Tutorial Series

Working with Arrays in JavaScript

An array in JavaScript is a type of global object used to store data. Arrays can store multiple values in a single variable, which can condense and organize our code. JavaScript provides many built-in methods to work with arrays, including mutator, accessor, and iteration methods.
  • In this tutorial, we will learn how to create arrays; how they are indexed; how to add, modify, remove, or access items in an array; and how to loop through arrays.
  • JavaScript has many useful built-in methods to work with arrays. Methods that modify the original array are known as mutator methods, and methods that return a new value or representation are known as accessor methods. In this tutorial, we will focus on mutator methods.
  • This tutorial will go over methods that will concatenate arrays, convert arrays to strings, copy portions of an array to a new array, and find the indices of arrays.
  • In JavaScript, the array data type consists of a list of elements. There are many useful built-in methods available for JavaScript developers to work with arrays. In this tutorial, we will use iteration methods to loop through arrays, perform functions on each item in an array, filter the desired results of an array, reduce array items down to a single value, and search through arrays to find values or indices.