Yes, I had a problem where I tried to do the exact same way, but I was encountering problems because my keys weren't going in order.

The strength of these series of exercizes is to use helper functions to practice your functional programming skills rather than use a for loop.

A list of them are here: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array

Hope you enjoy! :)

you realize you can just change the parameter name?

unchanged variable declared as "let." Use "const" instead.

This might have been the intention behind this exercize though? Hard to say....

[...array] creates a temp array. No temp arrays allowed in this exercize

nooooooo, I was totally onboard until you made the temp array (line 8). Not allowed in this exercize.

temp array

no other Arrays allowed. (zeros, normal)

no temp Arrays allowed.

"length" is an attribute of Array, not a method of Array, so it's ok.

The function here is just for grouping and doesn't add any special method classes that do work. You can easily copy the function code and put it exactly where the function call is and it will work exaclty the same.
Not as true to the specs as it could to be, and not as efficient as it should be, but I wouldn't call it 'cheating'

join() method returns a string, so you don't need a toString() method.

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/join

YOU'VE BEEN RICK ROLLED!!!!

Never mind, I figured it out! YAY!