const numbers = [1, 2, 3, 4, 5]
  numbers.splice()
  console.log(numbers)                // -> remove all items

  const numbers = [1, 2, 3, 4, 5]
	numbers.splice(0,1)
  console.log(numbers)            // remove the first item

  const numbers = [1, 2, 3, 4, 5, 6]
	numbers.splice(3, 3, 7, 8, 9)
  console.log(numbers.splice(3, 3, 7, 8, 9))  // -> [1, 2, 3, 7, 8, 9] //it removes three item and replace three items