If you have an array which is containing many more arrays, read the article to learn how to flat it.
In this article, I will show you the 2 ways for checking if a value exists in an array.
Arrays are used to store multiple values in a single variable, and here's 5 methods for them.
Strings are useful for holding data that can be represented in text form, and here's 5 methods for them.
Console object has many useful methods, and here's eight of them.