Learning JavaScript Data Structures and Algorithms - Third Edition

Object-oriented programming in JavaScript

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 entire object, as follows:

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

As we can see, to declare a JavaScript object, [key, value] pairs are used, where the key can be considered an attribute of the object and the value is the property value. All classes that we will create in this book are JavaScript objects, such as Stack, Set, LinkedList, Dictionary, Tree, Graph, and so on.

In Object-oriented programming ( ...