A good JavaScript to add/remove items from/to array?

Question

folks! Today I created this script that has the following functionality:

• add new items to array
• list all items from the array
• remove an item from

Answer 1

Here is another sugestion:

function remove(arr, index) {
  if (index >= arr.lenght) { return undefined; }
  if (index == 0) {
    arr.shift();
    return arr;
  }

  if (index == arr.length - 1) {
    arr.pop();
    return arr;
  }
  var newarray = arr.splice(0, index);
  return newarray.concat(arr.splice(1,arr.length))
}