let arr = [1, 2, 3];
arr.slice().reverse().forEach(x => console.log(x))will print:
3
2
1
arr will still be [1, 2, 3], the .slice() creates a shallow copy.
let arr = [1, 2, 3];
arr.slice().reverse().forEach(x => console.log(x))will print:
3
2
1
arr will still be [1, 2, 3], the .slice() creates a shallow copy.