Creating Arrays Ref. 2ality
An array literal:
[0, 0, 0]
Note that (sparse) arrays can have holes:
["a",, "c"]
The Array constructor:
new Array(3)
The Array constructor plus array.fill:
new Array(3).fill(0)
array.push:
{ const array = []; for (let i = 0; i < 3; ++i) { array.push(0); } return array; }
Array.from with an iterable:
Array.from(new Array(3))
Array.from with a length property:
Array.from({length: 3})
Spreading an iterable:
[...new Array(3)]
Mapping with Array.from:
Array.from({length: 3}, () => 0)
Array.from({length: 3}, (_, i) => i)
Spreading array.keys:
[...new Array(3).keys()]