Array Methods Part 2

Arrays have more built-in methods that can help us with common tasks. Here are some of them:

• sort() - sorts the elements of an array.

• reverse() - reverses the order of elements in an array.

• indexOf(element) - returns the index of the first occurrence of an element in the array, or -1 if it's not found.

• lastIndexOf(element) - returns the index of the last occurrence of an element in the array, or -1 if it's not found.

• includes(element) - returns true if the array contains the specified element, otherwise returns false.

Here is an example of how to use the sort method:

let myArray = ["orange", "banana", "apple"];
myArray.sort();
console.log(myArray);

This will output ["apple", "banana", "orange"].

Example of the reverse method:

let myArray = [1, 2, 3, 4, 5];
myArray.reverse();
console.log(myArray);

This will output [5, 4, 3, 2, 1].

Example of the indexOf method:

let myArray = [10, 20, 30, 40, 50, 30];
let index = myArray.indexOf(30);
console.log(index);

This will output 2.

Example of the lastIndexOf method:

let myArray = [10, 20, 30, 40, 50, 30];
let index = myArray.lastIndexOf(30);
console.log(index);

This will output 5.

Example of the includes method:

let myArray = ["apple", "banana", "orange"];
let hasBanana = myArray.includes("banana");
console.log(hasBanana);

This will output true.