1function access(arr, i) {
2 return arr[i];
3}
4function traverse(arr) {
5 for (let i = 0; i < arr.length; i++) visit(arr[i]);
6}
7function insert(arr, pos, val) {
8 for (let i = arr.length - 1; i >= pos; i--)
9 arr[i + 1] = arr[i];
10 arr[pos] = val;
11}
12function remove(arr, pos) {
13 for (let i = pos + 1; i < arr.length; i++)
14 arr[i - 1] = arr[i];
15 arr.length--;
16}