⬅️ Execute Program Modern JavaScript
- always ordered the same way they were inserted (even with stringify and parse)
- except! when an object has number keys, (1) they always come first in the key list, (2) they’re always sorted numerically, and (3) they’re always converted into strings (1 becomes ‘1’)
Object.keys({b: 'b', 1: 'one', a: 'a'});
// Result:
['1', 'b', 'a']