JavaScript Course - arrays (6/20)

Arrays in JavaScript are a type of data structure that allows you to store multiple values in a single variable. These values can be of any type, including numbers, strings, objects, or even other arrays. Arrays are particularly useful for managing lists of items and performing operations on collections of data.

Key Features of Arrays:
Indexed Collection:

Each element in an array is assigned a numerical index starting from 0. This allows you to access elements using their index.
Example: In an array let fruits = ['Apple', 'Banana', 'Cherry'];, fruits[0] returns 'Apple'.
Dynamic Size:

Arrays in JavaScript are dynamic, meaning you can add or remove elements as needed without specifying an initial size.
Example: You can add an element using fruits.push('Date');, and remove one using fruits.pop();.
Heterogeneous Elements:

Arrays can hold elements of different types, allowing you to mix numbers, strings, objects, and other arrays.
Example: let mixedArray = [1, 'two', { three: 3 }, [4, 5]];
Built-in Methods:

JavaScript arrays come with many built-in methods for common tasks such as adding, removing, and searching for elements.
Examples: push(), pop(), shift(), unshift(), splice(), slice(), forEach(), map(), filter(), reduce(), etc.