Easy to read and understand compared to the other solutions though it will have overall time complexity is O(n).

added.

I may aswell approve this.

nice you are now 4kyu !!!! asking make you more smarter!

Best solution, imho

Js array split and join method both use for loops underneath the hood making your solution have a time complexity of O(n + m) but solving in string without converting to array the for loop runs only once and gives a better solutions with O(n) time complexity.

Python translation:
https://www.codewars.com/kumite/60de42b5d8caf60042fc7b7e?sel=60de42b5d8caf60042fc7b7e

Need to add random tests

Cool answer. I was trying to do something like this but failed.

Please suggest better wording.

For now, closing the issue; it's been six months and it doesn't look like it's going to be addressed without a suggested improvement.

wording is not clear

This solution fails for numeric values of 0. The ternary operator should have this>=0 or have this<0 and the last two arguments swapped.