Filling an array, alternative methods

fillarray.js

const length = 3;
const resultA = Array.from({ length }, () => ({}));
const resultB = Array(length).fill({});

resultA; // => [{}, {}, {}]
resultB; // => [{}, {}, {}]

resultA[0] === resultA[1]; // => false
resultB[0] === resultB[1]; // => true

/*
Happens in the 1st case bcoz, 2nd arg to Array.from() is a map function:
initialized with different instances of empty objects bcoz a new func is created

Array.fill() initializes with the same instance of an empty object.
*/