Array.prototype.fill() with object passes reference and not new instance

Question

I was toying a bit and was trying to instantiate a new array of length x, where all elements of that array were initialized to a value y:

Answer 1

You can first fill the array with any value (e.g. undefined), and then you will be able to use map:

var arr = new Array(2).fill().map(u => ({}));

var arr = new Array(2).fill().map(Object);