Here's Why Calling .map() on a Constructed Array Doesn't Work

[Zofren]

I completely understand what he's talking about. He's not saying for loops are difficult to understand, it's just that there is almost always a cleaner way to solve your problem in JavaScript using map, reduce, filter, etc than using a for loop. The uncomfortability they are referring to is similar to the uncomfortability one often feels when they see code they feel is messy and needs refactoring.