As the instructions said that name is a property of the object 'Players', Also we can't target the name of the player unless we use the Key Value which is the name: the structure is like that :
Players[{name: "a"}, {name: "b"} ... {name: "z}];

out of the box type of thinking, my admiration!

hell no! this func called sortByLength.

If you mean like callback function - yes it is anonymous

This solution always returns a new object

Every player (element in players array) is constructed into an object:

class Player {
  constructor(name) {
  	this.name = name;
  }
}
let players = ex_names.map((n) => new Player(n));

.name allows you to access and return the property value. If it would not be there you would return the whole object. For example Player { name: 'a' }

how is this best practice?

i can't understand why are you using name

what the magic

cool)))

Readable, close to what I did. I like it.

then this solution is not correct anymore

It's a design fault on the test cases.

does it anonymous function?

Well it was not one of the requirements to remove anything. There should be test cases with more than one ?.

Yes, so?