#arrays

Arrays

Arrays are one of the most-used data structures in JavaScript. They’re ordered lists of values, and they come with a rich set of built-in methods for searching, transforming, and iterating over data. If you’ve worked through Functions, you’ve already seen map, filter, and reduce in passing — this tutorial covers arrays from the ground up. Creating Arrays // Array literal (most common) const fruits = ["apple", "banana", "cherry"]; // Empty array const empty = []; // Arrays can hold mixed types (though you usually wouldn't) const mixed = [1, "hello", true, null, { name: "Alice" }]; // Array. Read more →

April 14, 2026

Arrays

Introduction Arrays are data structures that contain a list of sequenced data. They are often organized close together in computer’s memory or storage to optimize for iteration. Arrays are one of the most fundamental data structures in programming. They serve as a building block for many other advanced data structures and algorithms. By the end of this tutorial, you’ll understand what arrays are, how they work, and their various applications. Read more →

September 11, 2023