Prefer filling over spreading a new array with a size

[freaktechnik]

Yeah, let's avoid doing the proposed solution in https://itnext.io/heres-why-mapping-a-constructed-array-doesn-t-work-in-javascript-f1195138615a and use filling instead.

[freaktechnik]

Alternatives would also be Array.from({ length: size }, (u, i) => map(i)); or similar.