Deleting item on array without leaving holes in the array

JSArrayDeleteExample.md

Using delete on an array works but there will be holes in the array, use splice instead.

Wrong

  const arr = ['dog', 'cat', 'pig']
 delete arr[arr.length - 1];
  console.log(arr); // ['dog', 'cat', '']

Correct

  const arr = ['dog', 'cat', 'pig']
  arr.splice((arr.length -1), 1)
  console.log(arr); // ['dog', 'cat']