Function

splice

changes content of an array. Let's first create an array of integers

let myFavoriteNumbers = [5, 14, 16, 18, 23, 25, 27, 50, 70]

If we want to remove one element from an array, we need to pass

1

as the second argument and the index of the item as the first argument. In this example

14

(second item) will be removed by passing

1 and 1

as arguments

myFavoriteNumbers.splice(1, 1);  // [5, 16,18, 23, 25, 27, 50, 70]

To remove two adjacent items, we need to pass first item's index

2

and quantity of items

2

that we want to remove. In this example we want to remove

18

and

23

from the array at the same time

myFavoriteNumbers.splice(2, 2);  // [5, 16, 25, 27, 50, 70]

Replaces 3 items starting from index 2 with

27

,

29

and

31

myFavoriteNumbers.splice(2, 2, 27, 29, 31);  // [5, 16, 27, 29, 31, 50, 70]

Removes all the items of the array except the first and the last items

myFavoriteNumbers.splice(1, 5);  // [5,70]

Adds the two new items

100

and

200

to the array after the first item

myFavoriteNumbers.splice(1, 0, 100, 200);  // [5, 100, 200, 70]