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Learning JavaScript Data Structures and Algorithms - Third Edition
book

Learning JavaScript Data Structures and Algorithms - Third Edition

by Loiane Avancini
April 2018
Beginner to intermediate content levelBeginner to intermediate
426 pages
10h 19m
English
Packt Publishing
Content preview from Learning JavaScript Data Structures and Algorithms - Third Edition

Using the Dictionary class

To use the Dictionary class, first we need to create an instance, and then we will add three emails to it. We will use this dictionary instance to exemplify an email address book.

Let's execute some code using the class we created:

const dictionary = new Dictionary(); 
dictionary.set('Gandalf', 'gandalf@email.com'); 
dictionary.set('John', 'johnsnow@email.com'); 
dictionary.set('Tyrion', 'tyrion@email.com'); 

If we execute the following code, we will get the output as true:

console.log(dictionary.hasKey('Gandalf')); 

The following code will output 3 because we added three elements to our dictionary instance:

console.log(dictionary.size()); 

Now, let's execute the following lines of code:

console.log(dictionary.keys()); ...
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Learning JavaScript Data Structures and Algorithms

Learning JavaScript Data Structures and Algorithms

Loiane Avancini

Publisher Resources

ISBN: 9781788623872Supplemental Content