Learning JavaScript Data Structures and Algorithms

Object-oriented programming

JavaScript objects are very simple collections of name-value pairs. There are two ways of creating a simple object in JavaScript. The first way is as follows:

var obj = new Object();

And the second way is as follows:

var obj = {};

We can also create an object entirely as follows:

obj = {
    name: {
        first: 'Gandalf',
        last: 'the Grey'
    },
    address: 'Middle Earth'
};

In object-oriented programming (OOP), an object is an instance of a class. A class defines the characteristics of the object. For our algorithms and data structures, we will create some classes that will represent them. This is how we can declare a class that represents a book:

function Book(title, pages, isbn){ this.title = title; this.pages = pages; this.isbn = isbn; ...