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()); ...
