truthy or falsey. But I don't immediately see how it could return false.

Simple and understandable. Very nice.

Wow!

Very elegant code. Nicely done!

Wow! Great use of spread operator. Upvote.

This is an approach I'd like to see in production, because you're defining the variables in a way that is accessible throughout the program, and it's easy to maintain.