What is JavaScript array.splice()?

So what is array.splice()?

ArrayName.splice(start, how_many_items_to_remove, item1, item2, ...);

• The first parameter 'start' is the index to start.

• The second parameter 'how_many_items_to_remove' it's how many items to be removed from an array.

• The third parameter is what values to add to the array.

For Example:

let cars = ['Volvo','BMW','Toyota', 'Audi'];
let result = cars.splice(2,1,'Mercedes');

console.log(result);

// ['Volvo', 'BMW', 'Mercedes', 'Audi']

More in this series:

What is JavaScript indexOf()?

indexOf() finds the first occurrence of a string and returns the index. So an example: The above should return 1. Because the letter 'e' in the string is at index 1. But if the indexOf() string does not exist like example: It will return -1 if it does not exist.

https://joshua-kang.com/what-is-javascript-indexof