Ruby Build an Address Book in Ruby Search Appending Contacts

Posted by PRAKASH ANAND
PRAKASH ANAND
Pro Student 5,060 Points

inside of the address_book variable. What does it mean? I didn't get this

I didn't get this

address_book.rb 
contact = Contact.new
contact.first_name = "My"
contact.last_name = "Name"
address_book=AddressBook.new